SERIES 380 VERTICAL CLOSE COUPLED INLINE CENTRIFUGAL PUMPS PART I - GENERAL

SERIES 380 VERTICAL CLOSE COUPLED INLINE CENTRIFUGAL PUMPS  PART I - GENERAL
SERIES 380
VERTICAL CLOSE COUPLED INLINE 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 purposed
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 STANDARD
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 inline
back pull-out, Aurora Pump Model 382 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 B62)
Shaft............................Steel (AISI C1045)
Case Wear Ring...................Bronze (ASTM B62)
Shaft Sleeve.....................Bronze (ASTM B62)
Power Frame......................Cast Iron (ASTM A48)
2.03
CASING
The casing will be of the
suction and discharge flanges the
apart for mounting in pipe line.
casing suction branch to minimize
2.04
end suction hydraulic design, with the
same size located on a common CL 180*
The pump shall include a volute type
pumping noise.
IMPELLERS
The impellers shall be vacuum cast. They shall be finished all
over, the exterior being turned and the interior being finished smooth
and cleaned of all burrs, trimmings, and irregularities. The impellers
shall be dynamically balanced.
The impellers will be keylocked to the shaft.
2.05
CASE WEARING RINGS
The pump casing and stuffing box cover shall each be fitted with
a case wear ring to minimize abrasive and corrosive wear to the casing.
An additional case wear ring shall be supplied between the impellers.
The case wear ring shall be of the radial type, press fitted into the
casing.
2.06
MECHANICAL SEAL
Each pump is to be furnished with a mechanical seal with a NiResist seat, carbon washer, Buna-N elastomers and stainless steel metal
parts. A bypass line must be provided between the seal faces and the
discharge flange to assure adequate venting of the seal chamber and to
provide lubrication.
2.07
SHAFT
The impellers shall be direct-coupled to the power frame shaft.
The shaft shall be machined to provide an impeller keyway, and drilled
and tapped to accept the impeller fastener. The shaft shall be onepiece. Stub shafts are not acceptable. The outboard shaft extension
shall be machined with a keyway to accept a coupling to the driving
unit. Water slingers shall be furnished on both the inboard and
outboard shaft extension.
2.08
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.
2.14
MOTOR
Each pump is to be close-coupled to a motor shall in accordance
with the latest NEMA standards, and shall have the following
characteristics:
Enclosure....................Open Drip Proof/TEFC/XProof
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 reserve 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...................2.5 in, minimum
Suction Size.....................2.5 in, minimum
Design Capacity.................. US gpm
Design Head...................... ft
Efficiency at Design............. %, minimum
Rotative Speed...................3500 RPM, maximum
Shut-off Head....................203 ft, minimum
Driver Horsepower................19.1 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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