Valve Positioner stroke accurately by 4~20mA current signal being input from controller.It change the current signal into air pressure to contorl the pneumaitc actuator ,so as to control the opening of the valve. This product is convenient to change between direct action and back action, or change between spring return and double acting. It has the features of low air consumption, easy to operate the Zero Adjust and Span Adjust,quick acting and simple to connect the Feedback Lever. we have also produced P-P valve positioner series,including two types. The Linear one is used for pneumatic linear valve actuator. The rotary one is used for rotary pneumatic actuator. They control valve stroke accurately, through pressure air, according to input air signal of 3-15psi being input from electrical-pneumatic converter.

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