SERIES 120 REGENERATIVE TURBINE PUMPS PART I - GENERAL

SERIES 120 REGENERATIVE TURBINE PUMPS  PART I - GENERAL
SERIES 120
REGENERATIVE TURBINE PUMPS
PART I - GENERAL
1.01
DESCRIPTION
The Contractor shall furnish materials, equipment and labor to
furnish, install and test the pumping system complete with the pumps,
motors, mounting bases, piping, valves and appurtenances, as indicated
on the contract drawings and as herein specified.
1.02
INSTALLATION
The Contractor shall insure that the pumps and motors are
properly installed with no pipe strain transmitted to the pump casing.
1.03
RESPONSIBILITY
To assure a properly integrated and compatible system, all
equipment described in this section shall be furnished by the Pump
Manufacturer, who shall assume full responsibility for the proper
operation of the pumps and associated equipment.
1.04
SUPERVISION
The Contractor shall arrange for the Pump Manufacturer to
provide a factory-trained representative as required for the purpose of
supervising installation, start-up, final field acceptance testing, and
providing instruction to the owner's operating personnel in the proper
operation and maintenance of the equipment in this section.
1.05
REFERENCE STANDARDS
The work in this section is subject to the requirements of
applicable portions of the following standards:
Hydraulic Institute Standards
IEEE Standards
NEMA Standards
OSHA Rules and Regulations
PART II - PRODUCTS
2.01
GENERAL DESCRIPTION
The pump shall be a regenerative turbine type pump series 120 as
manufactured by Aurora Pump or pre-approved equal of vertically split
case design with removable bearing housings and the channel rings shall
be replaceable without replacing the bearing housings. Pre-approval
must be obtained a minimum of ten days before bid date.
2.02
MATERIALS OF CONSTRUCTION
Retainer.............................Nylon
Casing...............................Cast Iron (ASTM A48)
Impeller.............................Bronze (ASTM B62)
Shaft................................Stainless Steel (AISI 416)
Channel Rings........................Cast Iron (ASTM A48)
Bearing Covers.......................Cast Iron (ASTM A48)
Glands...............................Cast Iron (ASTM A48)
Packing..............................Graphited Teflon Fiber
2.03
CASING
The suction and discharge connections shall be cast integral
with the casing. The discharge shall be in a vertical position and the
pump shall be self-venting. The casing and bearing housings shall be
cast of 30,000 pound tensile strength cast iron.
2.04
IMPELLER(S)
The impeller(s) shall be of the regenerative turbine or
periphery vane type, with the pumping vanes machined on both sides of
the impeller to balance hydraulic thrust. The impeller(s) shall be
located on the stainless steel shaft between grease lubricated ball
bearings. The impeller shall be hydraulically self-centering and no
external adjustment shall be necessary.
2.05
SHAFT
The shaft shall be turned and polished, and have a keyway
machined on the inboard extension to accept a coupling half. The
outboard extension of the shaft shall be threaded to accept a shaft nut
to prevent excessive lateral shaft movement.
2.06
CHANNEL RINGS
The channel rings shall have an individual water passageway
machined, and cleaned of all burrs, trimmings and irregularities. The
channel rings shall be pinned to the bearing covers to prevent
rotation.
2.07
BEARING COVERS
The bearing covers shall bolt to the casing, with an O-ring seal
between the casing and the bearing cover. the bearing cover shall
include a stuffing box of adequate size to accept either mechanical
seals or packing rings. Tapped and plugged openings for external
flushing to the stuffing box shall be provided. Each bearing cover
shall incorporate the bearing housing with a single-row regreaseable
ball bearing, with grease fittings provided. An adjusting nut shall be
provided to allow inspection and replacement of bearings without
complete disassembly of the pump. A water slinger shall be provided on
both the inboard and outboard sides of the pump between the stuffing
box gland and bearing housing. The bearing cover for packed pumps
shall incorporate a reservoir area for the accumulation of weepage, and
an opening for connection to a drain.
2.08
MECHANICAL SEAL
Shaft sealing shall be accomplished by means of a mechanical
seal with a Ni-Resist seat, carbon washer, Buna-N elastomers, and
stainless steel metal parts.
2.09
SEAL GLAND
The bearing cover shall be machined to accept the seal cup to
assure positive alignment of the seal faces and eliminating the need
for a separate seal gland.
2.10
COUPLING
A flexible coupling shall be provided to connect the pump shaft
to the motor shaft. The coupling shall be of an all metal type with a
flexible rubber insert. The entire rotating coupling element shall be
enclosed by a coupling guard.
2.11
BASE PLATE
The pump and the motor shall be mounted on a groutable formed
steel baseplate or a steel driprim baseplate with integral drip
channels incorporated on each side. Each drip channel shall include an
NPT drain connection and plug. The base shall be sufficiently rigid to
support the pumps and the motor without the use of additional supports
or members.
2.12
MOTOR
The motor shall be horizontal and in accordance with the latest
NEMA standards, and shall have the following characteristics:
Enclosure........................Open Drip Proof/TEFC/X-Proof
Number of Phases.................Three
Cycles...........................60 Hz
Voltage..........................230/460 volt
Speed............................3600 RPM
Horsepower....................... hp
Each motor shall have a sufficient horsepower rating to operate
the pump at any point on the pump's head-capacity curve without
overloading the nameplate horsepower rating of the motor regardless of
service factor. The motor shall have a service factor of 1.15. The
service factor is reserved for variations in voltage and frequency.
PART III - PERFORMANCE
3.01
CONDITIONS OF SERVICE
The following conditions of service shall be strictly adhered
to:
Number of Units...............?
Type of Drive.................? (variable or constant)
Discharge Size................1.5 in, minimum
Suction Size..................2 in, minimum
Design Capacity............... US gpm
Design Head................... ft
Efficiency at Design.......... %, minimum
Rotative Speed................3500 RPM, maximum
Shut-off Head.................1626 ft, minimum
Driver Horsepower.............13.2 hp, minimum
NPSHR at Design............... ft, maximum
3.02
INSPECTION AND FACTORY TESTS
Each regenerative turbine pump furnished under these
specifications shall be tested at the factory to verify individual
performance (VIP). Certified copies of all test reports shall be
submitted to the Engineer for approval prior to shipment.
3.03
INSTALLATION AND ACCEPTANCE TESTS
A.
The pumping units shall be installed in accordance with the
instructions of the manufacturer and as shown on the drawings by the
Contractor.
B.
Installation shall include furnishing the required oil and
grease for initial operation. The grades of oil and grease shall be in
accordance with the manufacturer's recommendations.
NOTES: Teflon is a registered trademark of E.I. DuPont.
Additional information on Aurora Pump products is available from
any Aurora Pump authorized distributor.
Aurora Pump reserves the right to make revisions to its products
and specifications without notice.
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