Matching Flow Diagrams to Replace an Air Directional Control Valve
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Choosing an Air Directional Control Valve
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About Pressure-Relief Valves
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About Flow Control Valves
Also known as cylinder speed controls, flow control valves let you control the extension or retraction speed of your air cylinder. They regulate airflow as it passes from the valve's inlet to its outlet. Air flows freely in the opposite direction.
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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.
Nylon valves have better corrosion resistance than steel valves. They are color coded based on the set pressure for easy identification.
For technical drawings and 3-D models, click on a part number.
Pressure-Relief Valves with Push-to-Connect Fittings for Air
- For Use With: Air
- Temperature Range: 26° to 255° F
For a low-pressure seal around plastic and soft metal tubing, these valves have push-to-connect fittings. They allow inline flow from the inlet to the outlet during normal conditions and divert flow to the relief port in overpressure conditions. 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. The vented relief port exhausts discharge directly. Set pressure is not adjustable. Valves are color coded based on the set pressure for easy identification.
For technical drawings and 3-D models, click on a part number.
Inlet | Outlet | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | Location | Maximum Pressure | For Tube OD | Location | Relief Port Location | Overall Ht. | Choose a Set Pressure, psi | Each | |
Push-to-Connect Female Inlet, Outlet and Relief Vent | |||||||||
Nylon Body—Buna-N Seal | |||||||||
| 1/4" | Side | Not Rated | 1/4" | Side | Top | 1 1/4" | 0000000 | 000000 | |
| 5/16" | Side | Not Rated | 5/16" | Side | Top | 1 5/16" | 0000000 | 00000 | |
| 3/8" | Side | Not Rated | 3/8" | Side | Top | 1 1/2" | 0000000 | 00000 | |
| 1/2" | Side | Not Rated | 1/2" | Side | Top | 1 3/4" | 0000000 | 00000 | |
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 | 00000000 |
| 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 |
Plastic Panel-Mount Pressure-Regulating Valves for Water
- For Use With: Water
- Temperature Range: 40° to 150° F
For easy panel mounting in your water system, these valves have threads below the adjustment knob and come with a panel-mount nut. They automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range. Body is polysulfone, which is lightweight and corrosion resistant.
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/EPDM Diaphragm and Polyurethane Seal | |||||||||||
| 1/8 | __ | Side | 150 | 1/8 | __ | Side | 1 9/16" | 9/16" | 00000000 | 000000 | |
UNF Female | |||||||||||
Polysulfone Body—Buna-N/EPDM Diaphragm and Polyurethane Seal | |||||||||||
| __ | 10-32 | Side | 150 | __ | 10-32 | Side | 1 1/8" | 9/16" | 00000000 | 00000 | |
Plastic Panel-Mount Pressure-Regulating Valves for Air
- For Use With: Air
- Temperature Range: 40° to 150° F
Regulate pressure in air and inert gas systems from your instrument panel—these valves have threads below the adjustment knob and come with a panel-mount nut. All automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range. Body is polysulfone, which is lightweight and corrosion resistant.
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/EPDM Diaphragm and Polyurethane Seal | |||||||||||
| 1/8 | __ | Side | 150 | 1/8 | __ | Side | 1 9/16" | 9/16" | 00000000 | 000000 | |
UNF Female | |||||||||||
Polysulfone Body—Buna-N/EPDM Diaphragm and Polyurethane Seal | |||||||||||
| __ | 10-32 | Side | 150 | __ | 10-32 | Side | 1 1/8" | 9/16" | 00000000 | 00000 | |
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.
Polypropylene valves withstand higher temperatures than PVC valves.
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 | ||||||||
Polypropylene 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 |
PVC Body—Fluoroelastomer Seal | ||||||||
| 1/2 | Side | 125 | 1/2 | Side | 10 to 80 | 3" | 00000000 | 000000 |
| 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 | 00000000 |
| 2 | Side | 125 | 2 | Side | 10 to 80 | 6" | 00000000 | 00000000 |
Pressure-Regulating Valves with Compression Fittings for Food and Beverage
- For Use With: Food and Beverage
- Temperature Range: 35° to 125° F
Compression fittings bite down on hard metal and plastic tubing for a tighter seal than push-to-connect fittings. These valves automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range. The Buna-N/stainless steel diaphragm and EPDM seal are FDA compliant 21 CFR 177.2600.
For technical drawings and 3-D models, click on a part number.
