Aurora 326 Vertical, In-Line Close Coupled Centrifugal Pumps Specifications

Aurora 326 Vertical, In-Line Close Coupled Centrifugal Pumps Specifications
SERIES 326
VERTICAL, IN-LINE CLOSE COUPLED 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 vertical close-coupled in-line
pump, Aurora Pump Model 326 or pre-approved equal. Pre-approval 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.........................Stainless Steel (AISI 416)
Case Wear Ring................Bronze (ASTM B62)
2.03
CASING
The casing will be of the in-line design with same size suction
and discharge flanges located on a common centerline 180 degrees apart
for mounting in pipe line. 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.
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 wear ring
shall be of the radial type, pressed fitted into the casing.
2.06
STUFFING BOX
The stuffing box shall be integrally cast with a motor mounting
bracket, and shall provide an adequate area for internal recirculation
of the pumped fluid around the sealing medium. A tapped and plugged
hole shall be provided for external flushing as required.
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
MOTOR
The motor shall conform to 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......................1800 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.........................1.25 in, minimum
Suction Size...........................1.25 in, minimum
Design Capacity........................ US gpm
Design Head............................ ft
Efficiency at Design................... %, minimum
Rotative Speed.........................1750 RPM, maximum
Shut-off Head..........................35.4 ft, minimum
Driver Horsepower......................0.493 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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