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About Pressure-Relief Valves
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Adjustable Vacuum-Relief Valves for Air and Inert Gas
- For Use With: Air, Inert Gas
- Temperature Range: -15° to 250° F
These valves begin opening at the set vacuum level and fully open at about 10% over the set point. They begin closing as the vacuum level drops and fully close when the system is restored below the set point. Adjust the set vacuum level within the range. Valves have a vented relief port to exhaust discharge directly.
For technical drawings and 3-D models, click on a part number.
Inlet | Set Vacuum | ||||||
|---|---|---|---|---|---|---|---|
Pipe Size | Location | Relief Port Location | Range , in. of Hg | Adjustment Method | Overall Ht. | Each | |
NPT Male Inlet and Relief Vent | |||||||
Brass Body—440C Stainless Steel Seal | |||||||
| 1/4 | Bottom | Top | 0 to 27 | External Adjustment Screw | 1 3/4" | 00000000 | 00000 |
Brass Body—Buna-N Seal | |||||||
| 3/8 | Bottom | Top | 0 to 27 | External Adjustment Screw | 2 1/16" | 00000000 | 00000 |
| 3/4 | Bottom | Top | 0 to 27 | External Adjustment Screw | 2 5/8" | 00000000 | 00000 |