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10
1
pressure chamber in front of injector
2
injector
3
ball
4
detergent connection
5
spring
6
high-pressure outlet
Unit function
Detergent injector with non-return valve
Detergent can only be taken in if the changeover
nozzle on the spray lance is set at "CHEM“.
The pressure in the system thereby drops to
approx. 50 bar and the injector generates its
maximum low pressure (approx. 0.8 bar).
The ball (3) of the detergent non-return valve is
lifted out of its seat and detergent is taken in.
With high-pressure operation, the ball of the
non-return valve seals off the detergent connec-
tion, thus preventing any water from flowing into
the detergent tank. With high-pressure operati-
on, no detergent can be taken in.
Summary of Contents for HD 1090
Page 1: ...HD 1090 Service Handbook 0 I 5 905 212 03 02...
Page 4: ...2 Unit function Equipment 10 15 12 9 10 13 11 14 16 1 8 2 3 4 5 6 7 0 I...
Page 6: ...4 Unit function Functional diagram 5 3 7 8 9 10 11 12 13 14 2 1 15 16 17 4 6...
Page 8: ...6 Unit function Pump 15 17 18 10 12 13 11 14 16 20 9 12 11 1 8 2 3 4 5 6 7 11 19 21...
Page 10: ...8 Unit function Pressure and flow control with the Servopress handgun 1 2 4 3...
Page 14: ...12 Unit function Handgun with pressure and flow control Servopress with low effort version...