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.
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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
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