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Operation
2. Rotation Check
3. Start
Operational checks
Inspect pump carefully and frequently during the first few hours of operation. Mechanical seal
may weep slightly but should "run in" in a few hours. Be sure all auxiliary lines (cooling,
flushing, sealing, etc.) are functioning properly. Check pump bearings for excessive heating.
Check motor for excessive heating. Check complete unit for excessive vibration or unusual
noise. Do not run pump at greatly reduced flow because all the motor horsepower will go into
heating the liquid in the pump and damage may result. Do not run pump beyond maximum
recommended flow since damage could result due to excessive wear on the back washers
(546).
Table 1: Maximum recommended flow
Pump
BP20
BP40
BP70
BP100
BP200
SHUTDOWN PROCEDURE
If pump is installed with a check valve, it can be shut down without closing any valves. When no
check valve is used, the discharge valve must be closed before the pump is stopped to prevent
backflow through the pump. If the pump is to be serviced, be sure suction valves are closed,
auxiliary cooling and flushing flows are shut off and motor is locked out before working on
pump.
8
With motor uncoupled from frame, jog motor to check for proper rotation.
Rotation should be counter-clockwise when viewed from coupling end. Recouple when
satisfied.
Pump is now ready to start.
60 Hertz Speed
25 GPM
60 GPM
100 GPM
140 GPM
220 GPM
50 Hertz Speed
3
5.6 m
/h
20 GPM
3
13.6 m
/h
50 GPM
3
22 m
/h
80 GPM
3
32 m
/h
115 GPM
3
50 m
/ h
180 GPM
Model 3935 Installation, Operation and Maintenance Instructions
3
4.5 m
/h
3
11.4 m
/h
3
18.2 m
/h
3
26 m
/h
3
40 m
/h
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