Engine Room Pumps

Dolphin Range

Pump Systems

Dolphin centrifugal pumps

reliability, accessibility and efficiency
The Hamworthy Dolphin range of marine centrifugal pumps have won wide acclaim for their reliability, accessibility and efficiency and are supplied to every shipbuilding and major industrial country throughout the world. The range is based on a single entry pump covering capacities from 10 to 500 m /h and a larger capacity double entry pump which extends the capacity capability to 2500 m /h, sufficient to cover any marine pumping duty likely to occur.
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Dolphin pumps offer over 80 years of centrifugal pump design and manufacturing experience and meet the increasing need for alternative forms of pump construction. The design provides considerable flexibility to offer alternative forms of construction to match customer needs, with maximum use of common parts, maintaining the economy of manufacture.

Hamworthy Dolphin pumps have a vast range of optional features to suit the particular needs of todays markets. The pumps are manufactured in Hamworthys factory in Poole, where both design and production systems are approved to the standard ISO 9000.

Benefits include
Easy dismantling - overhaul without disconnecting suction and discharge pipes

Alternative builds to suit customers requirements

Lubricated bearing and mechanical seal available for applications where long periods of dry running may occur

Suited to alternative priming arrangements

Minimum number of components

Suitable for water, white oils and lubricating oils

build flexibility
Single Entry Pumps 21 Different Constructions VIK
Inline branches, vertical shaft End suction, horizontal Bare shaft pump Rigid spacer coupling Flexible spacer coupling Direct close coupled Soft packed seal Mechanical seal Oil lubricated sleeve bearing Product lubricated sleeve bearing External ball bearings Electric motor drive Diesel engine drive Belt or flexible shaft drive Liquid ring primer driven from pump Hand or auto bladed primer Constant running bladed primer Air Ejector primer Central priming system Separate motor driven primer Submersible
Standard features Options available Special variations - note others may be available to meet particular applications

Double Entry Pumps HEF HEX VIB VID VIF

HEC

VIB

VID

VIF

Single entry pumps

matching performance to your needs
Spacer Coupled Capacities: 10-500 m /h Heads: 15-140 m
The vertical pump utilising either a rigid or flexible spacer coupling offers the user the advantage of being able to dismantle the pump for maintenance without the need to remove the driving motor.
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The rigidly coupled version can be supplied with either soft packed gland or mechanical seal, or when fitted in locations where dry running can occur, with a mechanical seal and an oil bath lubricated sleeve bearing.

The flexible spacer coupled pump is fitted with a mechanical seal and external rolling bearings.

Close Coupled Capacities: 10-450 m /h Heads: 15-130 m

Available in either a vertical or an horizontal configuration, the close coupled pump provides an economic and compact alternative to the spacer coupled unit.
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Dismantling of the close coupled pump entails removing the driving motor to permit removal of the pump cover, shaft and impeller as a single unit.

The rigid pump shaft incorporates an integral sleeve coupling with a unique method of transferring residual end thrust to the motor shaft in a manner that permits easy pump shaft replacement without the need to drill the motor shaft.

The vertical close coupled pumps are available with inline branches, whilst the horizontal pumps are available in the end suction version only.

Double entry pumps

Double Entry
The larger sizes of Dolphin pumps, those with branches above 200mm, are of the double entry impeller form. These units cover the capacity range from 400m /h to 2500m /h and are only available as vertical units. Pumps with branch sizes 250, 300, 350 and 400mm are available in rigid spacer coupling designs.
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Like their smaller counterparts these larger Dolphin pumps are characterised by the robust simplicity of the design and their ease of maintenance, which on the largest sizes, includes built in dismantling equipment.

Maximum for close coupled units 160 120 120

Head (m)

50 40 30 20 BC80 B/C/D125 B/C200 DB250 10 10

DB350

DB300

DB400 40 50 100 Flow m3 /h 2000

Dolphin Range Chart 50 Hz

Maximum for close coupled units 160 120 120

Head (m)

50 40 30 20

BC80

B/C/D125 B/C200 DB250

DB 300 DB 350 DB 400

10 10

20

30 40 50

70

200 Flow m3 /h

300

700

2000

Dolphin Range Chart 60 Hz

Dolphin the versatile pump

Eleven basic pump frame sizes make up the Dolphin range of single and double entry Dolphin pumps. The single entry pumps are available in a total of twelve different forms for each pump frame size. The double entry pumps are available in four alternative forms for each pump frame size. Each pump variant is described by the build code.

