Repeatable & reliable

Typically, spring pressure in a pilot valve is modulated over a short 1-4mm stroke; this controls the output of the pilot valve, which in turn controls the pipeline pressure. Network pressure can range from 15m to over 90m head.  The characteristic of the Rotork CVL500 actuator enables very accurate control of the network in increments of 0.4m of head pressure.

For the Sydney Water network this is an improvement on the previous coarse control resolution of up to 7m head, just by changing to the Rotork CVL500 actuator. Using a PID control loop, the Rotork CVL500 provides repeatable and reliable ongoing pressure control.