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 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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Flow-Control Mufflers
Adjust the flow by turning the screw. Use these mufflers with air-powered tools and cylinders to reduce noise and filter exhaust fumes.
For mufflers with an external hex drive, twist the screw and then tighten the hex nut with a wrench to secure. These mufflers are more secure than those with a thumb screw.
For mufflers with a thumb screw, twist the screw and friction secures them in place—no need to use a wrench. Often used in valve exhaust ports, these mufflers are not as secure as those with a nut.
Brass, bronze, and nylon mufflers offer good corrosion resistance.
Stainless steel mufflers offer excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
| Pipe Size  | Thread Size | Max. Flow Rate | Max. Pressure, psi | Max. Temp., °F | Ht. | For Use With | Removes Particle Size Down To, microns | Noise Reduction Rating, dB | Features | Each | |
NPT Male Brass Fitting | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/8 | __ | 20 scfm @ 100 psi | 300 | 300° | 1 5/16" | Air, Inert Gas | 40 | 17-20 | Adjustable Airflow | 0000000 | 00000 |
| 1/8 | __ | 30 scfm @ 100 psi | 300 | 300° | 1 9/16" | Air, Inert Gas | 40 | 17-20 | Adjustable Airflow | 0000000 | 0000 |
| 1/4 | __ | 30 scfm @ 100 psi | 300 | 300° | 1 9/16" | Air, Inert Gas | 40 | 17-20 | Adjustable Airflow | 0000000 | 0000 |
| 1/4 | __ | 40 scfm @ 100 psi | 300 | 300° | 1 5/8" | Air, Inert Gas | 40 | 17-20 | Adjustable Airflow | 0000000 | 0000 |
| 3/8 | __ | 40 scfm @ 100 psi | 300 | 300° | 1 5/8" | Air, Inert Gas | 40 | 17-20 | Adjustable Airflow | 0000000 | 0000 |
| 3/8 | __ | 60 scfm @ 100 psi | 300 | 300° | 2" | Air, Inert Gas | 40 | 17-20 | Adjustable Airflow | 0000000 | 00000 |
| 1/2 | __ | 60 scfm @ 100 psi | 300 | 300° | 2" | Air, Inert Gas | 40 | 17-20 | Adjustable Airflow | 0000000 | 00000 |
| 1/2 | __ | 70 scfm @ 100 psi | 300 | 300° | 2 3/8" | Air, Inert Gas | 40 | 17-20 | Adjustable Airflow | 0000000 | 00000 |
| 3/4 | __ | 70 scfm @ 100 psi | 300 | 300° | 2 3/8" | Air, Inert Gas | 40 | 17-20 | Adjustable Airflow | 0000000 | 00000 |
| 1 | __ | 100 scfm @ 100 psi | 300 | 300° | 2 1/2" | Air, Inert Gas | 40 | 17-20 | Adjustable Airflow | 0000000 | 00000 |
NPT Male 316 Stainless Steel Fitting | |||||||||||
| 1/8 | __ | 12 scfm @ 100 psi | 300 | 390° | 1 1/4" | Air, Inert Gas | 70 | Not Rated | Adjustable Airflow | 0000000 | 00000 |
| 1/4 | __ | 25 scfm @ 100 psi | 300 | 390° | 1 9/16" | Air, Inert Gas | 70 | Not Rated | Adjustable Airflow | 0000000 | 00000 |
| 3/8 | __ | 30 scfm @ 100 psi | 300 | 390° | 1 5/8" | Air, Inert Gas | 70 | Not Rated | Adjustable Airflow | 0000000 | 00000 |
| 1/2 | __ | 50 scfm @ 100 psi | 300 | 390° | 1 15/16" | Air, Inert Gas | 70 | Not Rated | Adjustable Airflow | 0000000 | 00000 |
| 3/4 | __ | 70 scfm @ 100 psi | 300 | 390° | 2 1/4" | Air, Inert Gas | 70 | Not Rated | Adjustable Airflow | 0000000 | 00000 |
| 1 | __ | 100 scfm @ 100 psi | 300 | 390° | 2 3/8" | Air, Inert Gas | 70 | Not Rated | Adjustable Airflow | 0000000 | 00000 |
BSPP Male Nylon Plastic Fitting | |||||||||||
| 1/8 | __ | 51 scfm @ 100 psi | 145 | 210° | 13/16" | Air, Inert Gas | 75 | 10-20 | Adjustable Airflow | 0000000 | 0000 |
| 1/4 | __ | 99 scfm @ 100 psi | 145 | 210° | 1 3/16" | Air, Inert Gas | 75 | 10-20 | Adjustable Airflow | 0000000 | 00000 |
| 3/8 | __ | 170 scfm @ 100 psi | 145 | 210° | 1 1/2" | Air, Inert Gas | 75 | 10-20 | Adjustable Airflow | 0000000 | 00000 |
Metric Male Nylon Plastic Fitting | |||||||||||
| __ | M5 | 19 scfm @ 100 psi | 145 | 210° | 5/8" | Air, Inert Gas | 75 | 10-20 | Adjustable Airflow | 0000000 | 0000 |
| Pipe Size | Max. Flow Rate | Max. Pressure, psi | Max. Temp., °F | Ht. | For Use With | Removes Particle Size Down To, microns | Noise Reduction Rating, dBA | Features | Each | |
NPT Male Bronze Fitting | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1/8 | 6 scfm @ 100 psi | 215 | 570° | 1 1/16" | Air, Inert Gas | 35 | 17-20 | Adjustable Airflow, Friction Lock | 0000000 | 00000 |
| 1/8 | 6 scfm @ 100 psi | 215 | 570° | 1 3/8" | Air, Inert Gas | 35 | 17-20 | Adjustable Airflow, Friction Lock | 0000000 | 0000 |
| 1/4 | 9 scfm @ 100 psi | 215 | 570° | 1 3/16" | Air, Inert Gas | 35 | 17-20 | Adjustable Airflow, Friction Lock | 0000000 | 0000 |
| 1/4 | 9 scfm @ 100 psi | 215 | 570° | 1 9/16" | Air, Inert Gas | 35 | 17-20 | Adjustable Airflow, Friction Lock | 0000000 | 0000 |
Clog-Resistant Mufflers
Replace your muffler less often—these have a filter design that stays clean longer than porous mufflers. They’re often used in air-powered circuits to reduce noise and filter exhaust fumes.
