Self-contained Systems

Self-contained Actuators are used in remote locations power supplies are not available, typically small wellhead applications but can be equally useful in any remote location where there is a risk of explosion or environmental damage from spillage.

Each unit is pumped open using the integral manual override pump, then latches in position (with spring compressed) waiting for a process upset to be sensed. Once a signal is received the unit will spring to the fail safe (normally closed) position and will not open until manually pumped back to the set position.

Our range of Self-contained Actuators includes heavy duty scotch yoke (rotary) and heavy duty linear cylinder. We can provide a wide range of options as shown below


  • Double Acting (DA)
  • Spring Return (SR)
  • Torque range – up to 20,000NM
  • Thrust range – up to 10KN
  • Supply – from hand pump
  • low temperature versions to -60C
  • Approvals – CE, ATEX, SIL4, GOST, InMetro, Kosha, Nepsi, CSA/UL
  • Painting – Epoxy paint to customer or project specification
  • Accessories – see Component supply
  • Automation systems – see Automation systems

Additional Services

  • Automation system design using CAD
  • Design and supply of valve to actuator adaption kits
  • Supply of complete assembled and tested automated Valves
  • Fitting of automation assembly to free-issue Valves
  • Fitting and Testing of customer supplied components (engineering and labour only)
  • Training on or off site