[146] 2-way flow control valve (1)
Flow control valves have
the task of providing constant volumetric flow independently of
pressure changes at the inlet or outlet of the valve. This is
achieved firstly by means of an adjustable restrictor which is
set to the desired volumetric flow. In order to keep the pressure
drop across the throttle point constant, a second regulating
restrictor (pressure compensator) is also required. The
illustration shows the valve in its normal position.
2-way flow control valves always operate in conjunction with a pressure relief valve. The part of the flow which is not required is discharged via the PRV.