DVZ Biomaster PLUS Series Final Documentation Download

Page: 112 / 145

Issue: 18.10.2011

DVZ-SKA-”BIOMASTER”-PLUS – Pump P2

Page 5 of 6

SKA-PLUS-ANNEX P5-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).