Inlet | Outlet | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | Location | Max. Pressure, psi | For Tube OD | Location | Pressure Adjustment Method | End-to-End Lg. | Specifications Met | Choose an Outlet Pressure Range, psi | Each | |
Compression Female | ||||||||||
Acetal Body—Buna-N/Stainless Steel Diaphragm and EPDM Seal | ||||||||||
| 1/4" | Side | 250 | 1/4" | Side | Knob | 2" | FDA Compliant 21 CFR 177.2600 | 0000000 | 0000000 | |
Threaded Pressure-Regulating Valves for Food and Beverage
- For Use With: Food and Beverage
- Temperature Range: 35° to 125° F
These valves are often used to regulate pressure in food and beverage lines. They automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range. Valves have two gauge ports and come with plugs to close the unused ports.
Valves with knob have a Buna-N/Nylon diaphragm which is FDA Compliant 21 CFR 177.2600.
For technical drawings and 3-D models, click on a part number.
Inlet | Outlet | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Location | Max. Pressure, psi | Pipe Size | Location | Pressure Adjustment Method | End-to-End Lg. | Specifications Met | Choose an Outlet Pressure Range, psi | Each | |
NPT Female | ||||||||||
Acetal Body—Buna-N/Nylon Diaphragm and EPDM Seal with Knob | ||||||||||
| 1/4 | Side | 150 | 1/4 | Side | Knob | 1 5/8" | FDA Compliant 21 CFR 177.2600, NSF/ANSI 61 | 0000000 | 000000 | |
Noryl PPO Body—Buna-N Diaphragm and Seal with Screw | ||||||||||
| 1/4 | Side | 300 | 1/4 | Side | Screw | 1 9/16" | NSF/ANSI 61 | 0000000 | 000000 | |
Pressure-Regulating Valves with Push-to-Connect Fittings for Food and Beverage
- For Use With: Food and Beverage
- Temperature Range: 35° to 125° F
Insert plastic or soft metal tubing into the push-to-connect fittings on these valves for a low-pressure seal in food and beverage lines. They automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range. They have two gauge ports.
For technical drawings and 3-D models, click on a part number.
Inlet | Outlet | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Tube Connection Type | For Tube OD | Location | Max. Pressure, psi | For Tube OD | Location | Pressure Adjustment Method | End-to-End Length | Specifications Met | Choose an Outlet Pressure Range, psi | Each | |
Push-to-Connect Female | |||||||||||
Noryl PPO Body—Buna-N Diaphragm and Seal | |||||||||||
| Push to Connect | 1/4" | Side | 300 | 1/4" | Side | Screw | 2 13/16" | NSF/ANSI 61 | 0000000 | 0000000 | |
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 | |
Plastic Panel-Mount Vacuum-Regulating Valves for Air and Inert Gas
- For Use With: Air, Inert Gas
- Temperature Range: 40° to 150° F
A lighter and more corrosion-resistant alternative to metal valves. All valves throttle a high vacuum source to maintain a lower vacuum level in your system. Adjust the outlet vacuum level within the range. Threads below the adjustment knob and an included panel-mount nut let you add these valves to your instrument panel. All are constant-bleed style, so they continually release small amounts of process gas to improve accuracy and repeatability.
For technical drawings and 3-D models, click on a part number.
Inlet | Outlet | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Thread Size | Location | Pipe Size | Thread Size | Location | Vacuum Range, in. of Hg | Vacuum Adjustment Method | End-to-End Lg. | Panel Cutout Dia. | Each | |
NPT Female | |||||||||||
Polysulfone Body—Buna-N/EPDM Diaphragm and Polyurethane Seal | |||||||||||
| 1/8 | __ | Side | 1/8 | __ | Side | 0 to 30 | Knob | 1 9/16" | 9/16" | 00000000 | 000000 |
UNF Female | |||||||||||
Polysulfone Body—Buna-N/EPDM Diaphragm and Polyurethane Seal | |||||||||||
| __ | 10-32 | Side | __ | 10-32 | Side | 0 to 30 | Knob | 1 1/8" | 9/16" | 00000000 | 00000 |
Elbow Air-Exhaust Control Valves with Flow Control
Control the flow of exhaust air while also regulating the exhaust air speed. These valves dump exhaust air to the atmosphere without routing it back through a directional control valve. They control flow in one direction as air flows from the inlet to the outlet, and adjust the volume of exhaust air exiting an air cylinder (meter out) to control its speed. Air flows freely in the opposite direction. They have a 90° elbow shape that allows you to install them in tight spaces. The push-to-connect inlet port is for use with plastic or soft metal tubing; insert tubing into the port. A muffler reduces exhaust noise. Also known as quick exhaust valves.
Flow coefficient (Cv) is a measurement that indicates how much airflow can pass through a valve. When selecting between valves with the same port size, choose the valve with the higher flow coefficient to ensure it provides enough airflow to operate your system.
For technical drawings and 3-D models, click on a part number.
