Valve Function Valve Function |
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For Use With For Use With |
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Valve Type Valve Type |
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Set Pressure Set Pressure |
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Inlet Thread Type Inlet Thread Type |
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Set Pressure Configuration Set Pressure Configuration |
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Inlet Gender Inlet Gender |
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Relief Port Connection Type Relief Port Connection Type |
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Maximum Temperature Maximum Temperature |
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Minimum Temperature Minimum Temperature |
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Activation Activation |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Inlet Connection Type Inlet Connection Type |
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 | Pipe |
About Pressure-Relief Valves
More
Adjustable Inline Pressure-Relief Valves for Chemicals
- For Use With: Potassium Sulfate, Sodium Hypochlorite
- Temperature Range: 0° to 140° F
With a three-port design, these valves allow inline flow from the inlet to the outlet during normal conditions and divert flow through the relief port in overpressure conditions. Often used with feed pumps for fertilizers and bleach, they have a PVC body and a PTFE seal for excellent chemical resistance. The relief port begins opening at the set pressure and fully opens at about 10% over the set pressure. It begins closing as pressure drops and fully closes when the system pressure is restored below the set pressure, resuming inline flow from the inlet to the outlet. Adjust the set pressure within the range.
For technical drawings and 3-D models, click on a part number.
Inlet | Outlet | Relief Port | Set Pressure | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Location | Maximum Pressure, psi | Pipe Size | Location | Pipe Size | Location | Range, psi | Adjustment Method | Overall Ht. | Each | |
NPT Female Inlet, Outlet, and Relief Port  | |||||||||||
Dark Gray PVC Body—PTFE Seal | |||||||||||
| 1/4 | Side | 350 | 1/4 | Side | 1/4 | Bottom | 10 to 150 | External Adjustment Screw | 3 17/32" | 00000000 | 0000000 |
| 1/2 | Side | 350 | 1/2 | Side | 1/2 | Bottom | 10 to 250 | External Adjustment Screw | 5 9/16" | 00000000 | 000000 |
| 1 | Side | 350 | 1 | Side | 1 | Bottom | 10 to 250 | External Adjustment Screw | 5 7/8" | 00000000 | 000000 |
Adjustable Pressure-Relief Valves for Chemicals
- For Use With: Aluminum Chloride, Boric Acid
- Temperature Range: 40° to 140° F
Often used with catalysts, pH buffers, and electroplating solutions, these valves have a PVC body and an EPDM seal for excellent chemical resistance. 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 have a port for attaching a pressure gauge.
For technical drawings and 3-D models, click on a part number.
Inlet | Relief Port | Set Pressure | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Location | Maximum Pressure, psi | Pipe Size | Location | Range, psi | Adjustment Method | Overall Ht. | Gauge Port Pipe Size | Each | |
NPT Female Inlet and Relief Port | ||||||||||
Dark Gray PVC Body—EPDM Seal | ||||||||||
| 1/2 | Bottom | 150 | 1/2 | Side | 5 to 75 | External Adjustment Screw | 6 3/4" | 1/4 | 0000000 | 0000000 |
| 3/4 | Bottom | 150 | 3/4 | Side | 5 to 75 | External Adjustment Screw | 6 7/8" | 1/4 | 0000000 | 000000 |
| 1 | Bottom | 150 | 1 | Side | 5 to 75 | External Adjustment Screw | 8 3/4" | 1/4 | 0000000 | 000000 |
| 1 1/2 | Bottom | 150 | 1 1/2 | Side | 5 to 75 | External Adjustment Screw | 13 1/4" | 1/4 | 0000000 | 000000 |
| 2 | Bottom | 150 | 2 | Side | 5 to 75 | External Adjustment Screw | 15 1/2" | 1/4 | 0000000 | 00000000 |
Pressure-Regulating Valves for Chemicals
- For Use With: Chemicals
- Temperature Range:
Polypropylene Body: 35° to 180° F
PVC Body: 40° to 140° F
A plastic body and fluoroelastomer seal stand up to harsh chemicals. These valves automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range.
For technical drawings and 3-D models, click on a part number.
Inlet | Outlet | |||||||
|---|---|---|---|---|---|---|---|---|
| Pipe Size | Location | Max. Pressure, psi | Pipe Size | Location | Pressure Range, psi | End-to-End Lg. | Each | |
NPT Female | ||||||||
PVC Body—Fluoroelastomer Seal | ||||||||
| 1/2 | Side | 125 | 1/2 | Side | 10 to 80 | 3" | 00000000 | 0000000 |
| 3/4 | Side | 125 | 3/4 | Side | 10 to 80 | 3 15/16" | 00000000 | 000000 |
| 1 | Side | 125 | 1 | Side | 10 to 80 | 3 15/16" | 00000000 | 000000 |
| 1 1/2 | Side | 125 | 1 1/2 | Side | 10 to 80 | 6 1/8" | 00000000 | 000000 |
| 2 | Side | 125 | 2 | Side | 10 to 80 | 6" | 00000000 | 00000000 |
Corrosion-Resistant Remote-Discharge Air-Release Valves for Water
For excellent corrosion resistance in wet conditions and harsh environments, these valves have no metal parts. They eliminate air pockets to maintain consistent flow and prevent water surges that can damage equipment. All have a threaded relief port that can be attached to a drain line for remote discharge.
Inlet | Relief Port | |||||||
|---|---|---|---|---|---|---|---|---|
| Pipe Size | Location | Pipe Size | Location | Max. Pressure, psi | Temperature Range, °F | Overall Ht. | Each | |
NPT Female Inlet and Relief Port | ||||||||
PVC Body | ||||||||
| 1/2 | Bottom | 1/2 | Top | 150 | 32° to 140° | 3" | 00000000 | 000000 |
| 3/4 | Bottom | 3/4 | Top | 150 | 32° to 140° | 3 1/2" | 00000000 | 000000 |
| 1 | Bottom | 1 | Top | 150 | 32° to 140° | 3 7/8" | 00000000 | 00000 |
| 1 1/4 | Bottom | 1 1/4 | Top | 150 | 32° to 140° | 4 1/2" | 00000000 | 000000 |
| 2 | Bottom | 2 | Top | 150 | 32° to 140° | 5 3/4" | 00000000 | 000000 |