Operating instructions
4.5 Starting up
The plant may only be started up by people who are familiar with the local safety
regulations and with these Operating Instructions (especially with the safety
regulations and safety instructions given here).
In order to be able to observe and monitor the shaft sealing, no protective covering
is provided in this area. If the pump is running, particular care should therefore be
taken (watch out for long hair, loose pieces of clothing etc.).
Starting up for the first time
•
If a pump is oil-lubricated,first open both oil drains „AS“ and drain off any liquid that may have
collected (e.g. condensation). Close oil drains „AS“ and fill oil as described in Point 2.3 (for
position of all secondary connections, see Summary of Screwed Connections in Appendix). Fill
to level described in Point 2.3.
•
For pumps with grease lubrication, no further lubrication is needed before initial start-up.
•
Pump and suction pipe must be filled with liquid when starting up. When filling, open vent
screw „LV“ on the first step casing (seen from the suction side).
•
Turn pump unit once again by hand and check that it moves smoothly and evenly.
•
Check that coupling guard is installed and that all safety devices are operational.
•
Switch on any sealing, flushing or cooling devices that are provided. See Data Sheet for quantity
and pressure.
•
Open slide valve in suction /intake pipe.
•
Set discharge side slide valve to approx. 25% of rated flow quantity. With pumps with a
discharge branch rated width less than 200, the slide valve can remain closed when starting up
(see also Point 1.4 „Minimum quantities“).
•
Check direction of rotation by switching on and off briefly. It must be the same as the directional
arrow on the bearing frame.
•
Start drive device.
•
As soon as it reaches normal operating speed, open discharge valve immediately and adjust the
required operating point.
•
Packing:
Packings need leakage to operate perfectly (liquid being handled to drip out).
To start with, set the leakage rate fairly high. During the first few hours of operation, slowly
reduce the leakage rate as the pump is running by gradually tightening the packing gland (see
item „69“ and „M2“ in the sectional drawing). The guideline value is around 10 drops/minute.
Packings that run dry will harden and then destroy the shaft sleeve and/or the
shaft.
Restarting
Basically, the same procedure should be followed as for starting up for the first time. However,
there is no need to check the direction of rotation and the accessibility of the pump unit.
The pump should only be automatically restarted if it has been made sure that the pump has
remained filled whilst lying idle.
Please
note
Pa 100/3-en
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