• Polski
  • English
  • Deutsch
  • Русский


Multi-spring diaphragm pneumatic actuators type P/R - POLNA S.A.

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

Diaphragm area250, 400, 630, 2x630, 1000, 1500, 2x1500 cm2
Stroke20, 38, 50, 63, 80, 100 mm
Spring ranges20 ...100 kPa do 180 ... 380 kPa
Operating temperature- 40 ... + 80°C
Position accuracy±2.5% of nominal stroke range
Hysteresis±2% of nominal stroke range
Manual drivetop
Maximum pressure600 kPa
Number of cyclesmin. 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
  • 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.
We can adjust the actuator to your individual needs. In such cases, please contact our technical support specialist.


ul. Obozowa 23 Str
37-700 Przemyśl

TEL: +48 16 678 66 01
E-MAIL: sekretariat@polna.com.pl

KRS: NATIONAL COURT REGISTER: 0000090173 dated 12.02.2002 r. Provincial Court in Rzeszów, XII Division of National Court Register
COMPANY ID: 650009986     NIP: 795-020-07-05     BDO: 000030128
SHARE CAPITAL: 3.710.992,60 PLN
PAID CAPITAL: 3.710.992,60 PLN
BANK ACCOUNT NUMBER: 88 1030 1250 0000 0000 8901 4018 EUR SWIFT: CITIPLPX