DN20 pneumatic stop valve

ZSC-403R DN20 pneumatic two way stop valve

ZMC or ZSC type pneumatic two-position stop valve, which belongs to the pneumatic actuator category. It cuts off or switches media (air, water and steam) according to the signal of regulating instrument to meet the requirements of process parameters such as pressure, temperature and flow.
Working Principle
ZSQ-402 / 3R  pneumatic two-position stop valve, there are two parts :  pneumatic piston actuator  and the stop valve.
When no signal is input, the actuator closes the valve spool due to the spring preload, when 0.35MPa air signal pressure, the piston push the stem, down action, so that the valve spool off the lower seat, the flow of media within the pipeline can be switched or cut off.