Electro-pneumatic valve actuator P/R

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Multi-spring diaphragm pneumatic actuators type P/R are used as control devices for control of control valves and other setting elements in industrial automation. They are made in the following varieties: simple action (air – stem extension) – type P reverse action (air – reverses the stem) – type R simple action, with manual drive – type PN reverse action, with manual drive – type RN total reversibility of operation and possibility of changing the range of springs, without additional parts The actuator is mounted on columns, wide range of available forces and working strokes, linear dependence of stem displacement on control pressure due to the use of diaphragms with a fixed active surface, possibility to obtain different spring ranges by changing the number of springs and/or by changing the position of spacer elements, possibility to equip the actuator with manual upper drive, pneumatic or electro-pneumatic positioner, filter-regulator, solenoid valve, limit switches, position transmitter, locking valve, volume booster, possibility to use equipment allowing to reduce or increase overdrive times, long service life of diaphragms, springs and seals, low weight and overall dimensions.