Heavy Duty Scotch Yoke hydraulic actuator, symmetrical and inclined, with motion from 0 to 90°.

  • Power supply: filtered hydraulic oil.
  • Double and stop adjustments, open and closed position: 0 ± 5° 90 ± 5°.
  • Torque Output (DA): 1875 to 300000 Nm (at 100 bar), 15302 to 2655224 in/lbs (at 1500 psi)
  • Torque Output (SR): 360 to 107520 Nm (at 100 bar), 15302 to 951632 in/lbs (at 1500 psi)
  • Temperature: standard -30 to +100°C (-22 to + 212°F), high -20 to +150°C (-4 to +302°F), low -55 to +80°C (-67 to +176°F)
  • Welded steel, epoxy powder coated, red (RAL 3020) or according to customer requirements.
  • Interface: ISO 5211 / DIN3337 and NAMUR valves, VDI / VDE3845 and NAMUR top mounted accessories

Technical data

Technical data


  • Made of welded carbon steel.
  • Bidirectional double-stop adjustments with integrated adjustment, which allow adjustment from 85° to 95°. Modulated and subjected to a pressurized area for safe operation.
  • Actuator made of welded steel, equipped with two self-lubricating bronze bearings to improve alignment.
  • Steel pin, equipped with bearings with two guide bushes to ensure symmetrical motion. Two chromed steel bars guide the actuator during travel across the steel carriage.

Hydraulic cylinder

  • Made of carbon steel.
  • Fully welded for better pressure resistance.
  • Maximum pressure 210 bar.
  • Double Acting (DA) available in single or double cylinder.

Spring cylinder

  • The spring is located inside the steel cylinder.
  • The spring is sized with respect to the oil supply pressure.
  • The spring cylinder is welded to the flange fixed to the central body.
  • The design allows the cylinder to be completely removed with the compressed spring safely inside.

Surface treatments

  • Actuator and carriage are phosphate-plated;
  • The entire external surface of the actuator is sandblasted and coated with epoxy powder, RAL3020 as per standard, another color on request.

Areas of expertise

Case history

Case history

TEG Bulbuceni

Valves mounted in the wrong position Sector: Oil & Gas Customer: Petrom (OVM group) Location: Romania Products: Heavy duty spring return pneumatic actuators. Problem During the construction of the plant, two valves were mounted in the wrong position, the positions of one normally open and one normally closed were reversed by the company that carried… (continue)