3/2-way limit valve, idle return roller ball-bearing, G 1/4", 700 l/min, aluminium

Pneumatic feed and transfer units have to detect an end position reliably even where no electrical signal is available. This 3/2-way limit valve handles that task purely mechanically and releases a pilot pressure of up to 8 bar when actuated. Its flow rate of 700 l/min is sufficient to drive downstream directional valves or small cylinders directly. Because the roller is an idle return type, the valve switches in one direction of travel only and stays silent on the return stroke. All three ports are threaded G 1/4" and the pressure inlet may be connected to any of them.

Advantages

• Ball-bearing steel roller keeps wear on the cam track low in continuous cycling.
• Actuating force of only 20 N, so a light ramp on the slide is enough to trip the valve.
• Flow rate of 700 l/min across an operating pressure range of 0 to 8 bar.
• Aluminium body with a POM spool and NBR seals, matched to oiled and non-oiled compressed air.
• Temperature range of -10 to +60 °C for workshop, machine room and assembly fixture use.
• Pressure inlet can be placed at any of the three G 1/4" ports, which simplifies the piping layout.

Applications

• End position sensing on pneumatic feed slides in assembly fixtures.
• Cycle control of feeding units where only the forward stroke may produce a signal.
• Pilot control of downstream directional valves without any electrical wiring.
• Purely pneumatic sequencing of simple handling devices up to 8 bar.