SPP id: Version 14 > / 120601 / Replaces 110901 / en /
N31572
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Series
2.15
INSTRUCTIONS
June 2012
Page
ISO
G
COPYRIGHT © SULZER PUMPS FINLAND OY
ORIGINAL INSTRUCTION
USER'S MANUAL – AHLSTAR
Operation
C A U T I O N
There is a risk of destroying the suction impeller of a liquid ring pump by cavitation, if the vacuum level
has been adjusted too high or the vacuum relief valve has been taken off and the connection has been
plugged.
•
When the pump starts to pump and the pressure on the discharge side rises, open the discharge valve until
the desired liquid volume is reached. If the pump and suction pipe are full of liquid, the pressure will rise
immediately after starting. If the pump is empty when being started, it takes some time for the pressure to
rise.
2.3 Pumps equipped with gas separators (-GM, -GS) or air separating pumps (-R)
•
Open the sealing liquid valves of the pump and of the potential degassing pump and adjust the flow rate to a
suitable level in accordance with Table 2.
•
Make sure that the suction valve is fully open and that the discharge valve is closed.
•
Start the motor of the degassing pump if there is one.
•
Adjust the desired vacuum by means of the vacuum relief valve (see pumps equipped with liquid ring
pumps).
•
Start the motor.
•
Open the degassing valve between the pump and the potential degassing pump.
•
Open the discharge valve carefully until the desired liquid volume is reached.
•
If the pump is used as a self-priming pump, do not open the discharge valve until the degassing pump has
sucked the pump full of liquid, the pump starts to pump and the pressure starts to rise on the discharge side.
•
Make sure that the pumped liquid does not flow out through the degassing connection. If it does, reduce the
vacuum created by the degassing pump by means of a potential vacuum relief valve. The sealing liquid may
flow out through the degassing connection.
3 Controls during the first run
W A R N I N G
Personal injuries may occur if personal protective equipment is not used when servicing the product.
When pumping hazardous liquids, skin and eye protection are required.
C A U T I O N
Do not operate the pump below the minimum recommended flow or with the discharge valve closed.
Cavitation or recirculation can lead to a quick pump failure.
By controlling the pump operation and output regularly, the possible need for service and repair can be anticipated.
In this way, the pump efficiency is kept high, the process is trouble-free and the maintenance costs are low.