China API622 Low Emission Valve Stem Packing
TS N821 Low Emission Valve Stem Packing is researched and developed by TIANSHENG that it adopted special structure which make the Low Emission Valve Stem Packing plays the excellent function of anti-leakage; Especially it plays optimal sealing function under the pressure of 150LBS to 300LBS. It is composed of high purity flexible graphite, the purity of flexible graphite is above of 99.6 percent. There are two end rings on the top and bottom; The number of middle rings is according to customer requirements.
Application: It applies to the gate valve, isolating valve, regulating valves, and stop valves.
There is no leakage after 3000 times of movements of valve stem;
Leakage rate is below 1.0 x 10-8(Helium gas);
With low bolt torque;
Low stress release;
The pressure can be reach 42.0Mpa;
Certification: API 622 and ISO15848-1.