Pneumatic valves switch to piezo actuation
Hoerbiger-Origa has updated its pneumatic switching and regulating valves with several new versions added to the existing range; pilot-operated, in-line and manifold directional control, and NAMUR Interface.
The range is actuated by a new P8 piezo pneumatic pilot valve, which offers a number of advantages over conventional solenoid control. Switching power requirements are minimal and unlike a solenoid the switch is bi-stable, so needs far less power to hold it in position. This makes it ideal for explosion hazard environments in which any equipment capable of sparking is forbidden. The range is compatible with most leading interface modules (isolating amplifiers and barriers) and offers particular benefits for Ex fieldbus systems.
The piezo unit is far smaller and lighter than a solenoid and generates almost no waste heat and magnetic radiation. Switching time of the piezo element is effectively instantaneous which provides the pilot valve with an excellent response and with few moving parts exceptional reliability is ensured. The valves are available in 3/2 way, 5/2 way, 5/3 way mono-stable and bi-stable versions, with flow from 50 litres/min (P8) to 1300litres/min (G1/4) and pressures up to 8 bar. They are usable with both compressed air and nitrogen and in temperatures from -25 to +60degC.
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