About Pressure-Relief Valves
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Adjustable Pressure-Relief Valves for Water
- For Use With: Water
- Temperature Range: -30° to 160° F
Alter the set pressure to suit your application. These valves begin opening at the set pressure and fully open at about 10% over the set pressure. Tighten the locknut to prevent accidental changes in set pressure. Valves should not be used in applications that require the valve to close completely below the set pressure.
For technical drawings and 3-D models, click on a part number.
Valves | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Inlet | Relief Port | Set Pressure | Repair Kits | |||||||
| Pipe Size  | Location | Pipe Size | Location | Range, psi | Adjustment Method | Overall Ht. | Each | Each | ||
NPT Male Inlet and NPT Female Relief Port | ||||||||||
Brass Body—Buna-N Seal | ||||||||||
| 1/4 | Bottom | 1/4 | Side | 0 to 50 | T-Handle | 4" | 00000000 | 0000000 | 000000 | 00 |
| 1/4 | Bottom | 1/4 | Side | 0 to 150 | T-Handle | 4" | 00000000 | 000000 | 000000 | 00 |
| 1/4 | Bottom | 1/4 | Side | 0 to 300 | T-Handle | 4" | 00000000 | 000000 | 000000 | 00 |
| 1/4 | Bottom | 1/4 | Side | 0 to 700 | T-Handle | 4" | 00000000 | 000000 | 000000 | 00 |
| 1/4 | Bottom | 1/4 | Side | 0 to 1,000 | T-Handle | 4" | 0000000 | 000000 | 000000 | 00 |
| 3/8 | Bottom | 3/8 | Side | 0 to 150 | T-Handle | 4" | 00000000 | 000000 | 000000 | 00 |
| 3/8 | Bottom | 3/8 | Side | 0 to 300 | T-Handle | 4" | 00000000 | 000000 | 000000 | 00 |
| 3/8 | Bottom | 3/8 | Side | 0 to 700 | T-Handle | 4" | 00000000 | 000000 | 000000 | 00 |
| 3/8 | Bottom | 3/8 | Side | 0 to 1,000 | T-Handle | 4" | 0000000 | 000000 | 000000 | 00 |
| 3/8 | Bottom | 3/8 | Side | 0 to 1,200 | T-Handle | 4" | 0000000 | 000000 | 000000 | 00 |
| 1/2 | Bottom | 1/2 | Side | 0 to 50 | T-Handle | 6 5/8" | 0000000 | 00000 | 0000000 | 000000 |
| 1/2 | Bottom | 1/2 | Side | 0 to 300 | T-Handle | 6 5/8" | 0000000 | 00000 | 0000000 | 00000 |
| 1/2 | Bottom | 1/2 | Side | 0 to 700 | T-Handle | 6 5/8" | 0000000 | 00000 | 0000000 | 00000 |
| 1/2 | Bottom | 1/2 | Side | 0 to 1,200 | T-Handle | 6 5/8" | 0000000 | 000000 | 0000000 | 00000 |
| 3/4 | Bottom | 3/4 | Side | 0 to 50 | T-Handle | 6 5/8" | 0000000 | 00000 | 0000000 | 00000 |
| 3/4 | Bottom | 3/4 | Side | 0 to 300 | T-Handle | 6 5/8" | 0000000 | 00000 | 0000000 | 00000 |
| 3/4 | Bottom | 3/4 | Side | 0 to 700 | T-Handle | 6 5/8" | 0000000 | 00000 | 0000000 | 00000 |
| 3/4 | Bottom | 3/4 | Side | 0 to 1,200 | T-Handle | 6 5/8" | 0000000 | 000000 | 0000000 | 00000 |
Precision-Adjustment Pressure-Relief Valves for Water
- For Use With: Water
- Temperature Range: 33° to 200° F
Change set pressure without guesswork—the adjustment screw is marked in 25 psi increments for making pressure adjustments without a gauge. These valves are commonly used with thermal-expansion protection systems and low-capacity pumps. 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.
