unbalanced axial loads imposed by the pump.] [Vertical type pump bearings
shall be water lubricated sleeve type constructed of babbitted graph alloy
with Type 304 stainless steel shaft sleeves.] The bearings shall be
designed for L-10 bearing life of [_____] hours.
2.8.2.11
Shaft Coupling
Shaft coupling between the pumps and motors shall be the flanged,
adjustable, rigid, spacer type with OSHA approved coupling guard. [On
horizontal end suction type pump, this coupling shall facilitate removal of
the mechanical seal without removing the driver.] Shaft coupling shall
also be designed to transmit at least 2 1/2 times the motor power rating.
2.8.2.12
Painting and Corrosion Protection
Pumps, motors and accessories shall be protected prior to initial startup.
Exposed unfinished work shall be thoroughly cleaned and smoothed. Surfaces
which will not be in contact with the pumping fluid shall be factory
painted with a finish coat. Internal surfaces shall be coated with a water
soluble rust preventative material.
2.8.2.13
Special Tools
Complete set of special tools shall be provided, if required for assembly,
disassembly or maintenance of pump.
2.8.2.14
Bedplate
Horizontal type pump shall include single bedplate long enough to
accommodate pump, motor drive and cooler. Bedplate shall be in accordance
with API and shall be of heavy rigid construction, made of suitably
structural steel members and plate to provide a stable platform for pump,
drive and accessories. Bedplate shall be suitably reinforced and braced to
minimize deflection or bending during shipment and erection. Sufficient
grout holes, minimum 75 mm 3 inch diameter, and grouting area vent holes in
each corner of each grout space shall be provided. Bedplate shall include
horizontal jacking screws and vertical leveling screws along the length and
width. Provisions shall be made on the bedplate to collect drainage from
the unit at one point. The hold down bolts and dowel holes shall be
located and drilled in field. Pump shall be mounted on bedplate at factory
and shipped as unit with bedplate mounted on a suitable skid to prevent
deformation of the bedplate during shipment and erection.
2.8.2.15
Alignment
Pump unit shall be precision aligned. Pump coupling, mechanical seal and
motor shall be mounted and matchmarked prior to shipment. Maximum
allowable shaft runout shall be 0.05 mm 0.002 inch as measured at impeller
end.
2.8.2.16
Pump Characteristics
a.
Pump discharge head shall be such that maximum discharge head
occurs at shutoff and continually decreases as the capacity
increases. Head capacity characteristics shall permit stable
operation when pump is operating alone or in parallel with another
pump.
b.
Pump shall have a shutoff head of no greater than 150 percent and
SECTION 15561A
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