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Proportional control valve
High pressure proportional control valve LHP3E

For stepless (infinitely variable) capacity control of diesel compressors:

Both proportional controller types LHP3E and LHP3N are designed to govern capacity control devices of compressors, speed control devices of engines, bleed valves, and bypass valves.


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Details Introduction

Operation

Types LHP3E and LHP3N applied as proportional controllers: The pressure at inlet E is transformed directly to an analogue pneumatic signal at outlet A. Within the control band  of the controller this signal is proportional to an increasing or decreasingpressureatinletE.

Types LHP3E give a rising control signal at A on increasing pressureatE(positive acting or directacting-seediagram1).Types LHP3N  give a rising control  signal at A on decreasing pressureatE(negativeacting or inverseacting-seediagram2).

Types LHP3E applied as small relief valve or signal pressure limitator:

The controller nozzle opens steplessly,if the pressure at inlet E exceeds the set point.

The amount of air vented via the outlet A is proportional to the increasing pressure at inlet E.

Types LHP3E applied as proportional controller plus bleedvalve:Some executions of direct acting controllers may be used for both stepless capacity control and zero load bypass on small or medium sized compressors.


Adjustmeng

The set point is adjusted by turning the hand wheel

* to a higher pressure: clockwise

* to a lower pressure: counterclockwise


Ordering details

Type、nozzle(0.8、1.0、1.2、2.0)


Proportional band (control band):

increase:  install an outlet nozzle with larger diameter

decrease: install an outlet nozzle with smaller diameter


Technical parameters

     

                   高压正比例阀 LHP3E                         高压反比例阀 LHP3N

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