About Pressure-Relief Valves
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Air-Release Valves for Oil and Fuel
- Max. Pressure: 400 psi
- Temperature Range: -20° to 500° F
Use this valve to eliminate air pockets in systems for oil, diesel fuel, gasoline, and kerosene. Valve has a vented relief port to exhaust discharge directly. Body is 304 stainless steel for excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Inlet | Relief Port | |||||
|---|---|---|---|---|---|---|
| Pipe Size  | Location | Pipe Size | Location | Overall Ht. | Each | |
NPT Female Inlet and Relief Port | ||||||
304 Stainless Steel Body | ||||||
| 3/4 | Bottom | 1/2 | Top | 7" | 0000000 | 0000000 |
Adjustable Pressure-Relief Valves for Fuel
- For Use With: Diesel Fuel, Fuel Oil, Gasoline, Kerosene
- Temperature Range: -20° to 400° F
To gradually relieve pressure in lines for diesel fuel, fuel oil, gasoline, and kerosene, these valves begin opening at the set pressure and fully open at about 10% over the set pressure. They begin closing as pressure drops and close when the system pressure is restored below the set pressure. Adjust the set pressure within the range.
For technical drawings and 3-D models, click on a part number.
Inlet | Relief Port | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Location | Maximum Pressure, psi | Pipe Size | Location | Set Pressure Adjustment Method | Overall Ht. | Choose a Set Pressure Range, psi | Each | |
NPT Female Inlet and Relief Port | |||||||||
Brass Body—416 Stainless Steel Seal | |||||||||
| 3/8 | Bottom | 1,000 | 3/8 | Side | External Adjustment Screw | 5 3/8" | 0000000 | 0000000 | |
| 1/2 | Bottom | 1,000 | 1/2 | Side | External Adjustment Screw | 6 3/16" | 0000000 | 000000 | |
| 3/4 | Bottom | 1,000 | 3/4 | Side | External Adjustment Screw | 6 15/16" | 0000000 | 000000 | |
| 1 | Bottom | 1,000 | 1 | Side | External Adjustment Screw | 8 1/4" | 0000000 | 000000 | |
| 1 1/4 | Bottom | 1,000 | 1 1/4 | Side | External Adjustment Screw | 9 9/16" | 0000000 | 000000 | |
| 1 1/2 | Bottom | 1,000 | 1 1/2 | Side | External Adjustment Screw | 11 1/16" | 0000000 | 000000 | |
| 2 | Bottom | 1,000 | 2 | Side | External Adjustment Screw | 13" | 0000000 | 00000000 | |
Precision-Adjustment Pressure-Relief Valves for Fuel
- For Use With: Diesel Fuel, Fuel Oil, Gasoline, Kerosene
- Temperature Range: -60° to 450° F
A finely threaded adjustment screw lets you make precise set pressure adjustments. These valves are for use with diesel fuel, fuel oil, gasoline, and kerosene. They begin opening at the set pressure and fully open at about 10% over the set pressure. Valves begin closing as pressure drops and fully close when the system pressure is restored below the set pressure. Adjust the set pressure within the range.
Valves with a bronze body are harder and more durable than valves with a brass body for a longer service life.
For technical drawings and 3-D models, click on a part number.
Inlet | Relief Port | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Location | Maximum Pressure, psi | Pipe Size | Location | Set Pressure Adjustment Method | Overall Ht. | Choose a Set Pressure Range, psi | Each | |
NPT Male Inlet and NPT Female Relief Port | |||||||||
Brass Body and Seal | |||||||||
| 1/2 | Bottom | 600 | 1/2 | Side | External Adjustment Screw | 5 7/8" | 0000000 | 0000000 | |
| 3/4 | Bottom | 600 | 3/4 | Side | External Adjustment Screw | 6 1/4" | 0000000 | 000000 | |
Bronze Body and Seal | |||||||||
| 1 | Bottom | 600 | 1 | Side | External Adjustment Screw | 7 1/2" | 0000000 | 000000 | |
| 1 1/4 | Bottom | 600 | 1 1/4 | Side | External Adjustment Screw | 8 1/4" | 0000000 | 000000 | |
| 1 1/2 | Bottom | 400 | 1 1/2 | Side | External Adjustment Screw | 9 1/2" | 0000000 | 000000 | |
| 2 | Bottom | 400 | 2 | Side | External Adjustment Screw | 10 7/8" | 0000000 | 000000 | |
| 3 | Bottom | 300 | 3 | Side | External Adjustment Screw | 13 3/16" | 0000000 | 00000000 | |
Made-to-Order Pressure-Relief Valves
Design a valve specifically for your process media and set pressure. Choose from a valve for air, inert gas, water, hydraulic oil, fuel oil, gasoline, or diesel fuel and a set pressure. These valves begin opening at the set pressure and fully open at about 10% over the set pressure. They begin closing as pressure drops and fully close when the system pressure is restored below the set pressure. Body is 316 stainless steel for exceptional corrosion resistance.
To Order: Please specify medium and a set pressure in 1 psi increments from the range listed in the table.
Inlet | Relief Port | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Location | Maximum Pressure, psi | Pipe Size | Location | Temperature Range, °F | Overall Ht. | Set Pressure Range, psi | Medium | Each | |
NPT Female Inlet and NPT Female Relief Port | ||||||||||
316 Stainless Steel Body—Fluoroelastomer Seal | ||||||||||
| 1/2 | Bottom | 3,300 | 3/4 | Side | -10° to 400° | 7 1/2" | 150 to 2,699 | Gasoline | 0000000 | 0000000 |
NPT Male Inlet and NPT Female Relief Port | ||||||||||
316 Stainless Steel Body—Fluoroelastomer Seal | ||||||||||
| 3/4 | Bottom | 3,300 | 3/4 | Side | -10° to 400° | 7 1/2" | 150 to 2,269 | Gasoline | 0000000 | 000000 |
| 1 | Bottom | 3,300 | 1 | Side | -10° to 400° | 7 1/2" | 150 to 2,421 | Gasoline | 0000000 | 00000000 |