SERIES 340 HORIZONTAL CLOSE COUPLED END SUCTION CENTRIFUGAL PUMPS

SERIES 340 HORIZONTAL CLOSE COUPLED END SUCTION CENTRIFUGAL PUMPS
SERIES 340
HORIZONTAL CLOSE COUPLED END SUCTION CENTRIFUGAL 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 centrifugal horizontal close-coupled end
suction pump, Aurora Pump Model 341 or pre-approved equal. Preapproval must be obtained a minimum of ten days before bid date.
2.02
MATERIALS OF CONSTRUCTION
Casing........................Cast Iron (ASTM A48)
Impeller......................Bronze (ASTM B584)
Shaft.........................Steel (AISI C1045)
Case Wear Ring................Bronze (ASTM B62)
Shaft Sleeve..................Bronze (ASTM B62)
2.03
CASING
The casing will be of the end suction design with tangential
discharge outlet. For suction piping diameters of 2" or less and
discharge piping diameters of 1.5" or less, the suction and discharge
connections shall be NPT threaded. For suction piping diameters of 2"
or greater, the suction inlet shall be a flat-faced flange connection
and the discharge outlet shall be a bolt through flange connection.
Flange connections shall be ANSI 125# rated. The casing shall have
tapped and plugged holes for priming and draining. The casing bore
shall be large enough to allow "back pullout" of the impeller without
disturbing the casing or suction and discharge piping. The casing
shall be supported by the driving unit.
2.04
IMPELLER
The impeller shall be of the enclosed type, vacuum cast in one
piece. It shall be finished all over, the exterior being turned and
the interior being finished smooth and cleaned of all burrs, trimmings,
and irregularities. The impeller shall be dynamically balanced. The
impeller will be keyed to the shaft, and fastened with a washer, gasket
and capscrew.
2.05
CASE WEARING RING
The pump casing shall be fitted with a case wear ring to
minimize abrasive and corrosive wear to the casing. The case wear ring
shall be of the radial type, press fitted into the casing.
2.06
STUFFING BOX
The stuffing box shall be integrally cast with a mounting
bracket, and shall provide an adequate area for internal recirculation
of the pumped fluid around the sealing medium.
2.07
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.
2.08
SHAFT
The impeller shall be direct-coupled to the motor shaft. The
motor shaft shall be machined to provide a keyway, and drilled and
tapped to accept the impeller fastener. Stub shafts are not
acceptable.
2.09
SHAFT SLEEVE
The pump shaft shall be fitted with a shaft sleeve to minimize
shaft wear.The sleeve shall be sealed to the impeller hub by an O-ring,
and shall be positively driven by a pin to the keyway. The use of
adhesive compounds to fasten the sleeve to the shaft shall not be
accepted.
2.10
MOTOR
The motor shall be a NEMA-JM configuration 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.
Voltages........................230/460 Volt
Speed...........................3600 RPM
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 at least
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......................1.25 in, minimum
Suction Size........................1.5 in, minimum
Design Capacity..................... US gpm
Design Head......................... ft
Efficiency at Design................ %, minimum
Rotative Speed......................3500 RPM, maximum
Shut-off Head.......................210 ft, minimum
Drive Horsepower....................10.2 hp, minimum
NPSHR at Design..................... ft, maximum
3.02
INSPECTION AND FACTORY TESTS
Each centrifugal 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. Each unit shall be hydrostatically
tested in accordance with the Hydraulic Institute Standards.
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 is available from any Aurora Pump
authorized distributor.
Aurora Pump reserves the right to make revisions to its products
and their specifications without notice.
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