Pneumatic valve actuator P1/R1

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Multi-spring diaphragm pneumatic actuators type P1/R1 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 P1 reverse action (air – reverses the stem) – type R1 simple operation, with manual drive – type P1B reverse action, with manual drive – type R1B Position accuracy - ±2.5% of nominal stroke range Hysteresis - ±2.5 % of nominal stroke range Manual drive - side Number of cycles - min. 250,000 cycles - standard execution, min. 1,000,000 cycles - special execution total reversibility of operation and possibility of changing the range of springs – without additional parts rigid construction of cast yoke actuator wide range of available forces linear dependence of stem displacement on control pressure due to the use of diaphragms with a fixed active surface different spring ranges obtained by changing the number of springs and/or by changing the position of spacer elements possibility of equipping the actuator with a manual side drive, pneumatic or electro-pneumatic positioner, limit switches, filter reducer, three-way electro-pneumatic valve, blocking valve position transmitter long service life of diaphragms, springs and seals low weight and overall dimensions