Nothing works better for such situations than a driver-operated dump valve. Flip a switch, down go the air bags. A manual (“pilot-operated,” as it’s often called) dump valve is simple to ...

e.g., automated versus manual test execution, spurious trip potential, and on-line maintainability; the advantages and disadvantages of three basic types of partial stroke test methods: mechanical ...

The EA 21 actuator complements the modular and flexible 546 Series valve, providing a system approach ... The EA 21 has an integrated emergency manual override and automatic voltage and frequency ...

However, there are real valves that work in a similar fashion. It is known as an actuated valve, or a pilot controlled valve. Typically a valve would be either electrically actuated or ...

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 ...