Products - Pressure Control - Hydraulic Actuator
Fluid Conservations ControlMate range of Pressure Reducing Valve (PRV) controllers are supplied with a Hydraulic Actuator. This device is used as the interface between the electronic controller and the hydaulic PRV. The availibilty of the Hydraulic Actuator eliminates two of the main technical weaknesses associated with the use of "bias" chambers (or dual chamber pilots in older controllers). Firstly, it is no longer necessary to use a so called MRA (a small pressure regulator) to generate an intermediate pressure to carry out a 2 point control function. Secondly, using the Hydraulic Actuator with its built-in mechanical minimum setting, there is no longer the possiblilty of valve closure due to electronics failure, operator error, leakage of the MRA, etc...
- Manually set pressure settings
- Easy to install
- Adapts to different manufacturers' pilots
- Ensures smooth control of PRV
- Mechanical design
The Hydraulic Actuator is fitted in place of the adjusting screw of the standard pilot of the PRV. To adjust the PRV outlet, the ControlMate progressively extends or retracts the moving "rod" of the actuator in small steps under closed loop control.
The moving rod exerts a force on the pilot's spring in a similar manner to that of the adjusting screw in a standard PRV installation. The main PRV outlet follows its pilot valve setting, controlling the Actuator's moving rod.
This leads to very acurate and repeatable control of the PRV outlet pressure. |
