Plastics Industry

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tourist train - China Manufacturer

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Natural polymer processing stage

This period to a natural polymer, is characterized by the modification and processing of the cellulose. 1869 Americans JW Hyatt cellulose nitrate, camphor and a small amount of alcohol can be made from a plastic material, under h eat and pressure molding plastic products, named celluloid. Newark, in the United States in 1872 to engage in the production. At that time, in addition to used as ivory substitutes, also processed into the carriage, and the car s windshield and movie film, began a tradition of the Plastics Industry, also developed molding technology.
1903 German A. Ai Xing Green invented a nonflammable cellulose acetate and injection molding method. Bayer AG, Germany, industrial production in 1905. In the meantime, some of the chemists in the laboratory synthesis of a variety of polymers, such as novolac resin, poly (methyl methacrylate), polyvinyl chloride and other laid the foundation for the later development of the plastics industry. 1904 World plastics production only 10kt, have not formed an independent industrial sector.shoot the chute

Synthetic resin phase

    This period based on synthe tic resin as the basic raw material for the production of plastic. 1909 Americans LH Baekeland in synthetic resins with phenol and formaldehyde, made the breakthrough, achieved a thermosetting resin â"€ â"€ phenolic resin patents. Phenolic resin, adding fillers, hot pressed molded products, laminates, coatings and adhesives. This is the first totally synthetic plastic. Universal phenolic resin production was established on 1910   factory. Before the 1940s, Bakelite is the most important varieties of plastic, accounts for about 2/3 of the production of plastic. Mainly used in electrical, instrumentation, machinery and automotive industries.

the claw has four claw

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pipe brackets - China Manufacturer

Thank you for inquiry my pipe brackets, Tel: 0086-577-61603900, E-MAIL:sales@steel-pipeclamp.com

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 U-tube card installation steps are as follows: U-shaped claw, the claw has four claw; provide two U-shaped bayonet; provide a counterweight; provide four U-shaped bracket; said U type claw plastic material by injection molding; When assembled, the U-shaped bayonet bonded in the U-shaped pawl, the four U-shaped bracket are respectively fixed in the U-shaped claw four claws with, and said U-shape bracket close to the counterweight; use of the U-shaped claw clamping said U-shaped mount and said counterweight fast, and then by welding the U-shaped bayonet said counterweight is fixed. The device of the present invention are derived from a U-shaped claw tooling, simple processing, and low cost will not affect the production line with the fluctuations in the size of parts assembly, to better meet the requirements of welding assembly.

How to improve the binding capacity stainless steel electroless nickel deposits

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steel pipe fittings - China Manufacturer

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Stainless steel parts (drive shaft, meshing, dynamic fitting) electroless nickel plating, to improve the uniformity of the coating and self-lubricating, than chromium electroplating. Stainless steel electroless nickel plating is often bad pretreatment coating and the substrate b inding force is not ideal, and the urgent need to address the problems in the actual production.

 Flash plated original process: mechanical polishing organic solvent degreasing → → the chemical degreasing → hot water washing → electrochemical degreasing → hot water washing → cold washing → 30% HCl → cold washing → 20% HCl (50 ℃) → cold washing → nickel → electroless nickel plating.stainless steel clamps

The shortcomings of the original process: Single HCL descaling ef fect is not good; complex shape pieces of flash bad coverage ability affect the uniformity of electroless nickel plating nickel plating; longer due process may cause stainless steel fresh surface re-oxidation into film; flash plating nickel electroless nickel plating solution and other solution is easily contaminated. To this end, it was to improve the process.

Improvement Process: polishing, degreasing processes with the original process → mixed acid activation (10% HCl +5% NH4F, 60 ℃) → hot water in addition to the film (25% HCl +8% HNO3 +10% HF) → cold washing → → Electroless nickel plating.stainless steel pipe fittings

Improvement of the advantages of the process:

â'  using a mixed acid to remove the stainless steel surface of insoluble FeCrO4 oxide film, Si, SiO2, so that the chemical activity enhancement of the surface of the substrate;

â'¡ The process can be simplified to avoid the stainless fresh surface and re-oxidation; â'¢ increase substrate preheating step, the elimination of the stress generated by the coating and the substrate due to temperature. Therefore, electroless plating nickel matrix binding force, the plating speed fast.steel pipe fittings

Stainless steel production process of using liquid ammonia

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stainless steel elbow - China Manufacturer

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 In a stainless steel production process during the cold rolling after annealing, many companies use liquid ammonia gas protection as annealing. But liquid ammonia is a toxic gas, are dangerous chemic als in use, governance slightest negligence can easily leak once the leak will cause ammonia poisoning, light eyes, noses and burning sensation, runny nose, cough, sound hiss, headache, the jets off edema, severe cases can cause paralysis of the central nervous system, causing cramps or breathing reflex jets off to stop the rapid death.stainless steel pipe fittings

       Illegal use of a the liquid ammonia phenomenon is mainly focused on two aspects.stainless steel clamps

       The first is placed wrong with liquid ammonia, empty and full bottles of liquid ammonia is mixed at the same time on a production workshop, no specialized liquid ammonia placed between the event of a leak, the shop workers will suffer life-threatening.clamp ferrule

       Followed by the imperfect protection facilities, and a lot of liquid ammonia placed between supporting the anti-leak device, liquid ammonia manipulation staff not wearing gas masks and other shop floor workers do not have gas masks.

Stainless steel tableware Note

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stainless steel reducer - China Manufacturer

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 1. Avoid storage acid, too alkaline foods.

Not suitable for stainless steel tableware Sheng salt, soy sauce, soup, etc., should not be in full bloom acidic fruit. Becaus e these foods in the electrolyte and the metal elements in the cutlery from the complex electrochemical reaction, which elements of excess dissolved release.

2. Bogey cook fried herbs.

Because of the complexity of herbal ingredients, mostly containing a variety of alkaloids, organic acids. When heated, it is easy and certain components from a chemical reaction in the stainless steel, so that efficacy decreased, and may even generate some of the more toxic substances.pipe fitting suppliers

3. Bogey and with the use of alum inum utensils.

One due to the two different hardness, the combination of the latter easier impaired; two aluminum and iron is two chemical activity of different metals, when they are a component in food (such as salts, acids, etc.) as the electrolyte, aluminum and The iron can form a chemical battery, more aluminum ions into the food. "Aluminum poisoning manifestations of mental decline, memory loss and senile dementia.

