Matching Flow Diagrams to Replace an Air Directional Control Valve
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Choosing an Air Directional Control Valve
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Remote-Location Two-Hand Single-Action Air Directional Control Valves
The push buttons that operate these valves are separate from the logic unit, allowing you to position them away from machinery. Since both hands are required to simultaneously press the buttons, they protect workers from accidental machinery start-up. Also known as 3-way and 3/2 valves, they create one action, such as extending a cylinder. Valves direct airflow from the inlet to your equipment and exhaust return airflow to create motion. They're normally closed to block airflow until actuated. Return actuation is by spring, so valves return to their starting position as soon as you release the actuator. In the off position, they exhaust air from the system, allowing equipment to reset so the action can be repeated.
Note: Valve is sold as a complete unit, consisting of one logic unit and two signal valves. Port size given is for the logic unit. Signal valve port size is 1/8 NPT female.
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 | Exhaust Connection Type | Max. Flow Rate, scfm @ 100 psi | Flow Coefficient (Cv) | Pressure Range, psi | Vacuum Rating | Lg. | Wd. | Ht. | For Panel Cutout Dia. | Mounting Fasteners Included | Each | |
Push-to-Connect Female Inlet × Push-to-Connect Female Outlet | ||||||||||||||
| 3 | 1/4" | 1/4" | Push to Connect | 3.8 | 0.11 | 36-145 | Not Rated | 2 1/2" | 1 3/4" | 2 3/4" | 1 1/8" | No | 0000000 | 0000000 |
Key-Operated Single-Action Air Directional Control Valves
Because they require a key to operate, you can limit who is able to adjust these valves. Also known as 3-way and 3/2 valves, they create one action, such as extending a cylinder. Valves direct airflow from the inlet to your equipment and exhaust return airflow to create motion. They're normally closed to block airflow until actuated. Return actuation is by hand, so they stay actuated and return to their starting position only when you move the actuator again. In the off position, they exhaust air pressure from the system to the atmosphere, allowing equipment to reset so the action can be repeated.
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, in. of Hg | Lg. | Wd. | Ht. | For Panel Cutout Dia. | Mounting Fasteners Included | No. of Keys Included | Each | |
Threaded Female Inlet × Threaded Female Outlet | ||||||||||||||
| 3 | 1/4 NPT | 1/4 NPT | 33.53 | 1.05 | 0-145 | 29.5 | 1 5/8" | 1 5/8" | 4 1/8" | 1 1/8" | No | 2 | 000000 | 000000 |