DHV 525 en
16
15.750045-V3.0
!
Warning
Danger of injury! Never set the opening pressure higher than the maximum permis-
sible operating pressure of the dosing system and dosing pump.
!
Warning
When dosing dangerous media, always refer to the corresponding safety data
sheets! Wear protective clothing (goggles, gloves) when working on the connec-
tions and lines!
Caution
The pressure loading valve does not function as a shut-off valve. Therefore, the
adjusting screw must not be tightened too far.
6.2
Setting Instructions for Opening Pressure
7
Possible Faults
Proceed as follows if the factory-set pressure is to be changed:
With the pump running:
1.
Remove the cap from the top part of the pressure loading valve.
2. Read the current opening pressure on the manometer.
3. For DN4 and DN8 use a hexagon wrench,
for DN20 - DN65 use a pair of needle-nose pliers:
•
in the clockwise direction to increase the pressure
•
in the counterclockwise direction to reduce the pressure
until the desired opening pressure is set.
4. Attach the cap again.
Fault
Cause
Elimination
pressure loading
valve set incorrectly
(too low)
Set pressure loading
valve to a higher
opening pressure
Diaphragm faulty
Replace diaphragm
Contamination
Clean pressure
loading valve
pressure loading
valve produces
no backpressure
Q-Pulse Id: VM25