4. Hanged washed with strong bases and strong oxidizing agents.sanitary pipe fittings

Such as lye, soda and bleaching powder. These strong electrolyte is the same with some of the ingredients in the cutlery from the electrochemical reaction ", thus eroding the stainless steel cutlery, to its dissolution harmful elements.

5. Avoid fire cooking food.

Because of the small stainless steel thermal conductivity, the bottom heat slowly, such as firepower over too, can make the bottom of the charred, caking.

6. Poor quality, do not buy.sanitary pump

Inferior raw materials, production of rough because the stainless steel cutlery, contains a variety of heavy metals harmful to human health, especially lead, aluminum, mercury and cadmium, etc.

7 can not be empty burn.

Stainless steel cookware than iron products, aluminum products, thermal conductivity, heat and slow time, cause air burning cooker surface chrome plating aging off.

Stainless steel welded pipe replacement heat exchanger manifold advantages introduced

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stainless steel pipe fittings - China Manufacturer

Thank you for inquiry my stainless steel pipe fittings, TEL：+86-0577-86929669 , E-MAIL：zt@zt-pipe.cn

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The past five years, the stainless steel welded pipe industry development situation is relatively good, regardless of size, quality, production technology has made great strides, especially its demand areas are gradually expanding, with stainless steel pip e process maturing, many products can replace stainless steel seamless pipe, such as: the heat exchanger tubes, low pressure boiler tubes.

 

Stainless steel welded pipe production features production equipment is lightweight, less investment, speed of construction, welding method is simple, wide range of product specifications, dimensional accuracy, thickness deviation, smooth surface, high-yield. In the case of mass production, the welded pipe more than 20% lower than seamless cost. In recent years, the domestic use of the stainless steel tube welding? D rolling "production process, with cold-rolled coil to specification requirements slitting, after forming, multi-gun TIG welding machine welding tube, then cold-rolled (pull) the performance indicators that the weld is consistent with the parent material, product quality has improved significantly. Therefore, stainless steel seamless pipe, stainless steel pipe instead of more and more obvious advantages.sanitary pump

 

Stainless steel welded pipe production advantages:Stainless steel reducer

 

Stainless steel welded tube experience in the production process, by uniform compression, then through online bright solid melt annealing, the surface becomes very smooth, and the smooth surface is not easy to fouling, with anti-fouling. This is not only conducive to heat and does not require regular cleaning, saving time and effort to save money. Second, the pipe is a plate of deep processing products, the advantages of its uniform thickness is unparalleled, also can arbitrarily cut to length, high accuracy. Again, the stainless steel has the characteristics of corrosion-resistant, longer life use.

 

Stainless steel welded pipe products status quo:

 

Of industrial stainless steel pipe production capacity can not meet the domestic market demand, most of the existing stainless steel welded pipe mill process equipment is not complete, such as lack of heat treatment and online testing equipment, the production capac ity of the unit is not to give full play to, generally only can produce decorative tube, medium and low standard of decorative stainless steel welded pipe oversupply; higher standard industrial pipe, such as chemical mechanical tube, heat exchanger tube, only a few manufacturers can produce, production serious lack of capacity.Pipe Fittings

 

One of the alternatives "heat exchanger tubes":

 

The heat exchanger tube is an essential part of the column and tube heat exchanger equipment, heat exchanger tube is generally selected under the pressure of the fluid medium. Misunderstanding of the market on the choice of the heat exchanger tube is one of stainless steel welded pipe can not be used as a heat exchanger tube, but GB/151-1999 where expressly provided in the tube pressure ≤ 6.4MPa can choose stainless steel welded pipe. Especially in the case of stainless steel welded pipe production process is now very mature, fully meet the needs of the general heat exchanger tube, and demonstrated its unique advantages.

 

Since the heat exchanger tubes constituting the heat transfer surfaces of the heat exchanger, so the size of the heat exchanger tube has a great influence on the heat transfer. Using a small diameter tube, the heat transfer area of ??the heat exchanger per unit volume is large, the device is relatively compact, less consumption per heat transfer area of ??the metal, the heat transfer coefficient is also higher. Make trouble, there is easy scaling of the tube, difficult to clean, but the above problems can be avoided austenitic stainless steel welded pipe as a heat exchanger tube, because austenitic stainless steel welded pipe and both have good corrosion resistance is also equipped with a smooth surface, while the production of process maturity, austenitic stainless steel welded pipe as the first choice of the heat exchanger tube.

Improve the the stainless wear resistance of thermal spray and plating method

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Stainless steel flange - China Manufacturer

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1, the thermal spray

Thermal spraying is the use of some heat source to the coating material is heated to a molten or semi-molten state, and simultaneously by means of a flame st ream and a high-speed gas to atomization, and to promote these atomized particles are sprayed onto the substrate surface, deposition into with a certain The function of the coating. Thermal spray workpiece surface abrasion resistance, corrosion resistance, high temperature coating. Often exists between the coating material and substrate combination of three ways: mechanical bonding, physical bonding, and metallurgical bonding. With the low pressure plasma spraying, high-energy, high velocity plasma spraying, the emergence of high-speed flame spraying technique, the performance of the coating has been further improved: the porosity can be reduced from 015% to 1%; the bonding strength of the coating and the substrate can be up to 70 ~ 140MPa .pipe fittings

Studies have shown that HVOF spraying (HVOF) technology and plasma spraying (ASP) technology, iron-based amorphous alloy coating and iron-based amorphous and nanocrystalline coating, were prepared the 0Cr13Ni5Mo stainless steel substrate studied two Tu layer at room temperature friction and wear characteristics, the results show that the two sprayed prepared iron-based coating has high microhardness and smaller porosity, compact structure, was typical of the layered structure, improved coating wear resistance.
Sanitary pipe fittings
2, plating