Style A has a screw on top to adjust air flow.
For technical drawings and 3-D models, click on a part number.
Air-Exhaust Flow Control Valves
Install these valves in the exhaust ports of air directional control valves to control exhaust air speed without needing access to your cylinder. They control flow in one direction as air moves from the inlet to the exhaust port (meter out). Air flows freely in the opposite direction. Valves exhaust to the atmosphere and include a muffler to reduce the exhaust noise.
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 | Inlet Size | Max. Flow Rate, scfm @ 100 psi | Flow Coefficient (Cv) | Max. Pressure, psi | Body Material | Hex Size | Dia. | Lg. | Each | |
Threaded Male Inlet | ||||||||||
Dial Flow Adjustment Mechanism | ||||||||||
| 2 | 1/8 BSPP | 35 | 1.016 | 145 | Aluminum | __ | 16mm | 46mm | 0000000 | 000000 |
| 2 | 1/4 BSPP | 52.5 | 1.524 | 145 | Aluminum | __ | 19.5mm | 63.3mm | 0000000 | 00000 |
| 2 | 3/8 BSPP | 59.5 | 1.728 | 145 | Aluminum | __ | 25mm | 95.3mm | 0000000 | 00000 |
| 2 | 1/2 BSPP | 141.26 | 2.982 | 145 | Aluminum | __ | 28mm | 130mm | 00000000 | 00000 |
| 2 | 3/4 BSPP | 268.39 | 5.965 | 145 | Aluminum | __ | 38mm | 157mm | 00000000 | 00000 |
Slotted Screw Flow Adjustment Mechanism | ||||||||||
| 2 | 1/8 NPT | 19.21 | 0.52 | 145 | Aluminum | 9/16" | 5/8" | 1 5/16" | 0000000 | 00000 |
| 2 | 1/8 BSPP | 19.21 | 0.52 | 145 | Aluminum | 14mm | 15mm | 27mm | 00000000 | 00000 |
| 2 | 1/4 NPT | 37 | 1 | 145 | Aluminum | 11/16" | 3/4" | 1 5/8" | 0000000 | 00000 |
| 2 | 1/4 BSPP | 37 | 1 | 145 | Aluminum | 17mm | 18.2mm | 32.1mm | 00000000 | 00000 |
| 2 | 3/8 NPT | 74 | 2 | 145 | Aluminum | 7/8" | 1" | 1 15/16" | 0000000 | 00000 |
| 2 | 3/8 BSPP | 74 | 2 | 145 | Aluminum | 22mm | 25mm | 41.1mm | 00000000 | 00000 |
| 2 | 1/2 NPT | 133.2 | 3.6 | 145 | Aluminum | 1 1/16" | 1 1/16" | 2 1/4" | 0000000 | 00000 |
| 2 | 1/2 BSPP | 133.2 | 3.6 | 145 | Aluminum | 24mm | 27mm | 44.6mm | 00000000 | 00000 |
Thumb Screw Flow Adjustment Mechanism | ||||||||||
| 2 | 1/8 BSPT | 10.59 | 0.201 | 145 | Brass | 10mm | 14mm | 35.8mm | 00000000 | 00000 |
| 2 | 1/4 BSPT | 17.66 | 0.313 | 145 | Brass | 14mm | 18mm | 37mm | 00000000 | 00000 |
| 2 | M5 Metric | 3.35 | 0.06 | 145 | Brass | 8mm | 10mm | 23.4mm | 00000000 | 00000 |
| 2 | M7 Metric | 4.24 | 0.075 | 145 | Brass | 8mm | 10mm | 26.9mm | 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 |
Made-to-Order Air-Operated Air-Exhaust Control Valves
When these valves receive an air signal, they quickly dump exhaust air to the atmosphere without routing it back through a directional control valve to speed up the movement of equipment. They're often used with air compressors that require continuous operation. A muffler reduces exhaust noise. Also known as quick exhaust valves.
To Order: Specify minimum pressure and maximum pressure from the ranges listed. The difference between the minimum pressure and maximum pressure must be at least 10 psi, but no more than 30 psi.
Overall | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Flow Ports | Inlet Size | For Outlet Tube ID | Air Pilot Size | Max. Flow Rate, scfm @ 100 psi | Flow Coefficient (Cv) | Body Material | Lg. | Wd. | Ht. | Choose a Pressure Range Min. | Choose a Pressure Range Max. | Each | |
Threaded Female Inlet × Barbed Male Outlet × Threaded Male Air Pilot | |||||||||||||
| 4 | 1/8 NPT | 1/4" | 1/4 NPT | 20 | Not Rated | Brass | 2 7/8" | 2 1/16" | 3 3/8" | 40 to 240 psi in 1 psi increments | 50 to 250 psi in 1 psi increments | 0000000 | 000000 |