WinGD W-X82 - Page 389

Operation
5562−1/A1
Winterthur Gas & Diesel Ltd.
3/ 3
2. Functions
2.1 Control Function
Oil pressure on the piston (8, Fig. 2) pushes the valve tip (7) down on to the valve
seat (6). The fuel pressure also operates against the axial slide valve (5). When the
fuel pressure increases, the oil pressure decreases. If the oil pressure decreases
below a specified threshold value, the valve tip (7) moves up from the valve seat (6)
and fuel is drained.
The compression springs (3, 4) and the knurled screw (1) give the control position of
the axial slide valve (5).
2.2 Function Check
During operation, carefully turn the knurled screw (1) counterclockwise until the axial
slide valve (5) starts to open. When the axial slide valve functions correctly, fuel
pressure is released.
2.3 Emergency Stop Function
If the fuel shut-down pilot valve (10) is energized the oil pressure above the piston (8)
is released, the valve tip (7) moves away from the valve seat (6) and fuel is drained.
FO
10
9
WCH00763
FI
OI
1
2
3
4
5
6
8
7
OIL
FUEL
Fig. 2: Fuel pressure control valve 3.0
6
1 Knurled screw 8 Piston
2 Adjusting disc 9 Filter
3 Compression spring 10 Fuel shut-down pilot valve 3.08
4 Compression spring
5 Axial slide valve FO Fuel outlet (drain)
6 Valve seat FI Fuel inlet
7 Valve tip OI Oil inlet
2014
Pressure Control Valve