Pump Service Requirements

case), Class 2 (multi-stage) except as modified below. Each pump shall be

two stage with horizontal split casing, enclosed single suction opposed

type impellers, renewable casing and impeller wearing rings, stuffing box

with quenching gland and flooded oil lubricated, water cooled bearings.

2.9.3.1

Pump Service Requirements

a.

Capacity:

[_____] L/s gpm

b.

Pumping temperature:

[_____] degrees C F

c.

Liquid pH:

[_____]

d.

Discharge head:

[_____] Pa feet

e.

Available NPSH:

[_____] Pa feet

f.

In addition to the operating point established above, the pump

curve shall also run through the following points:

Capacity

Discharge Head

[_____] L/s

[_____] Pa

[_____] L/s

[_____] Pa

Capacity

Discharge Head

[_____] gpm

[_____] feet

[_____] gpm

[_____] feet

2.9.3.2

Construction

Boiler feed pumps shall be bronze fitted including bronze impeller and

impeller wear rings, and ASTM A 48M ASTM A 48, Class 30, cast iron casing.

Provide casing with suction and discharge gages in tapped openings. Mount

each pump and prime mover on a fabricated steel bed plate having a drip

collection chamber with tapped drain openings. Provide lifting attachments

to enable equipment to be set into its normal position and to enable pumps

to be easily dismantled in place.

2.9.3.3

Electric Motors

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NOTE: The designer shall perform an economic

analysis and make a technical evaluation to

determine if the boiler feed or condensate pump

motors shall be provided with variable speed

control. Generally, variable speed drives for

boiler feed or condensate pumps over 5 1/2 kW 7 1/2

HP will be cost effective.

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[Variable speed], [open driproof], [totally enclosed], [fan cooled],

[_____] volt, three phase, 60 Hz of not less than [_____] kW hp, as

specified under "Motors and Drives" [and "Variable Speed Control For

Motors"] in this section. [Variable speed] electric motors [or turbines]

direct connected to respective pumps with a gear type, forged steel,

flexible coupling. Provide a shaft and coupling guard.

SECTION 15511N

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