a stainless steel gate valve seal from the factory quality of the good or bad decision value significance of the valve for customer, here we introduce the stainless steel knife gate valve selection skills on the surface of the seal. Most of the seal gate valves to rely on outside force will ram pressure to the Industrial Valves seat, in order to ensure the sealing surface sealing. And stainless steel gate is closed, the sealing surface can only rely on medium pressure to seal, that depends on the medium pressure, the disc will be to the other side of the valve seat sealing surface pressure to ensure that the sealing surface of the seal.

the method how to solve the stainless steel valve stem failure: 1) careful operation, don't make MengJin when closed, open when not in top dead center, open back to handwheel after one or two laps, enough to make thread or upper, lest medium to promote stem upward shocks;

2. Check the lubrication condition of the stainless steel gate, maintain normal lubrication state;

3. Do not use long lever open and close the valve, used to use the short lever workers to strictly control the discretion, forcibly twisted stem (just in case Refers to the handwheel and direct connection of valve stem) ；

(4) improve the quality of processing or repair, meet the specification requirements;

(5) material to corrosion, to adapt to the working temperature and other working conditions;

6 stem nut do not use the same as the valve stem material;

7 plastic make stem nut, to calculating the intensity, cannot consider only good corrosion resistance and low friction coefficient, must also consider the strength, the strength is not enough, do not have to use;

today open the valve to add a protection to the valve stem;

pet-name ruby normally open valve, turn the handwheel, regularly in order to avoid the valve stem rust.

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