Hattersley valves help to simplify commissioning
Hattersley’s new range of modern and compact differential-pressure control valves (DPCVs) have features that save cost, reduce energy consumption and simplify installation. Part of the FlowMaster range of commissioning valves, the F400 and R400 are quick and easy to install, have a long life and require little or no maintenance. Available in sizes DN15 to DN50, they are PN16 rated and have a differential-pressure range of 20 to 100 kPa.
Threaded female ends reduce the need for additional adapters in most circuits and make for easy connections to other pipework solutions when adaptors are required. Another feature is the addition of two bosses for test points so readings can be taken from before and after the control circuit.
The pressure is linked to the upper and lower chambers, and the diaphragm, which separates the chambers and pressures, controls the rubber-seated piston to stabilise the pressure differential. The piston closes the valve on rising differential pressure and opens it on falling differential pressure. The valve will continue to move in this way until equilibrium of pressure is achieved.
Pump energy consumption can be reduced in a variable-flow system by 60 to 70% according to BSRIA figures.
DPCVs also simplify balancing and commissioning, enabling commissioning to be carried out in sections rather than the entire system at one time.