In order to compensate for stainless steel and soft not wear, and the vulnerability of a large friction coefficient, the electroplating method commonly used to improve the stainless steel shaft and the mating member such as surface hardness and self-lubricating properties. Stainless steel is a surface easily passivated metal must be removed before plating surface passivation film, stainless steel degreasing, dipping, activation, pre-plated nickel and electroplating processes, chromium, zinc, copper, tin, precious metals can be obtained and other coatings.stainless steel clamps

Study shows that in the base material of stainless steel turbine cycle inverted rare earth chromium plating, the plating thickness of about 013mm, coating by the metal matrix phase and a rare earth salt particles the second phase composition, the hardness can reach 900 to 1000 Hv, the abrasion resistance of the coating base material 25 to 28 times, the product of the working life of 2 to 6 times higher than the original pieces of stainless steel

Stainless steel nitride technology

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pipe fittings - China Manufacturer

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Stainless steel nitrided to increase its hardness and improve its abrasion resistance and resistance to erosion. The nitriding treatment usually ferritic, martensitic and austenitic stainless steel and heat-resistant steel. The high-speed steel should be carried out low-temperature short-time nitri ded.Sanitary pipe fittings
Stainless steel nitrided lies in the removal of the passivation film, the passivation film is stainless steel to rust and the reason can not nitrided, so to make stainless steel nitrided, the key is the removal of the surface of the passivation film. The method of removal of the passivation film has a chemical and a mechanical method,
(1) sandblasting. Workpiece before nitriding with fine sand blast treatment under a pressure of 0.15-0.25MPa, until the surface was dark gray, clear immediately after the surface of dust into th e furnace.
(2) phosphide. Nitriding of the workpiece before the phosphating treatment can damage the metal surface of the oxide film, forming a porous loose phosphide layer, and is conducive to the infiltration of a nitrogen atom,
(3) chloride foam. Blasting or the finishing of the workpiece chloride foam or coating, can effectively remove the oxide film. Common the chlorides have TiCl2 and TiCl3.
The nitriding treatment usually ferritic, martensitic and austenitic stainless steel and heat-resistant steel.Pipe Fittings
The chemical method the workpiece is soaked in 50% (by volume) of hydrochloric acid (temperature 70 degrees), and then water cleaned.steel pipe fittings

Stamping elbow Cautions

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stainless steel pipe fittings - China Manufacturer

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Stamping elbow has some corrosion the (oxidizing acids, organic acids, cavitation), heat and abrasion resistance. Typically used in power plants, chemical, oil, and other equipment and materials. Chromium stainless steel stamping elbow welded p oor, should pay attention to the welding process, heat treatment conditions and the appropriate choice of welding electrodes. Stamping elbow drug skin titanium calcium type low hydrogen type. Titanium calcium type can be used for AC-DC and AC welding penetration shallow, and at the same time easy to redness, it is stainless steel stamping elbow as much as possible using a DC power supply.
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Steps / methods stamping elbow sclerosing larger cracks easily use different welding electrodes for welding, to ensure the quality of t he welding stamping elbow after welding. Using the same type of chromium stamping elbow welding electrodes must be carried out about 300 ° C above the preheating and post weld 700 ° C slow cooling treatment. Weldment can not post-weld heat treatment should be used chrome-nickel stamping elbow. In use, the different types of electrodes have different properties and characteristics, in use, in accordance with the corresponding need for selection, and to protect the quality of the welding stamping elbow.

Stamping elbow should be kept dry, titanium calcium type should be dried at 150 ℃ for 1 hour, low hydrogen type should be dried by 200-250 ℃ for one hour (not repeated drying or drug skin prone to cracking peeling) prevent the stainless steel stamping elbow drug skin sticky oil and dirt, to avoid causing increased carbon content and impact of the weldment quality stainless steel stamping elbow weld.Stainless steel elbow

To improve the corrosion resistance and weldability of the stamping elbow, the appropriate increase in the production of moderate stability elements Ti, Nb, mo, weldability than chromium stamping elbow. Preheat and post-weld above 200 ℃ and 800 ℃ tempered, using the same type of chromium stainless steel stamping elbow. Weldment is not heat-treated, you should use the chrome-nickel stainless steel stamping elbow.

Welding stamping elbow after heating will release carbide, carbide precipitation by repeated heating, carbide released stamping elbow will affect the performance and reduce the corrosion resistance and mechanical properties. The above is the need to pay attention to stamping elbow, you need to use, in accordance with the methods and matters to ensure good use of value and performance.sanitary pump

Stamping elbow with good corrosion resistance and oxidation resistance, and good to promote its use in different areas and promotion, widely used in chemical, fertilizer, petroleum, medical machinery manufacturing.

Stamping elbow is an elbow, widely used in different fields and industries and promote the app lication and popularization of varying degrees. Stamping elbow with plates of the same material of the pipe with a stamping die stamping into half a ring elbow, then two half-ring elbow group forming welding, stamping elbow welding in accordance with certain processes of production and processing . Below explain the precautions and methods of stamping elbow, in use strict attention, to ensure the quality and performance of the stamping elbow, it has a good life.

 

The clamp fittings connected conducive to construction safety

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stainless steel reducer - China Manufacturer

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    Stainless steel clamp pipe connection clamp pipe connection technology, the site only need cutting machine, roll groove machine and tight button snails

Bolt with wrench and construction organizations.Stainless steel reducer
 
The use of welded and flanged connections, in case of need to be equipped with a the complex power cable, cutting machines, welding machines and oxygen and acetylene

Cylinders, etc., which were brought to the construction organization complexity, and also there is the risk of leakage and fire hazards.

Welding slag generated by welding and gas cutting, unavoidable names fall into the inside of the pipe, piping valves and fittings and even prone to us e

Clogging to the device, but also pollute the water quality tube.stainless steel tee

In addition, welding and flange connection can not be high-intensity aerial work takes a long time to avoid name also prone to production safety
sanitary pump
Accident.