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 | Set Pressure | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Location | Maximum Pressure, psi | Pipe Size | Location | Range, psi | Adjustment Increment, psi | Adjustment Method | Overall Ht. | Each | |
NPT Male Inlet and NPT Female Relief Port | ||||||||||
Brass Body—Silicone Seal | ||||||||||
| 1/2 | Bottom | 220 | 1/2 | Side | 25 to 175 | 25 | External Adjustment Screw | 4 1/8" | 0000000 | 000000 |
| 3/4 | Bottom | 220 | 3/4 | Side | 25 to 175 | 25 | External Adjustment Screw | 4 1/8" | 0000000 | 00000 |
Bronze Body—Silicone Seal | ||||||||||
| 1/2 | Bottom | 175 | 1/2 | Side | 50 to 175 | 25 | External Adjustment Screw | 3 7/16" | 0000000 | 00000 |
| 3/4 | Bottom | 175 | 1/2 | Side | 50 to 175 | 25 | External Adjustment Screw | 3 7/16" | 0000000 | 00000 |
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 | |
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 | 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 | 00000000 |
| 2 | Bottom | 150 | 2 | Side | 5 to 75 | External Adjustment Screw | 15 1/2" | 1/4 | 0000000 | 00000000 |
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 |
Pressure-Relief Valves for Oil
- For Use With: Oil
- Temperature Range: -320° to 420° F
These valves are often used in hydraulic and lubrication systems. 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.
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 | |||||||||
Bronze Body—316 Stainless Steel Seal | |||||||||
| 1/2 | Bottom | 1,400 | 3/4 | Side | External Adjustment Screw | 7 1/4" | 0000000 | 0000000 | |
| 3/4 | Bottom | 1,400 | 3/4 | Side | External Adjustment Screw | 7 1/4" | 0000000 | 000000 | |
| 1 | Bottom | 1,400 | 1 | Side | External Adjustment Screw | 7 1/2" | 0000000 | 000000 | |
| 1 1/4 | Bottom | 1,400 | 1 1/4 | Side | External Adjustment Screw | 8" | 0000000 | 000000 | |
| 1 1/2 | Bottom | 1,400 | 1 1/2 | Side | External Adjustment Screw | 8 7/8" | 0000000 | 00000000 | |
Back-Pressure-Regulating Valves for Air and Inert Gas
- For Use With: Air, Inert Gas
- Temperature Range: 0° to 150° F
Often used to protect equipment running on air compressors, these valves obstruct flow to maintain sufficient operating pressure in your system. If the system pressure exceeds the set pressure, they exhaust through the unthreaded relief port. Adjust the set pressure within the range. Valves have two gauge ports.
For technical drawings and 3-D models, click on a part number.
Inlet | Outlet | Gauge Port | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Location | Max. Pressure, psi | Pipe Size | Location | Pipe Size | Location | End-to-End Lg. | Choose an Outlet Pressure Range, psi | Each | |
NPT Female | ||||||||||
Aluminum Body—Buna-N Diaphragm and Seal | ||||||||||
| 1/4 | Side | 250 | 1/4 | Side | 1/4 | Side | 3" | 0000000 | 0000000 | |
| 3/8 | Side | 250 | 3/8 | Side | 1/4 | Side | 3" | 0000000 | 000000 | |
| 1/2 | Side | 250 | 1/2 | Side | 1/4 | Side | 3" | 0000000 | 000000 | |
Panel-Mount Back-Pressure-Regulating Valves for Air and Inert Gas
- For Use With: Air, Inert Gas
- Temperature Range: 40° to 150° F
Threads below the adjustment knob and an included panel-mount nut allow you to add these valves to your instrument panel. Often used in systems running on air compressors, they're installed after pressure-sensitive equipment to obstruct flow and maintain a consistent operating pressure. If the system pressure exceeds the set pressure, they exhaust through the outlet. Adjust the set pressure within the range.
For technical drawings and 3-D models, click on a part number.
