ZPB－11/21 is one of the actuator accessories, used with pneumatic diaphragm actuator and piston pneumatic actuator. When air system does not work, it can automatically cut off the Intake and exhaust channels of pneumatic actuator,  make it keep the position when it does not work, ensure it can work normally.

Structure principle

It is designed according to force balance principle. Made up of adjustment screw, locking nut, adjust spring, consumption pores, diaphragm, the signal pressure membrane chamber, valve body, diaphragm, valve, valve spring, the next film room as well as the housings, the upper and lower body