Clamp operation

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stainless steel pipe fittings - China Manufacturer

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 Stainless steel clamps, the application process is how to do? Next we come to the given description:

Pipe cutting machine steel pipe cutting desired length of incisions sectional level meter to check, to ensure that the incisio n pipe cross section and

Perpendicular to the axis. Incision if there are glitches, applications grinder sanded smooth.steel pipe fittings

2. Clamp will be machined grooved steel pipe mounted in the tail rack roller slot machine and roll groove machine, level Level copied, the steel pipe

Is in a horizontal position.clamp ferrule

3. Clamp the steel processing end section close to the roll groove machine, vertical steel pipe in the axis of the wheel surface.

4. Slowly depressed. Jack, on snapping steel pipe, pressure roller and start rolling slot machine, the wheel one rotation, then attention view

Observe whether the steel pipe cross-section still snapping roll groove machine, if not snapping, adjust the tube to the horizontal. If snapping, slowly
Stainless steel flange
Depressed jack, the upper pressure roller evenly rolled steel to a predetermined groove depth.

Clamp down, check the groove depth and width with a vernier caliper, and found to comply with the requirements of the standard, the jack unloading

Dutch, remove the pipe.

Clamp application process, the grasp of the Notes must be prepared and used to pay attention to maintenance, to prolong its life.

The bathroom waterproof decoration nine to create the perfect space for details

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stainless steel pipe fittings - China Manufacturer

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Now, for the renovation of toilets and bathrooms, how to reflect its comfort and safety, became a focus of the renovation. Reporters learned in an interview with the home improvement industry insiders, many bathroom renovation details involved in home decoration. If not handled properly, will not only directly affect the quality of home life in the future, it will affect the mood. Bathroom renovation should pay attention to the following points:
sanitary pipe fittings
Bathroom waterproof decoration details, ceiling:
Heavier because of water vapor in the bathroom, so, to select those with a waterproof, anti-corrosion, anti-rust characteristics of the material.
Details of sanitary waterproof decoration 2, the ground:
Be sure to do before the floor tile, waterproof;, to ensure that the tile surface with a draining slope (generally 1 or so), the slope towards the floor drain in the tiled; closed water test must be done after the ground finished laying tile, time to ensure that at least 24 hours; laying floor tiles and wall tiles slit aligned to ensure the overall sense of the whole bathroom to avoid visual clutter impression.
Stainless steel flange
Bathroom waterproof decoration details, wall:
Proof and waterproof wall tiles to do well, and to ensure smooth tiling and tiles slit, aligned to the overall sense of the wall and the ground; encountered the feed line export tiles cut smaller, appropriate, convenient flange cover to cover in the water supply on the incision, making a perfect appearance.

Bathroom waterproof decoration details, doors and windows:
Best bathroom windows for ventilation; If there is no window, with particular attention to the details of the door. If the sliding doors to prevent water to leak out, the door sector is slightly higher than the inside of bathroom; gap of the bathroom door and the ground to stay bigger, in order to facilitate the return air; bathroom, but also in the sliding door and between the bathroom tiles to do a layer of waterproofing.
stainless steel tee
The bathroom waterproof renovation laying detail 5, circuit:
Wire joints in the bathroom must be linked to tin, and to have to wrap waterproof tape and insulating tape, to ensure the safety; wire body must put on the flame tube; All switches and sockets must be moisture-proof box, and the location is also depending on electrical size and location may be, in order to ensure a reasonable convenience in use. This article from the Asia-Pacific sanitary www.ytwy360.com

Bathroom waterproof decoration details, water reform:
Water supply and drainage lines in the bathroom is best not to do too much change, if you want changes, according to the specific circumstances, such as the washing mac hine models, up and down the location of the water will be different.

Bathroom waterproof decoration details sanitary installation:
Best in renovation before launching Pitch remember well, selected by size bathtub, bath room, toilet, wash basin, sanitary ware, to avoid in the decoration of the wrong size; Toilet installation first potty mud seal use expansion screws or plastic glass fixed, so easy to repair when the toilet is clogged.

Details of sanitary waterproof decoration 8, ventilation:
Must have a bathroom exhaust fan and exhaust fan must be safe to have retrograde gate to prevent the polluted air back.

Details of sanitary waterproof decoration 9, Green:
Add angry. The toilet should not be forgotten is the green corner. The renovation can choose shade-tolerant, hygrophilous potted plants placed in the bathroom, so kind of angry and freshness.

Ceramic sanitary radiation hazards that you know how much?

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stainless steel clamps - China Manufacturer

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Radon have a high affinity for the human body fat, which affects the nervous system, people listlessness, drowsiness; vitro radiation mainly refers to the natural stone radiator direct exposure to the human body produces a biological effect, be the human body s blood-forming organs, nervous system, reproductive system, and digestive system damage.

A, β, γ-ray will destroy the body s lymphocytes, reduced immunity peoplesteel pipe fittings

Tile vitro radiation comes mainly from raw materials containing chemical elements, such as radium and thorium decay γ, β-ray.

2.β rays shorter range children, however, because its penetration is relativel y weak, a book you can block the penetration.

3.γ ray penetration is very strong. Penetrate the human body and in vivo cell collision will disrupt the body s lymphocytes which then lead to reduced immunity.
Sanitary pipe fittings
Second, tiles consumer radiation has two main aspects: radiation in vitro and in vivo radiation.

Body radiation refers radon radiation on the human body, Radon is a natural radioactive substances, colorless and tasteless, with easy-proliferation, soluble in water, and easily the characteristics of t he fat-soluble.

