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The pneumatic proportional valve produces outlet pressure in proportion to an electrical command
input signal. It comprises a complete closed loop servo system consisting of valves, manifold,
housing and electronic controls.

Double_loop:
The servo valve expands in single loop operation by combining an additional feedback from an
external sensing device with the internal transducer. The external sensor provides information
on the control status. The PQ2 then compares the command signal with the second loop feedback
signal.

Should there be a difference in the signal comparisons, the servo valve will make adjustments to
the internal loop to bring the system into balance. This provides accurate final outlet.
The acceptance of electrical feedback from an external sensor enables precise control of
conditions such as pressure, force, torque, position or flow.

External_pressure_transducer:
An auxiliary electrical receptacle is integrated into the device for external feedback.
If using PQ2 in conjunction with a volume booster, AirCom pressure transducers are ideal for
the second loop feedback signal.