Solenoid Valve for Pneumatic Actuators, NAMUR Direct Mount

A solenoid valve for pneumatic actuators is the pilot valve that turns an electrical signal into actuator movement. It bolts directly onto the top of a quarter-turn pneumatic actuator through the NAMUR interface: the actuator carries the standard bolt pattern and the two air ports machined into its body, so the solenoid sits flat on it with no fittings and no tubing in between. Every pneumatic actuator we make has a NAMUR interface, and so do most rack-and-pinion actuators from other makers, which is why one solenoid covers both our own packages and retrofits.

The 4V310-08B comes in two functions, and the choice depends only on your actuator. A double acting actuator has two air ports and both need feeding, so it takes the 5/2 way valve, which pressurises one side while venting the other. A spring return actuator takes air on one port and lets the spring do the return stroke, so it takes the 3/2 way valve. This is the most common ordering mistake in pneumatic valve packages; if you are not sure which actuator you have, send us the model and we will tell you which function it needs.

The air connection is G1/4 and the supply pressure is 4 to 8 bar, the same range as our pneumatic actuators. The coil is available in 24V DC, 110V AC or 220V AC and is rated IP67: dust tight, and able to survive temporary immersion, which is the rating you want on any solenoid mounted outside a control cabinet. A manual override lets you cycle the valve by hand during commissioning, testing, or a power cut.

You can order the solenoid on its own to fit an actuator you already have, or as part of a complete package. When it ships with one of our pneumatic ball valves, the valve, the actuator and the solenoid are assembled and tested together before they leave, so there is nothing to match up on site.