2 tiles in radon emanating primarily derived from a chemical substance called radium, such substances are contained by the raw materials of the tile, such as slag, as an emulsifier, zircon sand (which main the role is to improve the tile finish and wearable) contain radium.stainless steel pipe fittings

The major role of welded flange

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stainless steel elbow - China Manufacturer

Thank you for inquiry my stainless steel elbow, TEL：+86-0577-86929669 , E-MAIL：zt@zt-pipe.cn

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 Welded flange is a disk-shaped parts, the most common in the pipeline project, flanges are used in pairs. In the pipeline project, the flange is mainly used for the connection of the pipeline. N eed to connect pipes, various mounting a flange, low-pressure pipe can be used silk flange, the use of more than 4 kg pressure welding flanges. Plus sealing point between the two flanges, and then secured with bolts. Different pressure welded flange thickness and use different bolt. Pumps and valves, and pipe connections, facilities and equipment of the local, but also made a corresponding flange shape, also called a flange connection. All in two planes used in the surrounding bolted closed simultaneously connected parts, generally known as the "flange", such as ventilation pipe connections, this type of parts can be called a "flange parts. But this connection is only local device, such as flange connections and pumps, it is not good to pump called the "flange parts. Relatively small, such as valves, can be called "flange parts.Pipe Fittings
The welded flange role:
1, connecting piping and to keep the duct sealing performancestainless steel clamps;
2, to facilitate the replacement of a certain pipeline;
Easy to open the inspection line;
4, to facilitate certain conduit clo sed.stainless steel tee

What are the methods of identification of shoddy steel pipe?

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stainless steel elbow - China Manufacturer

Thank you for inquiry my stainless steel elbow, TEL：+86-0577-86929669 , E-MAIL：zt@zt-pipe.cn

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The shoddy steel pipe identification methods
     Shoddy steel pipe prone to folding. Folding steel pipe formed on the surface of various polyline, this defect is often longitudinall y throughout the entire product. Generate a folded reason is the the shoddy manufacturers to pursue high efficiency, the amount of reduction is too large, resulting in the ears, generated under a rolling folding, the folded products after bending will crack, a large decline in the strength of steel.
     2. The shoddy steel pipe appearance often pockmarked face. Ma surface is due to the steel surface irregularities uneven groove wear and tear caused by serious defects. Since the shoddy steel pipe manufacturers to the pursuit of profit, often the most excessive groove rolling. 3. The shoddy steel pipe surface is easy to produce scarring. There are two reasons: (1). Uneven the shoddy steel pipe material impurities. (2). Shabby, shoddy material manufacturers to guide and guard the equipment easy to stick easy to produce steel, of these impurities bite roll scarring.stainless steel clamps
     4. The inferior surface of the sheet is easy to produce cracks, because it dough adobe adobe many pores, the adobe due to thermal stress in the cooling process, resulting in cracks, after after rolling there crack.
     5. The shoddy steel pipe easily scratched due to shoddy steel pipe equipment is very easy to produce glitch scratch the surface of steel. The depth of scratches reduces the strength of steel.
     6. Shoddy steel pipe without metallic luster, pale red or similar color of the pig iron, because there are two two it blank is adobe. 2, non-standard the shoddy rolling temperature, the temperature of the steel is by visual observation, so that can not be carried out according to the provisions of the austenitic region of rolling steel performance standards naturally not.
     7. Thin and low, the shoddy steel pipe cross ribs often sufficient dissatisfaction with the phenomenon, because the manufacturers for large negative tolerance, finished the previous lane reduction is too large, iron-type small, pass sufficient dissatisfaction.Stainl ess steel flange
     8. The shoddy oval cross section of the steel pipe, because manufacturers in order to save material, finished roll two reduction is too large, the strength of this steel is greatly decreased, and does not conform to the standard of rebar Dimensions. 9. Uniform composition of the high-quality steel, cold shear tonnage, smooth and neat end face of the cutting head, shoddy material material difference, the end face of the cutting head, there are often off the meat of the phenomenon that is uneven and non-metallic luster. And because of shoddy materials manufacturers cutting head, the head and tail big ears.
     10. Shoddy steel material containing impurities, the density of steel is too small, and the size serious ultra-poor, so in the case of without a vernier caliper, were weighed it checked. For example, the rebar 20, the national standards set forth maximum negative tolerance of 5% Le ngth 9M single theoretical weight of 120 kg minimum weight should be: 120 X (l-5%) = 114 kilograms of weighing out the actual weight of more than 114 kg single small, shoddy steel because it is more than 5% negative tolerance. In general, the whole proportionate amount would be better, mainly taking into account the cumulative error probability theory this problem.
     11. The shoddy steel pipe diameter size fluctuations because; l, steel temperature instability of yin and yang face. 2, the composition of the steel is uneven. 3, poorly equipped, low-foundation strength, mill bouncing. Appear larger changes in the same week, reinforced Unevenness of fracture.steel pipe fittings

The large caliber elbow Profile push the system

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Large diameter elbow to push the system push the system, the wall thickness should not change under normal circumstances, but if because Tools reason, some places will be less w all phenomenon occurs, it is generally mentioned material, wall thickness to add some margin, such as the elbow is the wall thickness of 8.18mm, generally mentioned tube of about 8.5mm, to prevent the push the system, due to the local less thick ultra-poor. Whole good shape after elbow outside diameter, wall thickness dimensions are required. The following finishing process, after shot peening, the the elbow both inside and outside surface of the iron oxide skin removed, both ends of the groove processing to facilitate welding. Checked, after the process of playing steel word, spray paint, packaging, ready for shipping. Above 24 〃 seamless steel pipe elbow production methods as a raw material, after more than 24 〃 more than 600mm, maximum elbow between 2.032 m to 2.80 m, with a steel plate to do.stainless steel reduce
Large diameter elbow push the system has some differences with other production and processing of the elbow, need to be produced according to certain criteria, to ensure that the production of the push system elbow to show good use of the value in use. Elbow push the system molding process and production processes need to be in a certain space and venue production, production to comply with certain processes and process stainless steel pipe fittingsstandards. The elbow fittings has a different production technology and processes, processing, production and processing under certain circumstances, elbow fittings of the different nature of processing need to take certain precautions. To push the system elbow down, push the system to do long radius elbow first to the first selected steel pipe specifications proposed pipe material, the choice of quality steel production. Elbow push the system to certain expansion ratio, by theoretical calculations, and general expansion ratio between 33% -35%, pushing down the back. Short radius 219mm Usually the enlarged diameter was 50%. After selecting the raw material, the press push system elbow Specifications feed, and then consider the radius of curvature, for example, 90 ° elbow, through its curvature can be calculated Multi long material can be processed to a 90 ° elbow. By theoretical calculation can be calculated, then the length is cut to length for cutting. Finally, the material thermal push the system.Sanitary pipe fittings

The Groove Tube advantages of three: the system is stable and easy maintenance

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        The groove pipe connection has a unique flexible characteristics, so that pipe having anti-vibration, anti-shrinkage and expansion of capacity, compared with the welding and the flange connection, the increase in the stability of the pipeline system, and more suitable for changes in temperature, thereby protecting the pipeline valve member and also reduces the of pipeline stress on the destruction of the structural member.
 Stainless steel elbow

        The groove pipe connection has a unique flexible characteristics, so that pipe having anti-vibration, anti-shrinkage and expansion of capacity, compared with the welding and the flange connection, the increase in the stability of the pipeline system, and m ore suitable for changes in temperature, thereby protecting the pipeline valve member and also reduces the of pipeline stress on the destruction of the structural member.

