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压力控制阀

更新时间:2016-08-26



PICVs are 3 valves in one:
1、Static Flow limiting valve: the ow of the fully open valve can be adjusted in a range from 30% to 100% by rotating an adjustment knob on the valve or by a dipswitch conguration on the actuator
2、Globe Valve: the ow can be controlled from 0 up to the maximum set ow by moving the valve plug
3、Differential Pressure Controller with the main mission of keeping constant the pressure drop across the valve plug in order to have a ow control independent from the differential pressure

Working principle of a PICV can be described in the sketch below



1、Pressure P1 increases -> Pressure Pm increases -> Membrane Pushes the plug DOWN increasing the overall ow resistance
2、Pressure P1 decreases -> Pressure Pm decrease -> Membrane Pulls the Plug UP decreasing the overall ow resistance

BV valves have a linear Characteristic from DN15 to DN25 and an Equipercentage Characteristic from DN32 to DN150. All the models are characterized by a differential pressure range where the ow is kept constant by the compensation effect of the differential pressure controller integrated into the valve.



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