Condensate pumps shall be horizontal, end-suction, single-stage,
centrifugal, motor-driven pumps. Casing shall be of proper material for
the pressure involved, and the pumps shall be bronze or Monel trimmed, with
stainless steel shafts or shaft sleeves, and bronze impellers. Pumps shall
be provided with stuffing boxes. Lubrication shall be by splash oil with
oil level sightglass provided. Pumps shall be subject to the same tests
specified for the boiler feedpumps. Condensate pumps shall be installed on
suitable concrete foundations. Each pump shall have the capacity to pump
100 percent of the design load continuously. Pumps will pump a mixture of
condensate and sodium zeolite softened water from the condensate tank to
the deaerator. The NPSH required for all pumps shall not exceed [_____]
meters feet, and the pumps shall be capable of handling water up to 99
degrees C 210 degrees F under these conditions without cavitating. Ball
bearings amply sized for any and all thrust loads expected shall be
water-or oil-cooled and shall be self-aligning. All necessary vents,
drains, petcocks, oil sight glasses, etc., and the proper packing materials
for mixed condensate and makeup water service shall be of the
manufacturer's highest standards. Horizontal pumps shall be factory
assembled to the motor drives on a rigid structural steel or cast iron
baseplate. Each pump shall be directly connected to a motor through a
flexible coupling with approved coupling guards.
2.3.11.1
Design Conditions
The design conditions are:
a.
[_____] L/second gpm.
b.
[_____] head.
c.
Water pumped at 16 to 99 degrees C 60 to 210 degrees F.
2.3.11.2
Condensate Pump Drives
Condensate pump motor drives shall be amply sized to handle the pump power
with low discharge heads and shall not exceed 1750 revolutions per minute
(rpm). Motors shall be supplied for the power characteristics available
and shall be ball bearing and of totally enclosed fan-cooled construction.
Condensate pump motors shall be provided with a magnetic across-the-line
starter equipped with thermal overload protection. Starters shall be
located in the motor control center.
2.3.11.3
Condensate Pump Auxiliaries
Condensate tank and pumps shall be complete with all piping, suction
strainers, suction and discharge valves, check valves, and fittings
required for an integrated unit. Provisions shall be made in the pump
suction and discharge lines for thermal expansion and vibration isolation.
Piping shall be factory assembled. All pumps shall be furnished with
isolating valves on suction and discharge, suction strainers, startup
strainers, silent check valves, and recirculating piping. Pumps shall be
arranged with bypass line and orifice per manufacturer's specifications to
recirculate pumped fluid. All controllers, alarms, gauges, sight glasses,
control valves, etc., shall be provided with shutoff and/or bypass valves
as required for maintenance of the system while in operation.
2.3.12
Emergency Interlock
Emergency interlocks shall be provided to bypass the flue gas or shut down
SECTION 15846A
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