        Groove Tube connected simple operation, the required operating space smaller, many convenient conditions for future repairs. When the pipes in need of repair and replacement, simply loosen the two clamps to any replacement, rotate, modify the section of pipe. Without damage to the surrounding wall, reducing maintenance time and maintenance costs.steel pipe fittings< /a>

What is slipknot elbow

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Slipknot elbow and general elbow is a common connection pipe installation fittings, connect two nominal diameter is the same or different pipe, the pipe do a certain angle turn.

The slipknot elbow Material 304,316 L two, inside and outside the high-end polishing equipment for treatment, to reach the surface precision requirements.Stainless steel elbow

It applies to the stainless steel pipeline system for the dairy, food, beer, beverage, pharmaceutical, cosmetics and other industrial fields.

Curvature radius 52-130 (mm)
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Nominal diameter 15-100 (mm)

Seamless elbow forming process of the heat pushing, stamping, extrusion, etc..

What is the significance of the installation of hydraulic equipment for the system as a whole

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The installation of the hydraulic equipment is the hydraulic equipment normal and reliable operation is an important part.skiving machine
Hydraulic equipment installation process is unreasonable , even install error will cause the hydraulic equipment can not operate normally, has brought huge economic losses to the production, or even cause a major accident. Therefore, we must pay attention to the installation of this important part of the hydraulic system.bsp connector

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Brake sudden failure of the hydraulic brake system failure

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Phenomenon: the car is moving, kick or consecutive kicks brake, brake pedal were riding in the end, the brake suddenly failed.
 

Reasons:
 skiving machine

(1) serious brake line rupture or joints out of line.
 

(2) Cylinder sleeves damaged or riding turned.
 

(3) damage to the master cylinder cup or riding turn.
 bsp connector

(4) no brake fluid in the master cylinder.
 

Diagnosis:
 

The occurrence of failure of Zhidongshiling, should immediately stop checking. First observation of brake fluid leaks. BOOT at the brake fluid brake master cylinder push rod; brake master cylinder push rod dust cover at the brake fluid leakage current serious riding turned mostly master cylinder cup or punish severely damaged; system, such as a wheel a large number of the edge of the brake drum brake fluid, the Wheel Cylinder sleeves are the pressure turned or serious damage. Pipeline leak brake fluid is generally visible, in the absence of leakage of brake fluid phenomenon, you should check the master cylinder reservoir fluid indoor brake fluid adequacy.hydraulic fittings suppliers

 

 

 

 

Note the installation of hydraulic equipment

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Installation and commissioning of a new hydraulic equipment, general precautions are as follows:

(A) install the assembly, the first into the main hydraulic parts and accessories subject to stringent cleaning and removal of rust and against everything dirt harmful to the working fluid. Hydraulic parts and pipe the oil port plug, plastic plug, plugs, etc. With the gradual dismantling of the progress of the project, instead of first relieved, to prevent dirt from port to enter inside the components.

(B) must ensure that the inner and outer surfaces of the tank, the the host mating surface and the other visible constituent element is clean.skiving machine

(C) the components in contact with the working fluid over the exposed parts (e.g. piston rod) should be protected to prevent dirt from entering.

(D) fuel tank cap, nozzle and air filter must be fully sealed to ensure that the unfiltered air into the hydraulic system.

(E) shall provide an explanation in the fuel tank or near the fuel tank at the nameplate of the oil type and system capacity.bsp connector

(F) the working fluid filtration equipment specified to the required standard of cleanliness, and then injected into the system before.

(G) The hydraulics work agencies joined together to complete the scheduled action, so pay attention to the quality of the connection assembly between (as Heart degrees, relative position, force status, fixed and sealed good or bad).hydraulic fittings suppliers

 

Leakage of hydraulic valve shut down parts of the common faults

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Stuffing box leakage is often called leakage, called the closure of parts within the vent. Off pieces leak inside the valve, not easy to find.
 

Off pieces of leakage can be divided into two categories: one is the sealing surface leakage and other seals roots leak.
 hydraulic hose fitting

Reasons causing the leak: bad sealing surface grinding; â'¡ The seals and the valve seat, the valve with no stringent; (3) the valve stem connection is not strong; â'£ stem bending and torsion, so up and down off pieces does not; â'¤ shut down too quickly, sealing surface contact is bad or has already damaged; improper â'¥ material selection, unable to withstand the corrosion medium; â'¦ regulating valve globe valve, gate use. Sealing surface withstand the erosion of the high-speed flow of the medium; â'§ certain media, gradually cooling valve is closed, the sealing surface appear slit will produce erosion phenomenon; â'¨ some of the sealing surface of the valve seat, the valve and the using the threaded connection between prone to oxygen concentration cell corrosion loose; the â'© due to welding slag, rust, dust and other impurities embedded, or mechanical parts fall off blocked spool in the production system, the valve can not be closed.hydraulic hose assemblies
 

Precautionary approach:
 

â'  before use must be carefully test pressure leak testing, found the leak or seal sealing surface roots leakage, handle before use; â'¡ to check in advance the various components of the valve is in good condition, can not use stem bending and torsion or the valve stem connection unavailable * valve; â'¢ valve crucial to make steady fresh, do not make Meng Jin, such as poor contact between the sealing surface or block obstacle should immediately open slightly, so that the debris outflow, then carefully closed; â'£ selection of valve , to consider not only the corrosion resistance of the valve body, but also to consider the closed parts of the corrosion resistance; â'¤ according to the structural characteristics of the valve, the proper use of the regulating valve should be used to adjust the flow of parts; â'¥ for medium cooling off valve large difference in temperature, to cool down before the valve closed look; the â'¦ seat, the valve flap and seal with threaded connect ion, you can use PTFE with filler thread, so that there is no gap; â'§ may fall into the valve of impurities, plus valve before the filter.hydraulic ferrule

Hydraulic equipment installation debugging

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(A) Jog: Jog pump, observe the oil pump rotation is correct, power, anti-oil output and sometimes also likely to have an accident, so remember when operation starts only "jog". Get ready for continuous operation when the pump sound normal and continuous output of oil and other irregularities, and no-load debugging.

