Mankenberg UV Originalbetriebsanleitung Seite 22

Original operating manual
spring-actuated pressure control valves UV
Type of fault Action
Malfunction A foreign object may be jammed in the seat and be preventing proper sealing:
Leakage at the seat - Pressure reducing valve DM: fully tighten spring
means the set inlet
- Back pressure regulator UV: fully release the tension of the spring
or outlet pressure is
not correctly
- Vacuum control valve: according to design, the abovementioned has to be
regulated:
observed
clean the
- Differential pressure control valve: according to design, the abovementioned has to
functional parts
be observed
- Flow control valve: according to design, the abovementioned has to be observed
so that the valves open and foreign objects can be flushed out.
If the functional fault cannot be rectified in this way: Cleaning is necessary: the
pressure-reducing valve must be dismantled
The pretensioned spring must be fully slackened before a valve is dismantled!
To prevent any risk for operating personnel, make sure that this repair measure is
only carried out when the valve is not under pressure. Take note of section
hazards
When the valve is not under pressure, take off the spring module by releasing the
clamp rings (or the screw connection) and dismantle the diaphragm (or piston/
bellows) and functional parts for cleaning. Here all parts of the maintenance set
should be renewed.
Afterwards, assemble the valve and readjust it, as described under section
start-up
Malfunction If during cleaning it is found that the control mechanism (diaphragm, piston or
bellows), the cone or other functional parts are damaged:
Cleaning alone –
see above – cannot Repair necessary: damaged parts must be replaced.
rectify the fault:
If the repair is to be carried out in the customer's workshop:
the valve must be
make a note of all data according to the markings on the fitting and order the spare
repaired
parts and necessary instructions from Mankenberg, see section
[Page 24].
or:
Send the valve to the manufacturer for repair. See section
[Page 24]
UV-4.X.23.2 Issue 16.08.2023
Danger of fatalities
[Page 9].
[Page 16].
for the addresses.
22
Special
Initial
Further information
Further information
www.mankenberg.com