1. Material : Body : WCB, A105, ASTM A182 F316

Spring : 60Si2Mn, 316

Ball : A105+ENP, ASTM A 182 F16

Packing : PTFE, PTFE

Cover : A105, 316

"O” ring : Rubber

Sliding bearing : PTFE+stainless steel , 316+PTFE

Nuts and seat and stud: 316

2. Pressure: PN1. 6-10. 0Mpa, Class 150-1500Lb

3. Flange dimension follows : JB/T 79-59 , GB 9113 , HG20592-97 , ANSI B16. 5

4. Test and inspection follows : JB/T 9092-89 , API 598

5. Suitable Medium : Natural gas, liquefied gas, petroleum and other medium.

6. Atuated type : Worm gear , Air operated, electric driving, comblined air and hydraulic driving etc.