(B) no-load debugging: the first l0 20 minutes at low speed, is sometimes necessary to remove the motor and the load of the fuel tank or oil connection. Especially during the cold season, with no load at low speed (warming up) is particularly important, some imported equipment often have strict requirements, some equipped with a heater tank fluid warming. The first trial run be able to run in the low-speed low-voltage action.hydraulic hose fitting

(C) uniform gradually boost acceleration, the specific method of operation is repeatedly tighten and immediately loosen the relief valve, pressure or flow rate of the flow valve to adjust the handle a few times, and pressure gauge observed pressure lifting speed changes and actuators changes in conditions such as heat, vibration and noise of the pump. Found the problem to analyze and solve.

(D) the debug single action combined with electrical machinery in accordance with the action cycle table first, and then transferred to the cycle of action debugging, check each action whether coordination. Generally will be in the process of debugging some problems, such as crawling, impact, and no change to other faults of complex domestic and imported equipment, if there is a difficult problem to solve, can be common consultation, if necessary, resort to hydraulic equipment manufacturers.hydraulic hose assemblies

(E) Finally, enter the full load debugging, the maximum working pressure and the maximum (minimum) speed test the technical performance of hydraulic equipment, check the power, heat, noise and vibration, high-speed impact, low-speed crawling. Check the various parts of the oil spill, the often-load does not leak site increased pressure Shique oil spill. Found the problem immediately removed, and make a written record.

If everything is normal, trial processing specimens. Commissioning is completed, after stopping machine generally want to recover and make a detailed debug log file. Some imported equipment debug log can be used as the basis for the claim.hydraulic ferrule

(F) by applying the above debugging good handle of the hydraulic equipment, and generally do not move. Handwheel on the upcoming packaging factory equipment should release all. Long-term without the equipment, should be the handwheel release the pressure valve to prevent the spring permanent deformation affects the mechanical equipment enabled various types of failures affect performance.

 

 

 

Common failure of the hydraulic valve stem down failure

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The the stem down failure reasons: â'  The operation excessive thread damage; â'¡ lack of lubrication or lubricant failure; â'¢ stem bending and torsion; â'£ surface finish is not enough; â'¤ fit tolerances are not allowed to bite too tight; â'¥ stem nut tilt; improper â'¦ material selection, such as stem and stem nut is made of the same material, easy to bite; the â'§ thread is corrosive medium (dark bar valve stem nut in the lower part of the valve); â'¨ lack of protection of open-air valve stem thread covered with dust and sand or rain frost and snow are corroded.
 skiving machine

Prevention methods:
 bsp connector

(1) careful operation, when closed, do not make Meng Jin, open to the top dead center, do not open enough will handwheel rewind twice, so that the thread on the side of the adhesion, to avoid media to promote stem upward impact; (2) regular checks of lubrication, maintaining normal lubrication; â'¢ Do not use a long lever opening and closing valves, accustomed to using a short lever workers forced to strictly control the sense of proportion, to prevent bending and stem (hand wheel and stem directly connected to the valve); â'£ improve processing or repair quality, meet regulatory requirements; â'¤ materials to corrosion, to adapt to the working temperature and other working conditions; the â'¥ stem nuts not to use the same material with the stem; â'¦ plastic for stem nut to checking the strength to not only consider good corrosion resistance and low coefficient of friction, must also consider the intensity of the problem, the strength is not enough, do not use; â'§ open-ai r valve stem protection sleeve to add; the â'¨ normally open valve, want to turn the hand wheel on a regular basis, so as not to stem rust live.hydraulic fittings suppliers

Other problems common to hydraulic valves

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Gasket leak: the main reason is impatience corrosion, not suited to working temperature and pressure;, high temperature valve temperature changes. Prevention: adapt to the working conditions of the washer, want to check on the new valve gasket material suitability should be replaced if not suitable. High temperature valve to use tight again bolts.
 skiving machine

Body cracking result: generally frozen. When it s cold, the valves should have insulation and heating measures, otherwise discontinued after should the valve and connecting pipe in the water to drain clean (if there is a valve at the end plugs, open wire blocking drainage).
 

The hand wheel damage: due to the impact or long lever violently operation. As long as the operator and other relevant personnel, could have been avoided.
 

Packing gland rupture: compression packing uneven force, or gland (usually cast iron) defective. Compression packing, rotary screw symmetry to not skew. Manufacture not only pay attention to the large and critical pieces, should also pay attention to the elements of the gland such times, otherwise the impact of the use.bsp connector
 

Stem and the valve plate connection failure: gate valve stem rectangular head with ram T-slot connection in the form of more T-shaped groove sometimes not processing, so that the stem rectangular head wear faster. Mainly from manufacturing to solve. But the use of units of the T-shaped slot complement processing it finish.hydraulic fittings suppliers
 

Gate valve gate can not be pressed tightly cover: double plate tension * top wedge, some poor valve, top wedge material (low-grade cast iron), using the soon worn or broken. The top wedge small pieces, not many of the materials used, using the unit can produce its own carbon steel, replaced the original iron castings.

