3-4
Retaining ring
Flange
(1)
Remove the dust caps from the suction side and the discharge side of the casing of the pump.
(2)
Be sure to install pipe supports so that the weight of pipes, etc. is not applied on the main body of the
pump.
Caution
If the weight of pipes, etc. is applied on the pump, the casing may be
damaged.
(3) The connection flanges of the suction/discharge parts of the pump are loose flanges. Connect the pipe
after checking that the flange fits in the retaining ring of the casing part as shown in the figure below.
Tighten the bolts at the recommended torque shown in the table below while carefully avoiding uneven
tension.
(4) In order to reduce the transmission of vibration and noise, attach vibration-isolating joint(s) to the
discharge side or both the suction side and the discharge side of the pump.
(5)
Do not install any elbow near the suction port or the discharge port of the pump.
(6)
The suction pipe must be made as short and straight as possible.
(7)
Carefully attach joints, etc. to the suction pipe so as not to allow the entry of air.
(8)
Ensure that the diameter of the suction pipe is equal to or larger than that of the pump.
Caution
Ensure that the diameter of the suction pipe is equal to or larger than that
of the pump.
If the suction pipe is small, cavitation may occur.
(9)
For inflow operation
(9-1) For inflow operation, attach a sluice valve to the suction pipe as shown in the figure.
The maintenance of the pump can be performed without the need to discharge water from the tank
and the pipe.
Table 3-4-1: Recommended tightening torque for flanges
Pump type
Recommended
tightening torque
ASVM(N)(G)
25,32,40,50,65
70 N
・
m
ASVM(N)(G)
80,100,100B,125,125B
90 N
・
m
Figure 3-4-2: Example of construction for inflow operation
Figure 3-4-1: Suction / Discharge flanges
Pipe support
Sluice valve
Check valve
Vibration-isolating joint
Sluice valve
Pipe support
