Aurora 3800 Series Specifications

Aurora 3800 Series Specifications
SERIES 3800
HORIZONTAL FRAME MOUNTED 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 flexible-coupled end suction pump, Aurora Model 3804 or preapproved 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......................316 Stainless Steel (ASTM A276)
Shaft.........................Steel (AISI C1045)
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 and the discharge outlet
shall be a bolt through flange connection, and tapped for pressure gages. 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 have integral cast feet.
2.04 IMPELLER
The impeller shall be of the enclosed type, and investment cast. 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 MOTOR BRACKET AND SEAL PLATE
The seal plate and motor bracket shall be of a two piece design, and shall provide an adequate area for
internal recirculation of the pumped fluid around the sealing medium.
2.06 MECHANICAL SEAL
Shaft sealing shall be accomplished by means of a mechanical seal with a Ceramic seat, carbon washer,
Buna-N elastomers, and stainless steel metal parts.
2.07 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. The
outboard shaft extension shall be machined with a keyway to accept a coupling to the driving unit. Lip
seals shall be furnished on both the inboard and outboard shaft extensions, and a water slinger shall be
furnished on the inboard shaft extension closest to the mechanical seal.
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.
2.09 POWER FRAME
The power frame shall house a single-row outboard regreaseable thrust bearing. Both bearings shall be
selected for a 3 year minimum life at maximum load. The outboard bearing shall be locked in place by a
retaining ring. The inboard bearing shall not be locked in order to accommodate thermal expansion of the
shaft. Lubrication fittings shall be provided in convenient location. A bearing cartridge end cap shall be
provided on the outboard side of the power frame to allow inspection of the thrust bearing without the
need for disassembling the power frame housing.
2.10 FOOT SUPPORTS
The pump unit shall be supported from feet cast into the casing and a bracket mounted to the power
frame.
2.11 BASEPLATE
The pump and motor shall be mounted on a groutable formed steel baseplate or a drip-rim baseplate with
integral drip channels incorporated on each side. Each channel shall include an NPT drain connection
and plug. The base shall be sufficiently rigid to support the pump and the motor without the use of
additional supports or members.
2.12 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 assembly shall be enclosed
by a coupling guard.
2.13 MOTOR
The motor shall be a NEMA 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
Horsepower......................? hp
Each motor shall have a sufficient horsepower rating to operate the pump at any point within the
manufacturer’s recommended operating range 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......................3600 RPM, maximum
Shut-off Head....................... ft, minimum
Driver Horsepower.................... 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.
Additional information is available from any Pentair Aurora authorized distributor.
Pentair reserves the right to make revisions to its products and their specifications without notice.
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement