shall employ a single cooling circuit for both cooling the oil being
delivered by a forced oil system to sleeve radial bearings and a floating
shoe thrust bearing, coupled with the seal coolers for both stuffing boxes.
Mechanical seals shall also be provided. In both cases, stuffing boxes
shall be site-convertible to a packed box. Leakage shall be no more than
25 mm/hour 25 cc/hr for a seal life of no less than 25,000 hours. Bearing
rating shall be not less than 100,000 hours (L-10 life) at the point of
maximum load, as defined by ABMA 9.
2.15.1.2
Base
Pumps shall be supported on structural steel bases that do not require
grouting in order to impart strength to the pump for static and dynamic
loading from the piping system. The bases shall be pitched to a low point
drain. The complete pump and motor assembly shall be shop-aligned using
shims on both the pump and the motor.
2.15.1.3
Couplings
All pumps shall be furnished with nonlubricated flexible-disc couplings and
a coupling guard furnished to OSHA requirements. Couplings shall be
spacer-type to permit removal of the mechanical seals and
limited-end-float-type for pumps with sleeve bearings.
2.15.1.4
Automatic Recirculation
**************************************************************************
NOTE: If automatic recirculation valve is utilized,
delete this paragraph.
**************************************************************************
All pumps shall be furnished with a self-contained automatic recirculation
control valve that shall be sized for nominally 25 percent of the pump's
BEP flow.
2.15.1.5
Turbines
Steam turbines for boiler feed pump shall operate the pump properly in a
steam pressure range of [_____] Pa psig with steam backpressure of [_____]
Pa psig. Turbines shall have horizontally-split, two-piece, centerline
supported casings, water-cooled bearing cases with ring-oiled,
babitt-lined, bronze packed sleeve bearings. Turbines shall also be
equipped with a mechanical shaft speed governor and valve, independent
overspeed emergency governor and trip valve, reed tachometer, constant
pressure type governor, insulation with removable metal jacket, oil-sight
glasses with guards, stainless steel steam strainer that is removable
without disconnecting piping, any special wrenches and tools required for
servicing the turbine, and a sentinel warning on the exhaust casings.
Turbines shall conform to NEMA SM 23.
2.15.1.6
Electric motors shall be selected for continuous duty and non-overloading
characteristics suitable for the power characteristics available. Motors
shall be [splashproof] [totally enclosed, nonventilated] [totally enclosed,
fan-cooled type] [totally enclosed, fan-cooled type, suitable for
installation in a Class II, Division 1, Group F hazardous location in
accordance with the NFPA 70]. [Motor starter shall be [manual] [[magnetic]
[across-the-line] [reduced voltage start]] type with [general-purpose]
SECTION 15559A
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