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 Available in a full range of sizes and configurations
Drilling conforming to ANSI/ASME B 16.5 for Class 150 Flanges, or KS/JIS 10K Flanges Designed protect storage tank from excessive negative over-pressure, and standard air-Cushioned pallet assures minimal internal vapor leakage FEP TEFLON seat diaphragms are standard to increase reliability and extended service life, and make minimize sticking caused by resinous vapors and atmospheric moisture.
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.
Guided vacuum pallets assure smooth lift and closure, and assures reliable operation Suitable materials available for corrosive and extreme temperature service
▶ Consult our factory for special application.
Specifications
| Service | Vacuum Relief, End-of-line |
|---|---|
| Set vacuum, min/max Weight loaded type(standard) Spring loaded type | 22mmH2O(0.5oz/sq.in) / 700mmH2O(1psi) 700mmH2O(1psi) / Full Vacuum |
| Temperature range(standard) | Deflagration flame arrester |
Materials
| PART NAME | MATERIALS STANDARD | MATERIALS OPTIONAL |
|---|---|---|
| Body & Cover | 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 (Weight loaded type) VITON O-ring (spring loaded type) | Metal to metal |
▶ Other special materials and special specifications are available upon customer`s request.
