Mankenberg RP 824 Originalbetriebsanleitung Seite 25

Original operating manual
pilot-operated pressure regulators RP 824
Type of fault
Functional fault
Leakage at the seat
means the set inlet
or outlet pressure is
not correctly
regulated:
Functional fault
Cleaning alone –
see above – cannot
rectify the fault:
RP 824-4.X.231 Issue 17.11.2023
Action
Clean the functional parts
A foreign object may be jammed in the seat and be preventing proper sealing:
- Pressure reducing valve DM: fully tighten spring
- Back pressure regulator UV: fully release the tension of the spring
- Vacuum control valve: according to design, the abovementioned has to be
observed
- Differential pressure control valve: according to design, the abovementioned has to
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
WARNING! The pretensioned spring must be fully relaxed before a valve is
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 Special
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 kit
should be replaced.
Afterwards, assemble the valve and readjust it, as described under section Initial
start-up .
The valve must be repaired
If during cleaning it is found that the control mechanism (diaphragm, piston or
bellows), the cone or other functional parts are damaged:
Repair necessary: damaged parts have to be replaced.
If the repair is to be carried out in the operator's workshop:
make a note of all data according to the markings on the valve and order the spare
parts and necessary instructions from Mankenberg. See section
[Page 26].
or:
Send the valve to the manufacturer for repair. See section
[Page 26] for the addresses.
dismantled!
25
Further information
Further information
www.mankenberg.com