Pressure And Volume Regulation - Kärcher HDS 7/12 M Service Manual

6.27 Pressure and volume regulation

1 Connection trigger gun
2 Connecting pin
3 Ceramic disc on gun side
4 Ceramic disc on spray pipe side
5 Casing of rotating regulator
6 Handle of rotary regulator
7 Spray lance connection
The pressure and volume regulation is designed as a rota-
ry regulator between the trigger gun and the spray lance.
There are two ceramic discs within the high pressure chan-
nel.
A ceramic disc is rigidly connected with the connection of
the trigger gun. The other ceramic disc is connected to the
rotating regulator and therefore adjustable. Offset holes in
the ceramic discs can adjust the flow volume and the pres-
sure when rotating the discs.
This illustration shows the two overlapping ceramic discs
and the water flow (blue) with different opening angles
(from 0° to 90°).
With the minimal setting, the water flows through a small
hose in the middle of the ceramic discs.
Note
The rotary regulator cannot be repaired and must be re-
placed as a complete unit.
Water flow with opening angle 0° - 90°
57
English 5.906-432.0 Rev. 00 (06/15)