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Technical Information - Fig. 119

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).

Dimensions (mm)

Valve Size 80 100 150 200
'A' 292 356 445 600
'B' 105 140 165 205
'C' 160 160 260 355

Specifications

Connections Flanged
Working Pressure Up to 5000 kPa
Ratio's Available 5:1, 4:1, 3:1, 2:1
Temperature Range (nitrile seals) -10oC - 100oC
Temperature Range (viton seals) -10oC - 130oC

Materials

Item Description Material
15 Body Studs and Nuts SS
14 Upper Spindle Nut SS
13 Piston SS
12 Cover CI
11 Cover 'O' Rings Nitrile
10 Liner 'O' Ring Nitrile
9 Piston 'U' Seal Nitrile
8 Spindle U Seal Nitrile
7 Liner SS
6 Spindle SS
5 Seating 'O' Ring Nitrile
4 Retaining Disc SS
3 Lower Spindle Nut SS
2 Valve Seat SS
1 Body CI