Double Spring Type Safety Valve
Features
1. Two or Three-piece body design
2. Double block and bleed or automatic pressure release in body chamber
3. Trunnion supported design reduces operating torque
4. Two sets of O-rings plus firesafe stem packing prevents leakage
5. Corrosion resistant low friction bearings
6. 17-4PH or Inconel seat springs
7. Sealant injection fittings for emergency stem or seal sealing
8. Direct mount topworks pad for actuator or gear operator
9. 8" & larger valves are equipped with lifting lugs
10. Locking device (lock not included)
11. NACE MR0175 (Superseded by ISO 15156)
12. Anti-blowout trunnion stem design
Standards
These valves comply with the applicable requirements of the following standards:
Design and manufacture:API6D,BS5351,API608,ASME 16.34
Face to face(end to end):ASME B16.10/API6D
Flange connection:ASME B16.5,26"-60" to ASME B16.47 or to API605 on request
Test and inspection:API598/API6D
Produce Ability
Size:NPS 2"-56"
Pressue:Class 150-2500
Material:WCA,WCB,WCC,WC1,WC5,WC6,WC9,C5,C12A,CA15,LCB,LCC,CF8,CF8M,CF3,CF3M,CF8C
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