DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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About Pressure-Relief Valves
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About Grease Fitting Threads
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Compact Pressure-Relief Valves
Due to their small size, these valves are often installed on tanks in low-clearance areas. They begin opening at the set pressure. Nylon valves fully open at about 10% over the set pressure and steel valves fully open at about 50% over the set pressure. Valves begin closing as pressure drops and fully close when the system pressure is restored below the set pressure. All have a vent outlet to exhaust discharge directly. Set pressure is not adjustable.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air
- Temperature Range: Not Rated
Inlet | Each | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Location | Maximum Pressure, psi | Relief Port Location | Overall Ht. | Specifications Met | Set Pressure, psi | 1-9 | 10-Up | |
NPTF Male Inlet and Relief Vent | |||||||||
| 1/8 | Bottom | 1 | Top | 1/2" | MS35670 | 0.3 | 0000000 | 00000 | 00000 |
| 1/4 | Bottom | Not Rated | Top | 1 1/8" | __ | 1 | 0000000 | 00000 | 0000 |
| 1/4 | Bottom | Not Rated | Top | 1 1/8" | __ | 7.5 | 0000000 | 00000 | 00000 |
| 1/4 | Bottom | Not Rated | Top | 1 1/8" | __ | 15 | 0000000 | 00000 | 0000 |
| 3/8 | Bottom | Not Rated | Top | 1 3/16" | __ | 1 | 0000000 | 0000 | 0000 |
| 3/8 | Bottom | Not Rated | Top | 1 3/16" | __ | 7.5 | 0000000 | 00000 | 00000 |
| 1/2 | Bottom | Not Rated | Top | 1 3/8" | __ | 1 | 0000000 | 00000 | 00000 |
| 1/2 | Bottom | Not Rated | Top | 1 3/8" | __ | 7.5 | 0000000 | 00000 | 00000 |
- For Use With: Grease, Oil
- Temperature Range: Not Rated
Inlet | Each | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Location | Maximum Pressure, psi | Relief Port Location | Overall Ht. | Specifications Met | Set Pressure, psi | 1-9 | 10-Up | |
NPTF Male Inlet and Relief Vent | |||||||||
| 1/8 | Bottom | 5 | Top | 1/2" | MS35670 | 1 | 000000 | 00000 | 00000 |
| 1/8 | Bottom | 15 | Top | 1/2" | MS35670 | 7.5 | 000000 | 0000 | 0000 |
| 1/8 | Bottom | 25 | Top | 1/2" | MS35670 | 15 | 000000 | 0000 | 0000 |
| 1/8 | Bottom | 80 | Top | 1/2" | MS35670 | 45 | 000000 | 0000 | 0000 |
| 1/8 | Bottom | 140 | Top | 9/16" | MS35670 | 80 | 0000000 | 0000 | 0000 |
| 1/8 | Bottom | 200 | Top | 1/2" | MS35670 | 100 | 0000000 | 0000 | 0000 |
| 1/8 | Bottom | 650 | Top | 1/2" | MS35670 | 400 | 0000000 | 0000 | 0000 |
BSPT Male Inlet and Relief Vent | |||||||||
| 1/8 | Bottom | 1 | Top | 1/2" | __ | 0.3 | 0000000 | 0000 | 0000 |
| 1/8 | Bottom | 5 | Top | 1/2" | __ | 1 | 0000000 | 0000 | 0000 |
| 1/8 | Bottom | 80 | Top | 1/2" | __ | 45 | 0000000 | 0000 | 0000 |
Breather Vents
Protect against excess vacuum and pressure in cylinders, gear boxes, enclosures, manifolds, and tanks. You can also use these breather vents to block debris from entering equipment.
Breather vents with splash guard are good for containers that are often filled and drained; they have a guard that prevents oil from splashing out of the vent hole.
For technical drawings and 3-D models, click on a part number.
| Style | Pipe Size | Max. Flow Rate | Max. Pressure, psi | Max. Temp., °F | Ht. | For Use With | Removes Particle Size Down To, microns | Features | Each | |
NPT Male | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Steel Body and Fitting | ||||||||||
| D | 1/8 | Not Rated | Not Rated | 225° | 1" | Air, Inert Gas, Oil, Water | 40 | __ | 0000000 | 000000 |
| D | 1/4 | Not Rated | Not Rated | 225° | 1" | Air, Inert Gas, Oil, Water | 40 | __ | 0000000 | 00000 |
| D | 3/8 | Not Rated | Not Rated | 225° | 1 1/16" | Air, Inert Gas, Oil, Water | 40 | __ | 0000000 | 00000 |
| D | 1/2 | Not Rated | Not Rated | 225° | 1 3/16" | Air, Inert Gas, Oil, Water | 40 | __ | 0000000 | 00000 |
| D | 3/4 | Not Rated | Not Rated | 225° | 1 1/4" | Air, Inert Gas, Oil, Water | 40 | __ | 0000000 | 00000 |
| E | 1/8 | Not Rated | Not Rated | 225° | 1 3/16" | Air, Inert Gas, Oil, Water | 40 | Splash Guard | 0000000 | 00000 |
| E | 1/4 | Not Rated | Not Rated | 225° | 1 3/16" | Air, Inert Gas, Oil, Water | 40 | Splash Guard | 0000000 | 00000 |
| E | 3/8 | Not Rated | Not Rated | 225° | 1 1/4" | Air, Inert Gas, Oil, Water | 40 | Splash Guard | 0000000 | 00000 |
| E | 1/2 | Not Rated | Not Rated | 225° | 1 5/16" | Air, Inert Gas, Oil, Water | 40 | Splash Guard | 0000000 | 00000 |
| E | 3/4 | Not Rated | Not Rated | 225° | 1 3/8" | Air, Inert Gas, Oil, Water | 40 | Splash Guard | 0000000 | 00000 |