Technical Information - Fig. 119

The Fig 119 Ratio Pressure Reducing Valve employs a globe type body, is self contained and hydraulically actuated and controlled.

The valve automatically controls the downstream pressure to a ratio of the upstream pressure ( eg. 5:1).

Operation:

The upstream pressure (P1) is introduced below the valve disc, which is opposed to atmospheric pressure via a vent port above the inlet balancing piston.

The downstream pressure (P2) is introduced above the control piston, which is sized to a fixed ratio of the area of the valve disc, and also opposed to atmospheric pressure via the vent port.

The valve will then modulate the flow to maintain a fixed relationship (eg. 5:1) between P1 and P2, governed by the ratio of the respective areas of the valve disc and the control piston.

The Fig 119 Ratio Pressure Reducing Valve employs a globe type body, is self contained and hydraulically actuated and controlled.

The valve automatically controls the downstream pressure to a ratio of the upstream pressure ( eg. 5:1).