Matching Flow Diagrams to Replace an Air Directional Control Valve
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Choosing an Air Directional Control Valve
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Input-Selecting Air Directional Control Valves
Also known as shuttle valves and "or" valves, these valves select between the higher of two inlet pressures to power one outlet port. They're often used in emergency systems where the lower pressure input acts as a backup to the higher pressure input.
Flow coefficient (Cv) is a measurement that indicates how much airflow can pass through a valve.
Overall | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Flow Ports | For Inlet Tube OD | For Outlet Tube OD | Max. Flow Rate, scfm @ 100 psi | Flow Coefficient (Cv) | Pressure Range, psi | Vacuum Rating | Lg. | Wd. | Ht. | Mount Type | Each | |
Push-to-Connect Female Inlet × Push-to-Connect Female Outlet | ||||||||||||
| 3 | 5/32" | 5/32" | 27.12 | 0.48 | 0-125 | Not Rated | 1 5/8" | 5/8" | 1 1/8" | Inline | 3084N11 | 000000 |
| 3 | 1/4" | 1/4" | 27.12 | 0.48 | 0-125 | Not Rated | 1 5/8" | 5/8" | 1 1/8" | Inline | 3084N12 | 00000 |
Dual-Input Air Directional Control Valves
Air pressure must be supplied to both inlets before the output port will open, allowing airflow to your equipment. When the two input flows have different pressure levels, the output airflow will always be the lower of the two input pressures. Also known as "and" valves.
Flow coefficient (Cv) is a measurement that indicates how much airflow can pass through a valve.
Overall | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Flow Ports | Inlet Size | Outlet Size | Max. Flow Rate, scfm @ 100 psi | Flow Coefficient (Cv) | Pressure Range, psi | Vacuum Rating | Lg. | Wd. | Ht. | Mount Type | Mounting Fasteners Included | Mounting Hole Dia. | Each | |
Threaded Female Inlet × Threaded Female Outlet | ||||||||||||||
| 3 | 1/8 BSPP | 1/8 BSPP | 7.34 | 0.13 | 15-145 | Not Rated | 1 9/16" | 5/8" | 1 1/4" | Screw In | No | 0.18" | 3084N131 | 000000 |
High Airflow Shut-Off On/Off Valves
Also known as air fuses, these valves close automatically to stop airflow when air volume exceeds the shut-off flow rate. They have NPTF (Dryseal) threads that are compatible with NPT threads.
Flow coefficient (Cv) is a measurement that indicates how much airflow can pass through a valve.
Flow Rate @100 psi | Overall | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Inlet Pipe Size  | Outlet Pipe Size | Flow Coefficient (Cv) | Shut-Off Flow Rate | Min. | Max. | Max. Pressure, psi | Temp. Range, °F | Lg. | Ht. | Each | |
NPTF Female Inlet × NPTF Female Outlet | |||||||||||
Brass Body | |||||||||||
| 1/4 | 1/4 | 2.2 | 20 scfm @ 100 psi | 1 scfm | 20 scfm | 250 | 10° to 200° | 2 3/16" | 3/4" | 5000K71 | 000000 |
| 3/8 | 3/8 | 3.6 | 50 scfm @ 100 psi | 1 scfm | 50 scfm | 250 | 10° to 200° | 2 1/2" | 7/8" | 5000K72 | 00000 |
| 1/2 | 1/2 | 6.7 | 80 scfm @ 100 psi | 1 scfm | 80 scfm | 250 | 10° to 200° | 3 1/8" | 1 1/16" | 5000K82 | 000000 |
| 3/4 | 3/4 | 11.6 | 130 scfm @ 100 psi | 1 scfm | 130 scfm | 250 | 10° to 200° | 3 11/16" | 1 3/8" | 5000K84 | 000000 |
| 1 | 1 | 17.5 | 210 scfm @ 100 psi | 1 scfm | 210 scfm | 250 | 10° to 200° | 4 5/8" | 1 3/4" | 5000K86 | 000000 |
Air Signal On/Off Valves
When system pressure reaches the maximum, these valves open and send an air signal to turn on a downstream device such as a discharge valve or throttle. They close and send a signal to turn the device off when pressure drops.
Pressure, psi | Overall | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Inlet Pipe Size | Outlet Pipe Size | Min | Max. | Temp. Range, °F | Lg. | Wd. | Ht. | Ball Material | Each | |
NPT Female Inlet × NPT Female Outlet | ||||||||||
Brass Body | ||||||||||
| 1/4 | 1/8 | 95 | 125 | -15° to 400° | 1 13/16" | 15/16" | 3 1/2" | Stainless Steel | 2740N12 | 000000 |
| 1/4 | 1/8 | 145 | 175 | -15° to 400° | 1 13/16" | 15/16" | 3 1/2" | Stainless Steel | 2740N11 | 00000 |
| 3/8 | 1/4 | 95 | 125 | -15° to 400° | 1 1/2" | 3/8" | 5 1/4" | Stainless Steel | 2740N13 | 000000 |