VACUUBRAND RC 5 - Manual (Page 17)

Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 99 78 31 / 20/12/2006
page 17 of 28
☞ Please read the whole chapter ”Replacing diaphragms and valves” before
starting maintenance.
Some pictures show pumps of other variants. This does not influence the replacing of the diaphragms
or valves!
Replacing diaphragms and valves
All bearings are encapsulated and are filled with long-life lubricant. Under normal op-
erating conditions, the pump is maintenance free. The valves and the diaphragms as
well as the motor capacitors are wear parts.
Depending on individual cases it may be efficient to check and clean the pump heads
on a regular basis, but at least every 10000 operating hours. Check diaphragms and
valves for cracks or other damage. In case of normal wear the lifetime of the dia-
phragms and valves is > 10000 operating hours.The operability of the diaphragm
pump can be checked as well by measuring the pressure in the oil reservoir:
➨ Remove oil filler plug. Remove hose nozzle from distributor plate and install in
tapped bore for oil filler plug (make sure O-ring is seated correctly).
➨ Using a suitable vacuum meter (e.g. DVR 2) and making sure that it is correctly
calibrated, measure the pressure in the oil reservoir. When the pump operates with
the inlet line closed, the measured pressure in the oil reservoir should be less than
25 mbar (with gas ballast valve of rotary vane pump closed).
➨ Remove hose nozzle from tapped bore for oil filler plug. Reinstall hose nozzle in
distributor plate and install filler plug with O-ring.
☞ Prevent internal condensation, transfer of liquids or dust. The diaphragm and valves
will be damaged, if liquids are pumped in significant amount.
If the pump is exposed to corrosive gases or vapour or in case of deposits, mainte-
nance should be carried out frequently.
☞ Regular maintenance will improve the lifetime of the pump and also protect both
man and environment.
Before starting maintenance vent the system, isolate the pump and other compo-
nents from the vacuum system and the electrical supply. Before starting maintenance,
wait two minutes after isolating the equipment from mains to allow the capacitors to
discharge. Drain condensate if applicable, avoid the release of pollutants. Allow suffi-
cient cooling of the pump. Ensure that the pump cannot be operated accidentally.
Never operate the pump if covers or other parts of the pump are disassembled.
Never operate a defective or damaged pump.
Ensure that the maintenance technician is familiar with the safety procedures which
relate to the products processed by the pumping system.
The pump might be contaminated with the process chemicals that have been pumped
during operation. Ensure that the pump is decontaminated before maintenance and
take adequate precautions to protect people from the effects of dangerous substances
if contamination has occurred.
☞ Wear appropriate safety-clothing when you come in contact with contaminated
components.
Tools required (metric):
- Phillips screw driver size 2
- Open-ended wrench w/f 10/15/17
- Hex key w/f 5
- Face wrench with torque indicator
Diaphragm ................................................................................................................................. 63 72 39
Valve .......................................................................................................................................... 63 88 36
Vacuum gauge DVR 2 ................................................................................................................ 68 29 02
Face wrench with torque indicator .............................................................................................. 63 75 80