aurora-430b-series-two-stage-split-case-pumps-br.pdf

AURORA® 430B Series

TWO STAGE SPLIT CASE PUMPS

WWW.AURORAPUMP.COM

AURORA® 430B Series Two Stage Split Case Pumps Capacities to 400 G.P.M.

Heads to 1,000 Feet Temperatures to 300°F Power Series No. 2 and 3A

Modern Design.

High discharge pressures often require the use of multistage pumping units, which impose additional demands on the pump design. Various pressures and forces generated within a multistage unit must balance, making shaft and bearing design more critical than in single stage units. Aurora Pump has been designing and building multistage pumping units for over 90 years. The 430B Series reflects the latest in modern design for this important product.

Standard Features

• Bronze fitted pump construction

• Bronze shaft sleeves, O-ring sealed

• Dynamically balanced impellers

• Bronze case wearing rings

• Stainless steel impeller key

• Regreasable ball bearings

• Single row ball bearing (inboard)

• Double row ball bearing (Power Series 2 – outboard)

• Duplex back-to-back ball bearings (Power Series 3A – outboard)

• Single mechanical seals

• Maximum case working pressure

• Power Series 2 – 250 psi

• Power Series 3A – 450 psi

• Carbon steel shaft

• Lifting lugs

• Hydrostatic test

• Cast integral bearing arms

• Water slingers (neoprene)

• Grease seals

• Flanges per ANSI B16.1: class 125 suction, class 250 discharge

• Mechanical seal flush line

• Right-hand rotation

Optional Features

• All iron or iron impeller pump construction

• Hardened 440C stainless steel shaft sleeves (packing only)

• 316 SST shaft sleeves (mechanical seal)

• Oil lubricated bearings

• Mechanical seals: single unbalanced, high-temp.

• Cartridge type mechanical seals

• Stainless steel or Monel® shaft

• External bypass to stuffing boxes

• Steel drip rim or fabricated bases

• Left-hand rotation

• Certified performance test

• Packing with lantern ring

• 250# ANSI B16.1 suction and discharge flanges

• Water cooled bearing cartridge caps

• Metallic/Plastic hi-temp packing

• Stuffing box bushings

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Service, as well as hot or volatile liquid applications requiring low NPSH characteristics. The 45˚ diagonally split case feature allows both suction and discharge to be in the bottom half of the casing but above the centerline of the pump. This feature makes the casing self-venting. Because they are self-venting they will not vapor lock. Large suction areas give ideal NPSH characteristics. All of the advantages of the horizontally split case pumps are retained in that the entire rotating element can be removed without disturbing the piping.

highest efficiency and performance.

inexpensively replaced.

is 5 x minimum. Double row thrust ball bearing is standard on Power Series 2 models. Duplex back-to-back ball bearings are on Power Series 3A models.

Short bearing span holds shaft deflection to .002" at face of stuffing box at maximum load. Outboard thrust bearing is locked to shaft with lock nut.

Integral bearing arms eliminate bearing misalignment and simplify servicing.

seals have carbon against ceramic face. Long life is assured with 303 stainless steel metal parts and Buna-N Elastomer.

Pump Features

Base 3 5 6 8 9 11 Motor Frame

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T

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TS

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Weight 49 59 68 96 109 164 HP 3500 1-1/2 2-3 5 7-1/2 10 15 20 25 30 – 40 – 50 – 60 75 100 125 150

HA 15 17-1/2 17-1/4 20-1/2 20-1/2 26-3/4 HP 1750 1 1-1/2-2 3 5 7-1/2 10 15 20 25

HB 33-1/2 36-1/2 42-1/2 42-1/2 48-1/2 46-1/2 Motor Weight 40 45 72 80 130 145 220 240 330 370 370 370 475 475 525 710 775 975 1030

HN 3 3 3 3 3 4 C 12 13 13 14 16 18 21 23 22 24 24 25 25 26 26 27 28 30 31

Pump Size Pump Base

Disch. Suct. Bore Weight YY CP HO 1-1/2 3 9 300 9 26-1/4 19-3/4 3 3 3 3 5 6 8 8 8 9 9 9 11 11 11 11 11 11 11

2 4 9 310 9 26-1/4 19-3/4 3 3 3 3 5 6 8 8 8 9 9 9 11 11 11 11 11 11 11 1-1/2 3 11 11 34 25 – – 6 6 6 6 9 9 9 9 9 – 12 12 12 12 12 15 16

2 4 11 11 34 25 – – 6 6 6 6 9 9 9 9 9 – 12 12 12 12 12 15 16

Dimension Details

YYC

APPROX.

ANSI B16.1

CLASS 125

STD. SUCTION

STD DISCHARGE

ANSI B16.1, CLASS 250

HN

HAHB

CP APPROX.

HO

Notes:

not specified as they vary with each motor manufacturer.

7. Aurora® Pump reserves the right to make revisions to its products and their specifications, and to this brochure and related information without notice.

8. Individual performance curve must be used for final selection.

For selection not shown on range charts, refer to factory.

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Performance Data

0 5

0 20 40 60 80 100 120 140 160 180 200

10 15 20 25 30 35 40 45

CAPACITY – GPM

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10 HP

10 HP

7.5 HP

7.5 HP

2 HP

2 HP

1.5 HP

1 HP 1.5 HP

3 HP

3 HP

15 HP

5 HP

5 HP

POWER SERIES 3A

1.5x3x11

POWER SERIES 3A

2x4x11

POWER SERIES 2

2x4x9POWER SERIES 2

1.5x3x9

CAPACITY – CUBIC METERS PER HOUR

0 50 100 150 200 250 300 350 400

0 10 20 30 40 50 60 70 80 90

CAPACITY – G.P.M.

TO

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100 HP 75 HP

75 HP

100 HP

125 HP

60 HP 50 HP 40 HP 30 HP

30 HP 25 HP 20 HP 10 HP

15 HP

7.5 HP

7.5 HP

10 HP

15 HP

20 HP

25 HP

30 HP

40 HP

50 HP 5 HP

POWER SERIES 3A

1.5x3x11

POWER SERIES 3A

2x4x11

POWER SERIES 2

1.5x3x9

POWER SERIES 2

2x4x9

CAPACITY – CUBIC METERS PER HOUR

3500 RPM

1750 RPM

Note: For BHP and NPSH requirements see individual performance curves.

Engineering Specifications Model 431B Base Mounted Furnish and install as shown on the plans _____ Right hand (Left hand) Aurora® Model 431B type 45˚ Diagonal Split-Case, Opposed Suction, Two-Stage centrifugal pump, Size _____ x _____ x _____ of bronze fitted (all iron) construction.

The pump shall be capable of delivering at design conditions a capacity of _____ GPM when operating against a Total Dynamic Head of _____ feet, with a temperature of _____ ˚F, specific gravity _____. Pump shall have minimum guaranteed efficiency at design capacity of _____%. Pump must also be capable of delivering a maximum of _____ GPM when operating against a head of _____ feet, and at this condition shall have a minimum efficiency of _____%. Minimum shut-off head acceptable will be _____ feet. Pump shall operate at a maximum speed of_____ RPM. A unit operating at a lesser rotative speed will be considered, but in no event will a pump operating at more than the maximum speed specified be acceptable. The pump casing shall be with rear piping design and will be constructed of C.I. having a minimum tensile strength of 30,000 psi and shall be of sufficient thickness to withstand stresses and strains at full operating pressures.

