English 5.906-246.0 Rev. 01 (09/14) 17
Trigger gun and servopress rotary regulator opened:
When the power press regulator is opened all the way, the
water flows from the pressure room through the pressure
holding valve via the control pressure injector to the high
pressure outlet.
The ball of the overflow valve is pressed onto the valve
seat by the pump pressure and thus seals the connecting
boring to the suction chamber.
The manometer displays the working pressure in the pres-
sure room.
But, due to the affect of the control pressure injector, there
is less pressure in the connecting boring.
6.3.2 HD 7/18-4, HD 9/19
1 Manometer
2 Pressure holding valve
3 Pressure room with pressure valves
4 Pressure switch Q2
5 Connecting boring to overflow valve
6 Overflow valve ball
7 Connecting boring to suction room
8 Piston rod
9 Connecting boring from the overflow valve
to the control pressure injector
10 Detergent injector
11 High pressure outlet
12 Control pressure injector
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