Primers
It is often necessary for a centrifugal pump to operate in situations involving a static lift of the pumped medium or where the pumped medium is a mixture of liquid and air/vapour. Under these circumstances the efficiency of the pump will depend on the effectiveness of the primer in removing the air/vapour.

Materials of pump construction can be varied to suit the pump medium but for the standard sea water and fresh water applications they are: Hamworthy manufacture a number of different types of primers suitable for use in conjunction with the Dolphin pumps. These range from the liquid ring type, driven either

Sea Water
Pump shaft - stainless steel Casing - bronze Impeller - aluminium bronze Wear rings - metallic

by belt from the pump shaft or independently by a separate electric driven motor to a venturi type air driven ejector.

Alternatively a customer may wish to make his own arrangements to prime a pump, using equipment from another source.

Fresh water
Pump shaft - stainless steel Casing - cast iron Impeller - aluminium bronze Wear rings - metallic

Inline End Suction

Vertical Horizontal

Basic Pump Size

Single Entry Single Entry Single Entry Single Entry Single Entry Single Entry Single Entry Double Entry Double Entry Double Entry Double Entry

B80 C80 B125 C125 D125 B200 C200 DB250 DB300 DB350 DB400

Typical Modular Construction Code

B200

Shaft Axis
Vertical Horizontal

V H

Pump Casing Options

Inline End Suction

I E

Pump Build
Close-coupled to prime mover, no pump bearing Close-coupled to prime mover, no pump bearing, steel mounting foot Close-coupled to prime mover, product lubricated, sleeve bearing Close-coupled to prime mover, oil bath lubricated, sleeve bearing Rigid spacer coupled to prime mover, product lubricated sleeve bearing Rigid spacer coupled to prime mover, oil bath lubricated sleeve bearing External roller bearings. Flexible spacer coupling to prime mover External roller bearings. Bare shaft extension Other special build not allocated individual code

Priming Options C K G H D B F X O
Non self-primed Air injector primed Liquid ring LRP50B belt driven Central priming system Hand operated rotary bladed primer Automatic rotary bladed primer Constant running rotary bladed primer Separate motor-driven primer Other special priming arrangements

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Total service support

With worldwide service support we are even better placed to offer you effective maintenance back-up on your Hamworthy pumping system. With our close connection with the marine industry over many years, our spares organisation is capable of responding to breakdown in a matter of hours. Where we are supplying a new pump, we can quote fixed price service contracts, allowing you to budget for your maintenance and ensure you obtain the best possible use from your installation.

Installation
No pump will give its best performance if badly installed. Typical installation errors such as lack of ventilation and poor foundations will affect the day-to-day performance of the pump and will shorten its operational life. We are prepared to advise you on installation work, which will, at an early stage, include assisting you with pump site selection.

Commissioning
Even if you install the pump (or you may have a portable system) we will undertake full commissioning for just a small charge. The commissioning service would include approval of the installation or corrective advice, filling-up with correct lubricants, full running checks and detailed operator training.

Worldwide sales and service network Our global network of sales and service centres ensures that we can provide first class technical, spares and service support to our customers wherever they are around the world. In addition to our sales and service locations, we are supported by agent representatives in all major shipping areas.

Hamworthy Pump Systems Fleets Corner, Poole Dorset BH17 0JT England tel: +44 (0)1202 662071 fax: +44 (0)1202 666363 e-mail: poolepumps@hamworthy.com

Hamworthy Pte. Ltd 15 Benoi Crescent, Jurong, Singapore 629 978 tel: +65 6261 6066 fax: +65 6261 6011 e-mail: singapore@hamworthy.com

Hamworthy Pump Systems AS Solbraaveien 10, PO box 53 NO-1371 Asker, Norway Enterprise No: 985 958 335 tel: +47 815 48600 fax: +47 815 48610 e-mail: pumpinfo@hamworthy.com

The manufacturers reserve the right to alter the specification and data to incorporate improvements in design. Certified drawings will be issued on request. All details copyright Hamworthy plc.
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Subsidiaries of Hamworthy plc

www.hamworthy.com