HD 1050 Unit function
7
9. Function with Servopress hand gun
fully open
Adjustment of the flow and pressure is effected
bei setting the Servopress hand gun.
Relief valve closed
With the Servopress hand gun fully open, the
full delivery of the pump is fed at standard
working pressure by way of the high-pressure
outlet to the spray lance.
10. Function with Servopress hand gun
partly closed
Relief valve partialy opened.
Partial circulation operation. lf the Servopress
hand gun is partialy closed, the pressure
generated by the pump and the pressure in the
pressure channel increases. The piston with
piston pin then partialy opens the sealing
surface between the ball and valve seat.
This causes part of the flow from the pump to be
fed back to the suction side and so the pressure
at the nozzle of the spray lance is reduced.
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