135 Series Micro Flow Control Valve

Function Principle 

Positioner receives 0/4-20mA(0-5/10v) electrical signals from  control system and converts them into air signals to control the  valve and make precise low adjustment using the bellow  adjustable seat. Diaphragm is arranged between the valve body and the bonnet to  isolate the medium in place of the stem packing. Valve stays closed(open) by spring force in its normal state.  When piston is actuated by compressed air, valve becomes  opened (Closed).

Advantages

Bellows are used to isolate the medium and meet the  requirements of harsh working conditions.