Casings shall be subject to a hydrostatic pressure test at 150% of the specified duty point. Bearing housing supports, suction and discharge flanges shall be integrally cast with the lower half of the casing. Removal of the upper half of the casing must allow the rotating element to be removed without disconnecting the suction and discharge flanges. The upper casing is to be dowel aligned to the lower casing. Both halves of the casing must be self-venting to prevent vapor lock. Drain openings must be provided in the bearing arms for removal of lubricating liquid. Impellers shall be of the enclosed, opposed suction type and shall be of vacuum cast bronze ( _____ ). Impellers shall be dynamically balanced and securely fastened to the shaft by key and screw locked shaft sleeves.

The vanes shall be designed to reduce noise. The pump shaft shall be made of high grade SAE 1045 Steel or equal, accurately machined to give a true running rotating element. The minimum diameter acceptable will be _____". The shaft shall be protected from wear by bronze ( _____ ) sleeves which are key locked and threaded so that the sleeves tighten with rotation of the shaft.

EPR-O-rings must be provided between the impeller hub and the shaft sleeves to prevent pumped liquid from corroding the shaft.

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Engineering Specifications Model 431B Base Mounted (Continued) Pump shall be equipped with easily renewable bronze ( _____ ) casing rings so designed that hydraulic pressure will seat them against a shoulder in the pump case around the full periphery of the wearing ring. The wear rings will be locked in place by doweling to prevent rotation. The rotating element shall be mounted in heavy-duty grease lubricated ball bearings and equipped with bronze water slingers for packed pumps on side next to pump glands (neoprene slingers on mechanical seal pumps). Bearing housings shall be so designed to flush lubricant through and provide continuous cleaning of bearing surfaces and maximum protection against overheating. The bearing housings are to be of C.I. and shall be furnished with a set of regreaseable (Optional oil lubricated on Model 431B) bearings for both radial and thrust loads. The bearings shall have an average life of 250,000 hours and shall be mounted in machined, moisture and dust-proof housings.

The housings are to have register fits and then be bolted to the pump casing to ensure permanent alignment. Stuffing boxes

(packing) (mechanical seal) shall be placed on both sides of the pump centerline to seal the pump shaft. All standard mechanical seal pumps will have flushline from 2nd to 1st stage stuffing boxes. All packed pumps having a suction lift shall have a 1st stage lantern ring connected to the pressure side of the pump by a bypass line to the parting flange of the pump. The stuffing boxes shall be equipped with heavy, cast, glands. Pump and motor shall be mounted on a common heavy base plate of (steel drip rim) (formed steel) (structural steel). Pump and motor must be checked for alignment after the pump base has been installed and grouted in place, in accordance with the standards of the Hydraulic Institute. There shall be no strain transmitted to the pumps. The diagonal split case pumps shall be flexible coupled to a standard horizontal NEMA, _____ hp, _____ phase, _____ hertz, _____ volts, _____ RPM (drip-proof) (totally enclosed) (hazardous location) motor.

3500 RPM, 150 HP

Maximum Temperatures Standard Mechanical Seals High Temp. Mechanical Seals with Flushing at Seal Faces and Water Cooled Bearings Packing with Hardened Stainless Steel Shaft Sleeves

230° F

300° F

225° F Maximum case working pressure (all or any part can be suction pressure)* Power Series 2 250 psi Power Series 3A 450 psi Hydrostatic test pressure 675 psi (MAX)

Limitations Materials of Construction Description Material of Construction Casing Halves Cast Iron ASTM A48 Packing Rings Alternating Rings of Babbitt Foil and Arimid Fiber Case Wearing Rings Bronze ASTM B62 Sleeves Bronze High Lead Tin Impellers Bronze ASTM B584 Key Stainless Steel AISI 416 Shaft Steel AISI C1045

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EGISTERED QUALITY SYSTEM

800 AIRPORT ROAD, NORTH AURORA, ILLINOIS 60542 WWW.AURORAPUMP.COM

Monel® is a registered trademark of Special Metals Corporation.

Aurora® is a registered trademark of Pentair Ltd.

Because we are continuously improving our products and services, Pentair reserves the right to change specifications without prior notice.

A-02-1019 01/14/13 © 2013 Pentair Ltd. All Rights Reserved.