NOMINAL SIZE
- 1-1/2", 2", 3", 4", 6", 8", 10", and 12"
CONNECTIONS
- ANSI/ASME B16.5 Class 150 Flange
- KS/JIS 10K Flange
Vacuum Relief Valve Designed protect storage tank from excessive negative over-pressure
Drilling conforming to ANSI/ASME B 16.5 for Class 150 Flanges.
or KS/JIS 10K Flanges Normally, when the pressure in the storage tank is lower than the Set Vacuum while maintaining the normally closed condition, the pallet opens and the external air is flowed to relieve the vacuum.
NBR(Buna-N), VITON and other seating materials are available when required Suitable materials available for corrosive and extreme temperature service FEP TEFLON seat diaphragms are standard to increase reliability and extended service life, and make minimize sticking caused by resinous vapors and atmospheric moisture.
▶ Consult our factory for special application.
Specifications
| Service | Vacuum Relief, End-of-line |
|---|---|
| Set vacuum, min/max | 22mmH2O(0.5oz/sq.in) / 700mmH2O(1psi) |
| Temperature range(standard) | -45℃~120℃(-113℉~+248℉) |
Materials
| PART NAME | MATERIALS STANDARD | MATERIALS OPTIONAL |
|---|---|---|
| Body | Carbon Steel, 304 S.S, 316 S.S, Aluminum | Hastelloy, Alloy 20, FRP, PTFE, ETFE LINED |
| Seat | 304 S.S, 316 S.S, Aluminum | Hastelloy, Alloy 20, FRP, PTFE, ETFE LINED |
| Pallet | 304 S.S, 316 S.S | Hastelloy, Alloy 20, FRP, PTFE, ETFE LINED |
| Pallet Guide | 304 S.S, 316 S.S | 316 S.S, PTFE COATING |
| Seating Diaphragm | FEP TEFLON | Metal to metal |
| Weather Hood | 304 S.S, Aluminum | 316 S.S |
▶ Other special materials and special specifications are available upon customer`s request.
