Seepex BW 10, Operating And Maintenance Instructions Manual

Page: 97 / 186

Commissioning/
De-commissioning
Ausgabe
issue
C / 02.01.2006
Dokument
document
OM.COM.01e
Blatt
sheet
2 (3)
6.4
Equipment for Protection of Persons
Machines must be fitted with mechanical
protective devices complying with DIN EN
809.
Moving or working parts must be
protected against accidental contact.
However, safety considerations demand
it be possible at all times
to check without hindrance whether the
shaft seal is fully functional.
A protective guard is necessary in this
area only if components are mounted on
the rotating, smooth shaft.
If pumps are operated with an open
suction flange/feed hopper, a suitable
protective guard complying with DIN EN
294 must be mounted.
Country-specific protective regu-lations
must be observed at the site of
installation.
Prior to activation of the pump, check the
proper function of all protective
equipment.
6.5
Commissioning
6.5.1
Initial Startup/Re-starting
CAUTION
Every seepex progressive cavity pump is designed
for the specific operating conditions documented in
the data sheet. Commissioning is permissible only if
the operating conditions conform with those
indicated in the data sheet. Although the potential
usages of the seepex pump are not confined to the
specified operating conditions, any change in the
original conditions must be checked and approved
by seepex.
The right to make claims under the warranty
agreement will be annulled if operating conditions
are changed without prior approval by seepex.
6.5.2
Avoid Dry Running of Pump
CAUTION
The dry running of a pump increases the friction
between rotor and stator, quickly causing an
unacceptably high temperature to develop on the inner
surface of the stator. This overheating leads
to burning of the stator material and the total
failure of the pump.
For this reason it is necessary to ensure that the
suction-sided flow never dries up completely.
If a continuous flow cannot be guaranteed for the
plant, it is essential to fit the seepex dry running
protection device TSE, available as an optional
accessory.
6.5.3
Check Pressure at Suction and Pressure Flanges
6.5.3.1
Safeguard Pump Against Excessive
Pressure at the Suction Flange
The seepex pump is designed to
operate with the pressure at the suction
flange (suction head or inlet pressure)
specified in the data sheet. Deviating
pressure conditions may lead to the
failure and/or destruction of the shaft
seal or entire pump.
For this reason the suction pressure
specified in the data sheet must be
guaranteed. Appropriate monitoring
devices are oil-filled contact mano-
meters that deactivate the pump.
6.5.3.2
Safeguard Pump Against Excessive Pressure at
the Pressure Flange
The seepex pump operates according to
the positive displacement principle.
Operation of the pump against an
excessive pressure caused by closed
valves, by high pressure losses in the
piping or by product sedimentation will
lead to the destruction of the pump,
drive, pipe work and/or downstream
equipment. Every progressive cavity
pump must therefore be protected
against overpressure. Safety valves with
bypass pipes or oil-filled contact
manometers that disactivate the pump
are appropriate protective devices.
6.5.4
Drive Engine
Consult the attached manufacturer's
operating instructions, Point 10, for
information on commissioning the drive
engine.