Scotch Yoke Hydraulic Actuator

RTCH is a range of high torque hydraulic quarter turn actuators with materials selected to withstand the most hostile environmental conditions. They are suitable for all onshore and offshore applications, covering the majority of on-off and modulating valves.

The actuator is designed to provide maximum reliability and flexibility to cover a wide range of valves in all pressure classes.


  • Chromium plated guide bar to absorb transversel forces
  • Designed to provide high torque with minimum space and weight
  • Double acting or spring return compact design
  • Electroless nickel plated cylinder to minimise friction and prevent corrosion
  • Full stainless steel version available
  • Housing is manufactured in carbon steel material without any cast/grey/ductile iron or aluminum parts
  • Integral hand-pump available
  • Power module safety design allows replacement of the cylinder seals without any danger
  • Scotch yoke mechanism available in both canted or symmetrical executions
  • Totally sealed weatherproof housing that provides complete protection for all moving parts

Technical data

Operating pressure

Hydraulic version up to 350 barg

(special version available on request)

Standard operating temperature

-30°C to 100°C

(lower or higher temperature on request)

Output torque

From 40 Nm up to 6.000 Nm

(for double acting version)

Spring Ending Torque

From 40 Nm up to 2.500 Nm

(for single acting version)


PED 2014/68/EU

ATEX 2014/34/EU 

EAC TR TS 012/2011 


IP66/67M according to IEC/EN 60529 

SIL3 certified (IEC 61508) as a “single device”

Designed and tested in accordance with EN 15714-4

(further certifications are available, please contact us for updated list)

Contact us for more information