User Manual

Suction Lift Conditions

1. Suction pipe must continuously slope upward

towards pump suction to eliminate air pockets.

2. All joints must be air tight.

3. A means of priming the pump must be provided,

such as a foot valve.

Suction Head/Flooded Suction Conditions

1. An isolation valve should be installed in suction

line to permit closing of the line for pump

inspection and maintenance.

2. Piping should be level or slope gradually

downward from source of supply.

3. No portion of piping should extend below pump

suction flange.

4. The suction pipe shall be submerged sufficiently

below the liquid surface to prevent vortices and air

entrainment at the supply.

DISCHARGE PIPING

1. Isolation and check valves should be installed in

discharge line. Locate check valve between

isolation valve and pump which will permit

inspection of check valve. An isolation valve is

required for isolating, priming, regulation of flow,

inspection and maintenance of the pump. A check

valve prevents pump damage due to reverse flow

when driver is turned off.

2. Increasers, if used, should be placed between

pump and check valves.

3. Cushioning devices should be used to protect

pump from surges and water hammer, if

quick-closing valves are installed in system.

FINAL PIPING CHECK

After Connecting Piping to the Pump

1. Rotate shaft several times by hand to be sure that

there is no binding and all parts are free.

2. Check alignment, per the alignment procedure

outlined previously to determine absence of pipe

strain. If pipe strain exists, correct piping.

3296 M Group 6/05 17