20
English
5.905-945.0 Rev. 00 (06/15)
Device with hose drum
Function
The bypass valve is to keep the pressure loss at a mini-
mum in high pressure operation.
In high pressure operation, the piston opens against the
spring force of the pressure spring and lets the water flow
to the high pressure outlet via the valve seat. This circum-
vents the nozzle insert. No detergent is suctioned and the
pressure loss remains low.
In low pressure operation, the pressure spring presses the
piston onto the valve seat and closes the water flow. The
entire water volume flows through the nozzle insert and the
detergent is suctioned via the adapter.
6.8
Bypass valve
1
2
3
5
4
6
7
8
9
11
10
12
13
14
B
A
C
Position Description
Nm
1
Detergent fitting
12 - 15
2
Sphere
3
Screw spring
4
Screwed sealing plug
15 - 17
5
Nozzle insert
1,5 - 2,5
6
Valve seat
7
Node piece
8
Liner, replaceable
9
O ring
10
Support ring
11
Piston
12
Valve bolt
13
Hexagonal screw
25 - 30
14
Pressure spring
A
High pressure input
B
High-pressure outlet
C
Detergent inlet