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The multi-spring membrane pneumatic actuators of P/R type are applied for control operation of control valves
and other positioning elements in industrial automatic systems.
There are three following design options of the actuator:
– direct action (air – ejects the stem) – type P,
– reverse action (air – retracts the stem) – type R,
– direct action, handwheel – type PN,
– reverse action, handwheel – type RN
| Nominal sizes | DN25 ; 40 ; 50 ; 80 ; 100 ; 150 ; 200 ; 250 ; 300 ; 400 ; 450 |
| Nominal pressure | • PN10 ; 16 ; 25 ; 40 ; 63 • CL150 ; CL300 |
| Flow ratios | 3 ... 2160 m3/h |
| Plug characteristics and type | linear, equal percentage |
| Rangeability | 50:1 |
| Leakage class | - basic: class IV as per PN-EN 60534-4 - blister: class VI as per PN-EN 60534-4 |
| Temperature range | - 40 ... + 80°C |
| Body material | carbon cast steel GP 240 GH, WCB carbon cast steel for low temperatures G20Mn5 acid-resistant cast steel GX5CrNiMo, CF8M |
- completely reversible action, option to change spring range w/o extra parts,
- actuator mounted on the columns
- wide range of the available forces
- linear relationship between rod displacement and control pressure as a result of using membranes with constant active area
- various ranges of spring pressures due to changeability of spring number and /or dislocation of distance fencers
- capability of the actuator o incorporate side-mounted handwheel, pneumatic or electro-pneumatic positioners, limit switches, air sets, three-way pneumatic solenoid valves, lockup valves, position transducers
- possibility to equip with accessories allowing to decrease or increase distortion time
- high strength of diaphragms, springs and packings
- small size and weight
We can adjust the control valve according to your individual needs. In such cases, please contact our technical support specialist.