used for the intermediate shafting. Alternate 2 is
used when all the shafting is stainless steel.
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[Provide replaceable stainless steel one-piece journal sleeves at each
guide bearing, packing gland and seal locations. Finish sleeves at all
bearings and packing gland locations to at least 32 rms and finish sleeve
at seal locations to 16 rms. Securely fasten sleeves to shaft to prevent
movement. Keys and fasteners, if used, shall be made from corrosion
resisting steel; fastening by adhesive or welding is not acceptable. The
surface hardness of the sleeves at the bearing and packing gland locations
shall be as recommended by the pump manufacturer.]
[Finish the shaft journal at all guide bearing and packing gland locations
to at least 32 rms and finish shaft at seal journal locations to 16 rms.
The Contractor has the option to install replaceable stainless steel
one-piece sleeves at each bearing, packing gland and seal locations with
the finishes stated above. Securely fasten sleeves to shaft to prevent
movement. Keys and fasteners, if used, shall be made from corrosion
resisting steel; fastening by adhesive or welding is not acceptable. The
surface hardness at the seal locations shall be as recommended by the seal
manufacturer.]
2.2.9.4
Circumferential Line
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NOTE: The circumferential line with pointer should
be used for pumps having 1200 mm (48 in.) and
greater discharge diameters. The following
information shall be used for determining whether
the pump driver is specified as using a hollow or
solid shaft.
Pump drivers with rating less than 745 kW (1000
horsepower) shall be equipped with hollow shafts
permitting vertical shaft adjustment from the top of
the driver.
Pumps drivers over 745 kW (1000 horsepower) shall be
equipped with hollow shafts whenever possible but as
a minimum the pump shall have a means of vertical
adjustment above the operating floor.
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A circumferential line shall be inscribed or etched on shaft above stuffing
box and an adjustable pointer shall be provided and mounted opposite this
line in order to indicate a change in vertical position of shaft and to
permit realignment after [motor] [gear reducer] removal.
2.2.10
Shaft Enclosure
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NOTE: Shaft enclosure tubes are tensioned for pumps
with discharge diameters less than 1350 mm (54 in.).
Rigid enclosing tubes are used on pumps having
discharge diameters 1350 mm (54 in.) and greater.
External supports or bracing located in the pump
water passage are used for pumps with tensioned
enclosing tube of 6000 mm (20 ft) in length or
SECTION 15131A
Page 33
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