Overall | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Flow Ports | For Inlet Tube OD | Outlet Pipe Size | Outlet Thread Type | For Outlet Tube OD | Max. Flow Rate, scfm @ 100 psi | Flow Coefficient (Cv) | Pressure Range, psi | Body Material | Lg. | Wd. | Ht. | Each | |
Push to Connect Female Inlet × Threaded Male Outlet | |||||||||||||
| 3 | 1/4" | 1/4 | NPT | 1/4" | 14.05 | 0.44 | 14-145 | PBT Plastic | 2 7/8" | 11/16" | 1 1/8" | 00000000 | 000000 |
| 3 | 1/4" | 1/8 | NPT | 1/4" | 14.05 | 0.44 | 14-145 | PBT Plastic | 2 7/8" | 11/16" | 1 1/16" | 00000000 | 00000 |
| 3 | 5/16" | 1/4 | NPT | 5/16" | 24.91 | 0.78 | 14-145 | PBT Plastic | 3 1/4" | 15/16" | 1 3/8" | 00000000 | 00000 |
| 3 | 5/16" | 1/8 | NPT | 5/16" | 24.91 | 0.78 | 14-145 | PBT Plastic | 2 7/8" | 15/16" | 1 3/16" | 00000000 | 00000 |
| 3 | 5/16" | 3/8 | NPT | 5/16" | 24.91 | 0.78 | 14-145 | PBT Plastic | 3 1/4" | 15/16" | 1 1/8" | 00000000 | 00000 |
| 3 | 3/8" | 1/2 | NPT | 3/8" | 51.09 | 1.6 | 14-145 | PBT Plastic | 3 9/16" | 1 3/16" | 1 5/8" | 00000000 | 00000 |
| 3 | 3/8" | 1/4 | NPT | 3/8" | 24.91 | 0.78 | 14-145 | PBT Plastic | 3 3/8" | 15/16" | 1 5/8" | 00000000 | 00000 |
| 3 | 3/8" | 1/4 | NPT | 3/8" | 47.89 | 1.5 | 14-145 | PBT Plastic | 3 9/16" | 15/16" | 1 5/8" | 00000000 | 00000 |
| 3 | 3/8" | 1/8 | NPT | 3/8" | 24.91 | 0.78 | 14-145 | PBT Plastic | 3 3/8" | 15/16" | 1 5/16" | 00000000 | 00000 |
| 3 | 3/8" | 3/8 | NPT | 3/8" | 24.91 | 0.78 | 14-145 | PBT Plastic | 3 3/8" | 15/16" | 1 5/16" | 00000000 | 00000 |
| 3 | 3/8" | 3/8 | NPT | 3/8" | 51.09 | 1.6 | 14-145 | PBT Plastic | 3 9/16" | 1 3/16" | 1 3/4" | 00000000 | 00000 |
Quiet Air-Exhaust Control Valves
A muffler on these valves reduces exhaust noise. They allow airflow into your equipment and then quickly vent exhaust air to the atmosphere without routing it back through a directional control valve to speed up the movement of equipment. Also known as quick exhaust valves.
Flow coefficient (Cv) is a measurement that indicates how much airflow can pass through a valve. When selecting between valves with the same port size, choose the valve with the higher flow coefficient to ensure it provides enough airflow to operate your system.
Overall | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Flow Ports | For Inlet Tube OD | For Outlet Tube OD | Maximum Flow Rate | Flow Coefficient (Cv) | Pressure Range, psi | Body Material | Lg. | Wd. | Ht. | Each | |
Push-to-Connect Female Inlet × Push-to-Connect Female Outlet | |||||||||||
| 3 | 1/4" | 1/4" | 11.36 scfm @ 100 psi | 0.8 | 14-145 | PBT Plastic | 2" | 1/2" | 3/4" | 0000000 | 000000 |
| 3 | 1/4" | 1/4" | 6.82 scfm @ 100 psi | 0.54 | 14-145 | PBT Plastic | 1 5/8" | 1/2" | 5/8" | 0000000 | 00000 |
| 3 | 4mm | 4mm | 4.47 scfm @ 100 psi | 0.14 | 14-145 | PBT Plastic | 39.7mm | 10mm | 14.3mm | 0000000 | 00000 |
| 3 | 6mm | 6mm | 11.36 scfm @ 100 psi | 0.8 | 14-145 | PBT Plastic | 44.5mm | 11.6mm | 19mm | 0000000 | 00000 |
| 3 | 6mm | 6mm | 4.79 scfm @ 100 psi | 0.15 | 14-145 | PBT Plastic | 41.3mm | 11.6mm | 15.9mm | 0000000 | 00000 |