Inlet | Outlet | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Thread Size | Location | Max. Pressure, psi | Pipe Size | Thread Size | Location | End-to-End Lg. | Panel Cutout Dia. | Choose an Outlet Pressure Range, psi | Each | |
NPT Female | |||||||||||
Polysulfone Body—Buna-N Diaphragm and Silicone Seal | |||||||||||
| 1/8 | __ | Side | 100 | 1/8 | __ | Side | 1 1/8" | 9/16" | 00000000 | 000000 | |
UNF Female | |||||||||||
Polysulfone Body—Buna-N Diaphragm and Silicone Seal | |||||||||||
| __ | 10-32 | Side | 100 | __ | 10-32 | Side | 1 1/8" | 9/16" | 00000000 | 00000 | |
Extended-Life Back-Pressure-Regulating Valves for Water and Oil
- For Use With: Water, Oil
- Temperature Range: -40° to 450° F
For a longer service than cast iron valves, these have a durable bronze body and a 303 stainless steel seal. Commonly installed as bypass lines after centrifugal, reciprocating, and rotary pumps, they obstruct flow to maintain sufficient operating pressure in your system. If the system pressure exceeds the set pressure, they exhaust through the outlet. Adjust the set 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 | Port-to-Port Lg. | Choose an Outlet Pressure Range, psi | Each | |
NPT Female | ||||||||
Bronze Body—303 Stainless Steel Seal | ||||||||
| 1/4 | Bottom | 600 | 1/4 | Side | 1 1/4" | 0000000 | 0000000 | |
| 3/8 | Bottom | 600 | 3/8 | Side | 1 1/4" | 0000000 | 000000 | |
| 1/2 | Bottom | 600 | 1/2 | Side | 1 5/8" | 0000000 | 000000 | |
| 3/4 | Bottom | 600 | 3/4 | Side | 1 5/8" | 0000000 | 000000 | |
| 1 | Bottom | 600 | 1 | Side | 2 1/4" | 0000000 | 000000 | |
| 1 1/4 | Bottom | 600 | 1 1/4 | Side | 2 1/4" | 0000000 | 000000 | |
Back-Pressure-Regulating Valves for Water and Oil
- For Use With: Water, Oil
- Temperature Range: -40° to 200° F
Commonly used as bypass lines after centrifugal, reciprocating, and rotary pumps, these valves obstruct flow to maintain sufficient operating pressure in your system. If the system pressure exceeds the set pressure, they exhaust through the threaded relief port. Adjust the set pressure within the range. Valves have a cast iron body that absorbs vibration from pressure changes to reduce wear and noise in your pipeline.
For technical drawings and 3-D models, click on a part number.
Inlet | Outlet | Relief Port | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Location | Max. Pressure, psi | Pipe Size | Location | Pipe Size | Location | End-to-End Lg. | Choose an Outlet Pressure Range, psi | Each | |
NPT Female | ||||||||||
Cast Iron Body—Nickel Alloy Diaphragm and 303 Stainless Steel Seal | ||||||||||
| 1/2 | Side | 400 | 1/2 | Side | 1/2 | Bottom | 2 7/8" | 0000000 | 000000000 | |
| 1 1/4 | Side | 400 | 1 1/4 | Side | 1 1/4 | Bottom | 4 1/4" | 0000000 | 00000000 | |
| 1 1/2 | Side | 400 | 1 1/2 | Side | 1 1/2 | Bottom | 5" | 0000000 | 00000000 | |
| 2 | Side | 400 | 2 | Side | 2 | Bottom | 5" | 0000000 | 00000000 | |
Sanitary Back-Pressure-Regulating Valves
- For Use With: Food and Beverage
- Temperature Range: -40° to 120°F
- Specifications Met: 3-A Certified 64-00, ANSI/FCI 70-2 Class III, FDA Compliant 21 CFR 177.2600
Designed to meet 3-A sanitary standards, these valves regulate liquid, gas, and air pressure in hygienic zones of food and beverage plants. They’re often used at the end of pipelines on processing and sanitizing equipment. Made of 316 stainless steel, they won't corrode from frequent washdowns with harsh cleaners. With an extremely smooth interior that self-drains, bacteria won't have time or space to grow. The spring and internal valve mechanisms are sealed off behind the diaphragm, which also prevents contamination. They connect with quick-clamp fittings, so disassembling to clean your line takes little time.
These valves obstruct flow to maintain sufficient operating pressure in your system. If the system pressure exceeds the set pressure, they exhaust through the outlet. They meet ANSI/FCI 70-2 Class III standards for shut-off valves, meaning a maximum of 0.1% of fluid, gas, or air will escape through the outlet when they’re closed. An integrated T-handle lets you set the outlet pressure without additional tools. The diaphragm and seal resist repeated exposure to water, and they’re FDA compliant for direct contact with food.