 

 

China hydraulic seals market future

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    This year, relatively fast development of China s agriculture, water conservancy, energy, transportation and other industries to do this requires a lot of machinery and equipment to meet their development needs. With industri alization and the improvement of the level of automation, the equipment supporting a large number of high performance and high reliability of hydraulic pneumatic and sealing elements. Preliminary estimates, in 2010 the total demand for hydraulic, hydraulic, pneumatic and sealing products will increase from 200 million in 2005 to about 350 billion. , Hydraulic products from more than 100 billion yuan to 200 billion yuan, hydraulic products from 10 billion to $ 20 billion, pneumatic products from nearly 30 million to more than 50 billion yuan, sealing products from more than 30 million to $ 70 billion.hydraulic hose fitting

Construction machinery are the biggest users of hydraulic products, total industry sales of 42.3, the proportion will increase in the future. It is expected that the demand for hydraulic excavators in 2010 about $ 60000 80k too, loaders about 10 million -12 million units, the grader about 2,000 units, a roller about 1.5 million units, engineering cranes about 20,000 units, Forklift about 8 million units. In addition, China now has about 140 million units of construction machinery, is expected to reach 200 million units in 2010.hydraulic hose assemblies

Imported annually for the domestic production of excavators, road machinery, cement mixers and other supporting hydraulic parts, about $ 150 million or more. In short, for the construction machinery, maintenance of hydraulic and seals the market will face a new period of development.hydraulic ferrule
 

Brief description of the steps of the installation of the valve components during the assembly of hydraulic equipment

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Installation steps are as follows:

(A) The installation, first with clean kerosene or the diesel (hanged gasoline) cleaning the the element surface rust and other contaminants, careful not to unplug the plug plastic plug in the oil port, in order to avoid dirt from entering the valve within.skiving machine

(B) to design and manufacture of special valves according to relevant standards such as the performance test, pressure test, and so on.

(C) the installation of the plate valve components to check the oil seals port for missing or off, whether projecting mounting plane compression margin are the same variety of seals on the same plane as the amount of protrusion whether to install the O-ring groove of the oil port strain, whether mounting surface bumps made the disposal after assembly. O-ring coated with a little butter to prevent shedding.

(D) plate valve mounting screws (more than four) competing for times you want to tighten evenly. Not a single screw to tighten this will cause distortion of body and seal compression margin inconsistencies caused by oil spills and out of the seal on the floor.bsp connector

(E) out of the oil port symmetrical valve easy access to the oil port installed anti lookalike pressure valves, the installation should pay particular attention to the distinction between so as not to install the wrong.

(F) of the tubular valve, in order to install and easy to use, and often the two intake ports or two back to the oil port, install the ports will not be blocked with plug or other processing, in order to avoid the spray operation oil or malfunction.hydraulic fittings suppliers

(G) solenoid valve should generally horizontal installation, re-direct installation (two valves) the electromagnet general upward and this factor should be considered in the design of the mounting plate.

(H) relief valve (pilot) has a remote port blocked (tube) or mounting plate (plate) drilled through application plug when not using the remote control.

 

Descriptions accessories hydraulic equipment assembly installation steps

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  Auxiliary hydraulic system components, including the installation of the pipe and fittings, oil filter, oil cooler, seal, accumulator and instrumentation, etc. is good or bad can also seriously affect the normal operation of the hydraulic system does not allow the slightest negligence.

Design, it is necessary to consider the correct position of these auxiliary components configuration. Try to consider the use, ease of maintenance and adjustments, and pay attention to the neat appearance. The following highlights the installation of the tubing.hydraulic hose fitting

Piping installation quality impact to the oil spill, leak, vibration and noise, as well as the size of the pressure loss, and thus will have a variety of fault. The installation of the pipeline should be aware of the following:

(A) tubing length to fit. Construction gestures with wire bent into a desired shape, and then show decided to flowline length straight. Completely design often length may not be very accurate.

(B) satisfy the connection premise, the pipeline is as short as possible, avoid sharp turn, the corner positions as possible, in order to reduce the pressure loss.

(C) parallel and cross pipe spacing, at least 10mm to prevent mutual interference and vibration caused by the pipeline each other percussion grazing.hydraulic hose assemblies

(D) the tubing can be cold-formed (brass), bending (steel pipe) can also be used. Hot curved Bi tube pipe within the oxide should be removed.

(E) The suction pipe should be short, should be thicker, the the general suction nozzle are equipped with oil filter, oil filter must be at least in the oil below 200mm. Piston pump inlet pipe recommended nozzle mounted oil filter mouth, cut into the nozzle at a 45 ° bevel, helical faces toward the walls of the box, and so increase the flow area to reduce the flow rate and to prevent impurities from inhalation of oil pump.

(6) hydraulic system return pipe as far as possible away from the suction tube should be inserted under the oil tank, prevents back oil splash bubbles and quickly sucked into the pump. Return pipe nozzle should be cut to 45. Slant to expand the flow area to improve the flow of oil return status and prevent air anti-irrigation into the system.hydraulic ferrule

(G) relief valve oil return to the hot oil, should be kept away from the suction pipe, it can avoid the hot oil without cooling by pump suction system, causing the temperature rise.

 

 

Brief hydraulic cylinder installation steps

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(A) The installation of the hydraulic cylinder, to do a special protective cover seals, and the oil inlet and outlet and put the material filled with a special air intake, to ensure that the piston into the cylinder seals will not cut bad.

(B) To check the piston rod is bent, especially on long stroke cylinder. Piston rod bending will cause damage to the cylinder head sealing, leak, reptiles and fail to operate. And exacerbated partial wear of the piston rod. skiving machine

(C) of the hydraulic cylinder axis parallel with the rail. Particular attention to the situation when the piston rod fully extended. If they are not parallel, will have a greater lateral force, causing the fuel tank stuck commutation bad, reptiles and cylinder seal broken, such as the failure of failure. General rail basis, to adjust the hydraulic cylinder with a dial indicator. The piston rod side bus (extended) parallel to the V-shaped guide rail, bus bar, flat rails parallel tolerance is 0. 04 ~ 0.08mm / m.bsp connector

(D) of the installed base of the axis of the piston rod on both ends of the bearing surface, parallel error not greater than 0.05mm.hydraulic fittings suppliers

(E) the trip is longer hydraulic cylinders, piston rod and table join should remain floating (spherical pair connected), impact stuck to compensate for installation errors and compensation for thermal expansion.