Plant operations, when performed incorrectly, can have catastrophic consequences in safety-critical industries. To mitigate the effects of human error, valve interlocking systems are widely employed in risk management strategies, forming an important component of process safety. A valve interlocking system ensures a predetermined sequence of valve operations can be achieved by using a “trapped key” principle.

Available in quarter-turn and multi-turn versions, valve interlocks are designed to suit all types of valves and can be fitted to the valve without needing hot work or modification to the host valve. When used with other Sofis interlocks, operators are compelled to follow the correct sequence of operation of all valves and equipment within the interlock sequence.

Given the diverse applications interlocks can be used for, as part of HAZOP or design reviews, we can help define and review the sequence and create the interlock specifications.

Flexible remote valve operators - flexidrive

FlexiDrive is a flexible, cable-driven valve actuator system. It has two stations, joined by a unique, patented, linear drive cable. It enables valves and other wheel-operated devices in remote, hard-to-reach or hazardous locations to be operated easily from a conveniently located handwheel.

Developed to operate valves in inaccessible locations, FlexiDrive can be applied to any conventional wheel-operated valve/device, in oil, gas and chemical processing plants, or any other industrial application. It is suitable for underwater use and will function reliably in all climatic conditions.


  • Operate hard-to-reach valves
    • From a safe location
    • From up to 30 metres away
    • In dangerous areas
    • Through walls
    • Under water
  • No scaffolding required
  • Avoid hazards, including working at heights, confined spaces and hard-to-access areas


EasiDrive is an efficient, cost-effective alternative to a dedicated valve actuator. Wherever you have manually operated valves that have high-operating torques, hundreds of handwheel turns to open/close or are difficult to operate, EasiDrive is your ideal solution.

EasiDrive is fully portable and banks of valves can be managed with a single tool. Pneumatic, electric and hydraulic ‘drive guns’ are available.


The Power Wrench is a pneumatic tool to assist with the operation of high-torque, high-turn valves. The portable actuator reduces valve operating time by up to 80% and improves efficiency when operating manual valves. 

Easy to install

Install the drive plate with u-bolts, connect the Power Wrench portable actuator to an air supply and you are ready to go!

With the Power Wrench portable actuator you can work more efficiently during plant shutdowns and maintenance. Put the tool to work in your plant within minutes and limit the time spent on operating manual valves. The Power Wrench is Ex certified and ready for use in Zone 1 classified areas.

Operation of the Power Wrench portable actuator is safe. You are in complete control over the applied force and various safety measures protect you during operation. The throttle allows for a controlled build-up of torque and speed and the safety lever and throttle valve enforce ‘2-hands operation’.



  • Operational safety – complete control over the applied force as well as various safety measures to protect you during operation
  • Control – the throttle enables a controlled build-up of torque and speed, and the safety lever and throttle valve enforce ‘2-hands operation’
  • Reduce injuries – minimise strain or injury from operating high-torque valves
  • Ex certified – ready for use in Zone 1 classified areas 
For more information about any of these products, call 1300 TEKSAL or email