For technical drawings and 3-D models, click on a part number.
Inlet | Outlet | Lg. | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | Flange OD | Location | Max. Pressure, psi | For Tube OD | Flange OD | Location | End-to-End | Port-to-Port | Choose an Outlet Pressure Range, psi | Each | |
Quick Clamp | |||||||||||
316 Stainless Steel Body—EPDM Diaphragm and EPDMSeal | |||||||||||
| 3/4" | 0.984" | Side | 200 | 3/4" | 0.984" | Bottom | 6 5/8" | 3 9/32" | 000000 | 000000000 | |
| 1" | 1.984" | Side | 200 | 1" | 1.984" | Bottom | 6 11/16" | 3 5/16" | 000000 | 00000000 | |
316 Stainless Steel Body—PTFE Plastic Diaphragm and EPDMSeal | |||||||||||
| 2" | 2.516" | Side | 100 | 2" | 2.516" | Bottom | 11 5/8" | 5 3/4" | 000000 | 00000000 | |
Easy-Adjust Pressure-Relief Hydraulic Valves
An external nut lets you adjust the pressure without disassembling the valve. 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.
Brass valves have good corrosion resistance. 303 stainless steel valves are more corrosion resistant than brass valves.
For technical drawings and 3-D models, click on a part number.
Inlet Connection | Relief Connection | O'all | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Dash Size | Pipe Size | Dash Size | Lg. | Wd. | Ht. | Temp. Range, °F | Choose a Set Pressure Range, psi | Each | |
NPT Female Inlet and Relief Port | ||||||||||
Brass Body | ||||||||||
| 1/4 | 04 | 1/4 | 04 | 1 11/16" | 1 1/4" | 3 11/16" | -40° to 250° | 0000000 | 0000000 | |
| 1/2 | 08 | 1/2 | 08 | 2 3/8" | 1 3/4" | 5 7/8" | -40° to 250° | 0000000 | 000000 | |
| 3/4 | 12 | 3/4 | 12 | 2 7/16" | 1 3/4" | 5 15/16" | -40° to 250° | 0000000 | 000000 | |
303 Stainless Steel Body | ||||||||||
| 1/2 | 08 | 1/2 | 08 | 2 3/8" | 1 3/4" | 5 7/8" | -40° to 250° | 0000000 | 00000000 | |
| 3/4 | 12 | 3/4 | 12 | 2 7/16" | 1 3/4" | 5 15/16" | -40° to 250° | 0000000 | 00000000 | |
Pressure-Relief Hydraulic Valves
To set the pressure, unscrew the cap and turn the adjustment screw. 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.
Iron valves absorb vibration to reduce noise and wear in the pipeline. 316 stainless steel valves are more corrosion resistant than iron valves.
For technical drawings and 3-D models, click on a part number.
Inlet Connection | Relief Connection | O'all | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Dash Size | Pipe Size | Dash Size | Lg. | Wd. | Ht. | Temp. Range, °F | Choose a Set Pressure Range, psi | Each | |
NPT Female Inlet and NPT Female Relief Port | ||||||||||
Iron Body | ||||||||||
| 3/8 | 06 | 3/8 | 06 | 2 1/16" | 1 3/8" | 5 3/8" | -20° to 400° | 0000000 | 0000000 | |
| 1/2 | 08 | 1/2 | 08 | 2 3/16" | 1 7/16" | 6 3/16" | -20° to 400° | 0000000 | 000000 | |
| 3/4 | 12 | 3/4 | 12 | 2 11/16" | 1 11/16" | 6 15/16" | -20° to 400° | 0000000 | 000000 | |
| 1 | 16 | 1 | 16 | 3 5/16" | 2 1/16" | 8 1/4" | -20° to 400° | 0000000 | 000000 | |
| 1 1/4 | 20 | 1 1/4 | 20 | 3 13/16" | 2 1/2" | 9 9/16" | -20° to 400° | 0000000 | 000000 | |
| 1 1/2 | 24 | 1 1/2 | 24 | 4 1/8" | 2 7/8" | 11 1/16" | -20° to 400° | 0000000 | 000000 | |
| 2 | 32 | 2 | 32 | 4 5/8" | 3 1/4" | 13" | -20° to 400° | 0000000 | 000000 | |
NPT Male Inlet and NPT Female Relief Port | ||||||||||
316 Stainless Steel Body | ||||||||||
| 1/2 | 08 | 1/2 | 08 | 1 5/8" | 1 1/8" | 4 3/16" | 40° to 250° | 0000000 | 000000 | |
Tamper-Resistant Pressure-Relief Hydraulic Valves
The pressure setting on these valves cannot be adjusted while they are installed. Use a hex key to unlock the locknut and turn the adjustment screw to set the pressure. 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.
