In pneumatic technology, the combination of three gas source processing components of air filter, sanitary pressure relief valve and oil mist device is called pneumatic triplicate, which is equivalent in function to the power transformer in the circuit.
Air filtering and pressure relieving device is light and small, and is easy to install. Therefore, it is equipped with pneumatic transmitter, pneumatic regulator, valve positioner and other products to be used together. If the air filter and pressure relief valve are designed as a whole, they become a duo.
Valve limit switch is a field instrument to detect the status of the valve in a control system. It’s used to output the open and closing position of the valve in the form of switch signal. This product can also be used for valve interlock protection and remote alarm indication in the system.