PTFE Stem Packing Seals Used For Butterfly Valve

  PTFE Valve Stem Packing Seals

Stem-actuated control valves require some form of seal allowing motion of the stem from some external device (an actuator ) while sealing process fluid so no leaks occur between the moving stem and the body of the valve. The valve packing seal is an essential component of valves. Which is covered around the valve stem. The purpose of valve packing is to prevent leakage. In a typical valve, the gland follower is tightened until there is no leakage. The valve is then test-operated to make sure that the packing is not compressed so tightly that the valve does not turn easily.

Valve stem packing is a useful sealant for any industry that requires liquid transport. It is widely used in house plumbing, water and chemical transport systems, and boat motor systems. Any assembly that has valves, faucets, and stuffing boxes relies on valve packing for leakage prevention. The general term for this sealing mechanism is packing. Packing in a sliding-stem valve fits in a section of the valve body called the bonnet. The packing material takes the form of several concentric rings, stacked on the valve stem like washers on a bolt. These packing rings are forced down from above by the packing flange to apply a compressive force around the circumference of the valve stem

HONGDA is the professional manufacturer of valve stem packing seals materials in China, Depending on the application requirements, our valve stem packing materials are made of PTFE, filled PTFE, TFM, PEEK, carbon PEEK, PCTFE, Spring Energized Seals.

Valve packing seal is a string sealant that is used to prevent liquid leaks in valve stems and stuffing boxes.