EBW’s Model 664 Pressure Regulator Valve was designed
to be used in conjunction with suction type dispensers connected to
an aboveground storage tank. The pressure regulator valve prevents
fuel from flowing to the pumping unit and flowing out the vent tube
of the self-contained dispenser when the pump is not activated. The
pressure regulator valve is a vacuum actuated valve which will not
allow product flow until the suction of the pumping unit opens the
valve allowing the product to flow to the dispenser. The valve will
close by means of an internal spring when pumping is completed.
