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Above: A pinch valve actuated by shape memory alloy (SMA) wires to open and seal a tube for industrial applications. Shape Memory Alloys (SMAs) are metals that deform when heated and return to their ...

• Standard solenoid valves pose an ignition danger near hazardous materials. • Valves with pneumatic and magnetic actuators require no electricity, making them inherently safe in hazardous locations.

A new group of air-actuated electrical switches from Clippard Instrument Laboratory, Cincinnati, is suited for applications where pneumatics must remotely pilot electrical switches. The pressure ...