DVZ Biomaster PLUS Series, Final Documentation

Page: 102 / 145

Issue: 04.05.2011 DVZ-SKA-”BIOMASTER”-PLUS – Pump P2 Page 5 of 6
SKA-PLUS-ANNEX P2-Eng
Maintenance/Service
Maintenance
–The information given in Section „Safety“ is to be
observed during maintenance and service operations.
Regular monitoring and servicing of the pump and drive
will prolong their service life.
General monitoring
1.The pump must not run dry.
2.The drive motor must not be overloaded.
3.Check suction and discharge pipelines for leaks.
4. An installed gland packing must drip slightly during
operation.
An installed mechanical seal must have no substantial
leakage.
5. Pressure and temperature monitoring devices must
be observed and compared with the order data sheet
and/or performance test report
6. Monitor auxiliary shaft seal systems, such as flushing,
sealing or quenching (if provided).
7. Monitor auxiliary heating or cooling systems in the gland
housing and/or suction casing (if provided).
Maintenance of components
Universal joints on the coupling rod
The universal joints on the coupling rod are lubricated
with special joint oil Type B or ET 1510 ISO 460 oil from
Tribol Lubricants GmbH, Mönchengladbach.
ATTENTION: We have not tested other lubricants and we
cannot therefore recommend them!
The joints are lubricated for life. However, if the pump
must be opened for other reasons, we recommend that
the tightness of the joint packing is checked and that
the joint oil is changed after 8000 operating hours. When
changing the joint oil, please refer to the disassembly and
assembly instructions.
Shaft seal
The shafts are sealed either by a gland packing or a
mechanical seal.
1. Gland packing
Increased leakage from the gland packing during the
initial operating hours usually diminishes of its own
accord during the running-in period.
If necessary, tighten the hexagon nuts (202) slightly at
the gland (203).
It should be noted that the gland packing should leak
slightly. This ensures that the frictional heat generated at
the sealing surface is dissipated.
If the leakage increases excessively and cannot be
reduced by repeated, slight tightening of the
hexagonalted nuts (202), the packing rings have lost their
elasticity and must be replaced.
- Removing the old packing rings and cleaning the
gland housing
After reducing the pump pressure and removing the
gland, the old packing rings can be removed by means of
a packing puller tool with a flexible shaft.
The gland area and the hollow shaft rings must then be
carefully cleaned in the area around the packing rings.
Worn hollow shafts must be replaced (please see
disassembly and assembly instructions).
- Fitting the packing rings
ATTENTION:
Basically, the packing rings fitted must be
suitable for the operating conditions of the pump.
When cutting to size ,we recommend a straight cut
perpendicular to the shaft. In order to obtain gap-
free, parallel contact of the cut packing ring ends, the
cutting angle should be approx. 20°to both cut ends
(see Figure 1).