e.
Available NPSH:
[_____] meters feet
f.
In addition to the operating point established above, pump curve
shall also run through the following points:
Capacity
Discharge Head
[_____] L/s
[_____] meters
[_____] L/s
[_____] meters
Capacity
Discharge Head
[_____] gpm
[_____] feet
[_____] gpm
[_____] feet
2.14.4.2
Construction
Bronze impellers and impeller wear rings. [Cast iron] [ductile iron] pump
casing designed for the specified conditions. Bearings shall be oil
lubricated. Equip casing with tapped openings for suction and discharge
gages. Provide gages in openings. Mount pump and driver on a fabricated
steel bed plate having a drip collection chamber with tapped drain
openings. Provide lifting attachments for installation and maintenance.
2.14.4.3
Drives
**************************************************************************
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 pumps
over 5 1/2 kW 7 1/2 hp will be cost effective.
**************************************************************************
[Variable speed] electric motors or [turbines] direct connected to
respective pumps with a gear type flexible coupling. Provide shaft and
coupling guards.
a.
Electric Motors: [Variable speed], [open driproof], [totally
enclosed], [fan cooled], [_____] volt, three phase, 60 Hz of not
less than [_____] kW hp, as specified in paragraph[s] entitled
"Motors and Drives" [and "Variable Speed Control For Motors"].
[b.
Steam Turbines: Single stage, rated at not less than [_____] kW
hp, with inlet steam pressure of [_____] kPa (gage) psig and
[_____] degrees C F, normal exhaust back pressure of 34 kPa (gage)
5 psig and a maximum back pressure of 103 kPa (gage) 15 psig.
Water rate at full load and normal steam conditions shall not
exceed [_____] kg per BkW per second pounds per BHP per hour.
Provide a stainless steel steam strainer, sentinel relief valve,
sight oil level indicator and one hand valve.
(1) Turbine Construction: Turbine casing split on the horizontal
or vertical centerline constructed of ASTM A 48M ASTM A 48 cast
iron, with a design pressure rating of 1724 kPa (gage) at 232
degrees C 250 psig at 450 degrees F at inlet, and 379 kPa (gage)
at 232 degrees C 55 psig at 450 degrees F at the outlet.
SECTION 15501N
Page 129
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