pumping stations having discharges over the
protection, free discharge or a discharge chamber
type pumping station. If this alternate is
selected, the Specifier should attach FIGURE 1,
SYSTEM LOSS CURVE to the end of this section.
Pool-to-pool heads (Alternate 2) are usually
specified when the discharge and suction systems are
complex and total head is found by model test or
determined by the Contractor.
Bowl Head (Alternate 3).
**************************************************************************
[Static head is the difference, in meters feet, between water surface
elevation in [sump bay][sump][immediately inside trashrack] and [top of
discharge pipe at highest elevation][water surface elevation of
[river][lake][discharge chamber][centerline of discharge flap gate in
discharge chamber][_____]]. Total head includes static head, friction
losses outside of equipment being furnished, plus velocity head loss. A
curve showing friction losses plus velocity head for pumped capacities is
included at the end of this section.]
[Pool-to-pool head is the difference in meters feet between the water
surface elevation in the [sump bay][sump] and water surface elevation in
[discharge chamber][discharge channel][river][_____]. Pump manufacturer
shall determine total head. Total head includes losses from the water
surface on suction side of pump to discharge water surface.]
[Bowl head is the difference in meters feet between the water surface
elevation in [sump bay] [sump] [immediately inside of trashrack] and
elevation of diffuser exit plus head of water occurring at the diffuser
exit. Pump manufacturer shall determine total head. Total head includes
losses beyond the pump diffuser plus velocity head loss.]
1.7
MAINTENANCE
1.7.1
Special Tools
**************************************************************************
NOTE: Add applicable sections for drive units used.
**************************************************************************
Furnish one set of all "special tools" required to completely assemble,
disassemble, or maintain pump. "Special tools" refer to oversized or
specially dimensioned tools, special attachment or fixtures, or any similar
items. If required, provide a device for temporarily supporting pump shaft
and impeller during assembly, disassembly, and reassembly of [motor][gear
reducer] when thrust bearing is not in place. Lifting devices required for
use in conjunction with [overhead ][truck] crane shall be furnished.
Provide portable steel cabinet large enough to accommodate all "special
tools" furnished under this paragraph and as required by Section(s) [[_____]
] [16221A ELECTRIC MOTORS, 3-PHASE VERTICAL INDUCTION TYPE] [16222A
ELECTRIC MOTORS, 3-PHASE VERTICAL SYNCHRONOUS TYPE], [[_____]] [15133A
[DIESEL] / [NATURAL GAS FUELED] ENGINE PUMP DRIVES] and [[_____]] [15005A
SPEED REDUCERS FOR STORM WATER PUMPS]. Mount cabinet on four rubber-tired
casters. Provide drawers to accommodate tools. Fit front of cabinet with
doors hinged to swing horizontally. Furnish doors with necessary stops,
catches, and hasps for completely securing cabinet with a padlock. Furnish
SECTION 15131A
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