Matching Flow Diagrams to Replace an Air Directional Control Valve
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Choosing an Air Directional Control Valve
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Choosing an Electrical Switch
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Two-Hand Safety Switches
Activate these switches with two hands, reducing the risk of accidental equipment start up. A complete system requires a switch and a safety relay.
Switches have an emergency stop push-button to immediately cut power. They are rated IP65 for protection from low-pressure washdowns.
Safety relays control the switches when you push the two buttons within 0.5 seconds of each other. Self-monitoring circuitry shuts down the entire system until repaired if any part of it fails. These relays run on 24V DC but can run on 120V AC with a power supply (not included)
For technical drawings and 3-D models, click on a part number.
Actuator | Mounting | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Circuits Controlled | Switch Starting Position | Switch Action | Industry Designation | Material | Color | Switching Current @ Voltage | Ht. | Wd. | Dp. | No. of Holes | Hole Dia. | Mounting Fasteners Included | Each | |
| 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | Springs Back (Momentary) | DPST-1NO/1NC | Plastic | Black | 8 A @ 250 V AC, 5 A @ 24 V DC | 7 5/16" | 18 1/2" | 5 7/16" | 2 | 29/64" | No | 00000000 | 0000000 |
| Input Voltage | No. of Circuits Controlled | Switch Starting Position | No. of Terminals | Industry Designation | Switching Current @ Voltage | | For DIN Rail Ht., mm | Wire Connection Type | Each | |
| 24V DC | 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | 12 | DPST-1NO/1NC | 5.5 A | 24V DC | 35 | Screw Terminals | 00000000 | 0000000 |
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 |
Two-Hand Single-Action Air Directional Control Valves
Since both hands are required to simultaneously press the buttons, these valves protect workers from accidental machinery start-up. Also known as 2-hand control 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 can be installed normally open to allow airflow until actuated, or installed to block airflow until actuated. Return actuation is by spring, so valves return to their starting position as soon as you release the actuator. These valves actuate any 3 or 4-way air piloted spring return power valve or small single-acting cylinders. 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.
For technical drawings and 3-D models, click on a part number.
Overall | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Actuation Force, oz. | 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. | Mounting Fasteners Included | Each | |
Threaded Female Inlet × Threaded Female Outlet | |||||||||||||
| 6 | 2 | 1/8 NPT | 1/8 NPT | 6 | 0.11 | 70-100 | Not Rated | 10 1/2" | 3 1/2" | 3 3/16" | No | 00000000 | 000000000 |
| 18 | 2 | 1/8 NPT | 1/8 NPT | 6 | 0.11 | 70-100 | Not Rated | 10 1/2" | 3 1/2" | 3 3/16" | No | 00000000 | 00000000 |
Two-Hand Two-Action Air Directional Control Valves
Since both hands are required to simultaneously press the buttons, these valves protect workers from accidental machinery start-up. Also known as 4-way and 4/2 valves, they create two actions, such as extending and then retracting a double-acting cylinder. They direct airflow from the inlet to your equipment and exhaust return airflow to create motion. Return actuation is by spring, so valves return to their original position as soon as you release the actuator.
Flow coefficient (Cv) is a measurement that indicates how much airflow can pass through a valve.
For technical drawings and 3-D models, click on a part number.
Overall | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Actuation Force, oz. | No. of Flow Ports | Inlet Size | For Inlet Tube OD | Outlet Size | For Outlet Tube OD | Exhaust Connection Type | Max. Flow Rate, scfm @ 100 psi | Flow Coefficient (Cv) | Pressure Range, psi | Vacuum Rating | Lg. | Wd. | Ht. | Mounting Fasteners Included | Each | |
Threaded Female Inlet × Threaded Female Outlet | ||||||||||||||||
| 6 | 4 | 1/4 NPTF | 1/4" | 1/4 NPTF | 1/4" | Threaded | 56 | 1 | 70-100 | Not Rated | 10 1/2" | 3 1/2" | 3 3/16" | No | 00000000 | 000000000 |
| 18 | 4 | 1/4 NPTF | 1/4" | 1/4 NPTF | 1/4" | Threaded | 56 | 1 | 70-100 | Not Rated | 10 1/2" | 3 1/2" | 3 3/16" | No | 00000000 | 00000000 |
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.
For technical drawings and 3-D models, click on a part number.
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" | 00000000 | 000000 |