2.
Keep suction pipe free from air pockets.
4.9 Discharge Piping
1.
Gate and check valves should be installed in the discharge line. The check valve should be locat-
ed between the gate valve and pump to permit inspection of the check valve. The gate valve is
required for priming, regulation of flow and for inspection and maintenance of the pump. The
check valve is required to prevent reverse flow through the pump when the driver is turned off.
2.
Increasers, if used in discharge line, should be placed between the pump and check valves.
3.
If quick-closing valves are installed in the system, cushioning devices should be used to protect
the pump from surges and water hammer.
4.10 Connection of Piping
1.
Connect suction and discharge piping to the pump.
2.
Rotate pump shaft several times by hand to be sure there is no binding and that all parts are free.
3.
Recheck alignment.
NOTICE:
On non-metallic pumps, use gaskets which are suitable for the flanges. PTFE envelope style is
recommended.
4.11 Rotation
WARNING:
•
Starting the pump in reverse rotation can result in the contact of metal parts, heat genera-
tion, and breach of containment. Ensure correct driver settings prior to starting any pump.
•
Failure to disconnect and lock out driver power may result in serious physical injury or
death. Always disconnect and lock out power to the driver before performing any installa-
tion or maintenance tasks.
•
Electrical connections must be made by certified electricians in compliance with all
international, national, state, and local rules.
•
Refer to driver/coupling/gear manufacturer's installation and operation manuals
(IOM) for specific instructions and recommendations.
NOTICE:
Serious damage may result if pump is run in wrong direction.
1.
Before coupling is connected, the motor should be wired and the direction of rotation checked.
2.
The direction of rotation is marked on the pump. Make sure driver rotates in the same direction.
4.12 Connection of Coupling
WARNING:
Failure to disconnect and lock out driver power may result in serious physical injury or death.
Always disconnect and lock out power to the driver before performing any installation or main-
tenance tasks.
4.9 Discharge Piping
3175 Installation, Operation and Maintenance Instructions
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