FeaturesThe WBA208 uses a pneumatic input signal to accurately control output pressure based on a predetermined ratio.A balanced Supply Valve minimizes the effects of supply pressure variation.An Aspirator Tube compensates downstream pressure droop under flowing conditions.Optional Fixed Negative Bias allows operation with pneumatic devices that cannot be adjusted to zero input pressure.A separate Control Chamber isolates the diaphragm from the main flow to eliminate hunting and buzzing.Unit construction allows servicing without removal.