For technical drawings and 3-D models, click on a part number.
Inlet Connection | Relief Connection | O'all | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Dash Size | Pipe Size | Dash Size | Wd. | Ht. | Temp. Range, °F | Choose a Set Pressure Range, psi | Each | |
NPT Female Inlet and Relief Port | |||||||||
Aluminum Body | |||||||||
| 1/2 | 08 | 1/2 | 08 | 1 1/4" | 5" | -40° to 250° | 0000000 | 0000000 | |
Pressure-Relief Screw-In Hydraulic Valves
Set a specific pressure and these valves will maintain it. Also known as cartridge valves, these compact valves screw into your mounting block. They begin opening at the set pressure and fully open at about 20% over the set pressure. They begin closing as pressure drops and fully close when the system pressure is restored below the set pressure.
For technical drawings and 3-D models, click on a part number.
Body— UN/UNF (SAE Straight) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Deltrol Equivalent Model No. | Hydraforce Equivalent Model No. | Thread Size | Dash Size | Max. Flow Rate, gpm | Max. Pressure, psi | O'all Ht. | Set Pressure Range, psi | Each | |
Anodized Aluminum Body | |||||||||
| DRV2-080-N-K-4 | __ | 3/4"-16 | 08 | 10 | 3,000 | 4" | 100-400 | 0000000 | 000000 |
| DRV2-080-N-K-20 | __ | 3/4"-16 | 08 | 10 | 3,000 | 4" | 300-2,000 | 0000000 | 00000 |
| DRV2-080-N-K-30 | __ | 3/4"-16 | 08 | 10 | 3,000 | 4" | 1,500-3,000 | 0000000 | 00000 |
| DRV-100-N-K-4 | RV10-20A-0-N | 7/8"-14 | 10 | 10 | 3,000 | 4 1/2" | 100-400 | 0000000 | 00000 |
| DRV-100-N-K-20 | RV10-20A-0-N | 7/8"-14 | 10 | 10 | 3,000 | 4 1/2" | 300-2,000 | 0000000 | 00000 |
| DRV-100-N-K-30 | RV10-20A-0-N | 7/8"-14 | 10 | 10 | 3,000 | 4 1/2" | 1,500-3,000 | 0000000 | 00000 |
Pressure-Regulating Inline Hydraulic Valves
When input pressure varies, use these valves to maintain a consistent pressure. They are often placed after a directional-control valve and before an actuator, such as a cylinder. They have an indicator/gauge port for the inlet and one for the outlet so you can monitor that output pressure remains steady.
For technical drawings and 3-D models, click on a part number.
Inlet/Outlet Connection | Relief Connection | O'all | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Dash Size | Pipe Size | Dash Size | Lg. | Wd. | Ht. | Choose a Set Pressure Range, psi | Each | |
NPT Female Inlet and Relief Port | |||||||||
Cast Iron Body | |||||||||
| 3/4 | 12 | 1/4 | 04 | 5 7/8" | 3 3/4" | 7 1/8" | 000000 | 0000000 | |
Pressure-Relief Block-Mount Hydraulic Valves
Set a specific pressure and this valve will maintain it by diverting excess fluid from a pump to a tank. Valve opens at set pressure and closes when pressure drops. Use screws to attach to an NFPA valve-mounting block (each component sold separately).
For technical drawings and 3-D models, click on a part number.
Pressure-Regulating Block-Mount Hydraulic Valves
This valve maintains a consistent pressure in a system when input pressure varies. It is often placed after a directional-control valve and before an actuator, such as a cylinder. Use screws to attach to an NFPA valve-mounting block (each component sold separately).
For technical drawings and 3-D models, click on a part number.