Engineering since 1904 MARITIME DIESEL ELECTRIC · 10308 West McNab Road · Tamarac, FL 3321 · Phone +1 (954) 597-7602 · Fax +1 (954) 597-7608 ·www.mardiesel.com [email protected]0. Ellehammer A/SEllehammer A/S is a modern engineering company and a leading worldwide supplier of high quality marine products, with an export rate above 80%. All products are manufactured individually in close cooperation with both customers and a wide range of sub-contractors, and fulfill all demands from respective classification societies. Ellehammer produce Ejectors, Emergency fire pumps, T ransfer pumps and Electrical control systems. The Ellehammer name has been manifested as a reliable, innovative and constructive brand ever since 1904. Where the company was founded by the Danish inventor J.C.H. Ellehammer, who amongst several inventions made the first powered flight in Europe in 1906. EjectorsThis is a static pump, for suction of any substance, motivated by a (Centrifugal)- pump. The ejector can be used for all suction purposes. Ellehammer Ejectors are customized to every customer for o ptimal performance. Emergency fire pumpsFire pump for offshore industry e.g. FPSO, LNG, FSO and rigs. Transfer pumpsHydraulic driven pump for transfer of fuel oil.Electrical control systemsCustomized control panels for engine or pump systems.
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Ellehammer A/S is a modern engineering company and a leading worldwide supplier of high
quality marine products, with an export rate above 80%. All products are manufactured
individually in close cooperation with both customers and a wide range of sub-contractors,and fulfill all demands from respective classification societies.
Ellehammer produce Ejectors, Emergency fire pumps, Transfer pumps and Electrical control
systems.
The Ellehammer name has been manifested as a reliable, innovative and constructive brandever since 1904. Where the company was founded by the Danish inventor J.C.H. Ellehammer,who amongst several inventions made the first powered flight in Europe in 1906.
Ejectors
This is a static pump, for suction of any
substance, motivated by a (Centrifugal)-pump. The ejector can be used for all suction
purposes. Ellehammer Ejectors are
customized to every customer for optimal
performance.
Emergency fire pumps
Fire pump for offshore industry e.g. FPSO,LNG, FSO and rigs.
In this booklet you will find information about Ellehammer ejectors. The booklet provides informationfor selecting and installing ejectors.
This booklet gives an overview of our standard ejectors. Requests for special ejectors can be retrieved
from our sales department.
Ellehammer has many years experience with ejectors, which has resulted in high performance andhigh quality of every ejector. Ellehammer ejectors are specially designed for every customer need foroptimal performance, it is especially the dimensions of bore and nozzle which is essential.
A table of content is found behind the index page.
This first section of the booklet gives an Introduction to ejectors.
The Product range section provides an overview of Ellehammers standard ejectors and describes theadvantages of each ejector. This section will also guide you to select the best ejector for individualusage.
The section Capacity range contains diagrams of each ejector type, which provides an overview ofindividual ejector capacity. This section can therefore help to select an ejector, however, the finalselection will be performed by Ellehammer sales department in order to calculate the optimaldimensions of bore and nozzle.
The section Design & Installation will guide you towards a successful installation of an ejector. Firstsome general guidelines will be explained in order to achieve maximum performance of the ejector.This section also describes how to design and install ejectors with ballast tanks.
The end of this section contains guidelines for error correction, these guidelines can help you topinpoint errors and solve common problems.
Details of the individual ejectors can be found in the section Performance diagrams & Dimensional sketches. This section contains an overview of the different sizes of each ejector type. Theperformance diagrams clarify operating details of specific ejectors. The dimensional sketches informsof the most important dimensions needed for designing and installing an ejector into a system.
The section which contains Inquiry form will help you to provide basic information for inquiries.
Ellehammer A/S has a world wide network of representatives of ejectors, information about these can
be found in the section Representatives.
Further information can be received by contacting our sales department; contact details in the orange
1.1.1 Ejector parts An ejector consist of 3 parts dependent on ejector size
1. House
The house is the central part of the ejector, containing the suction and motive inlet, this
is also where the suction capabilities emerge.2. Diffuser
The diffuser is situated after the house or the intermediate pipe. The diffuser containsthe process of mixing and ejecting the motive and sucked medium.The inner diameter of the diffuser can vary by specific performance requirements.
3. Nozzle The nozzle is mounted in the house with the purpose of regulating the motive jet
stream.
The nozzle can vary in dimensions for achieving specific performance requirements.
The nozzle is made in stainless steel.
1.1.2 Functionality Ejectors are pumps of a very simple construction. In principle an Ellehammer ejector works by means
of a high velocity jet of medium (water or gas) shooting through a circular duct, which will carry the
surrounding fluid with it. In this duct, the jet and suction fluid are gradually mixed while increasing thepressure. This pressure will further increase in the diffuser while the velocity is lowered to a level
suited for normal piping.
Having no moving parts, ejectors are sturdy and need no maintenance. They are contrary tocentrifugal pumps always self-priming, and may be designed to create almost perfect vacuum.
1.1.3 Motive mediums The motive medium drives the ejector. This medium is always injected in the ejector at higher
pressure than atmosphere. Several different mediums can be used as motive mediums. The mostcommon are water and air; less common are exhaust and gasses.
Basically, the ejector can be motivated by any medium up to a certain viscosity level.
Water is the most efficient medium to drive the ejector.
Air can be a preferable medium to use when pumping gasses.
1.1.4 Suction mediums Many other applications exist for ejectors, where a liquid (or slurry) needs to be pumped or a vacuum
created using either liquid or gas as the motive source. There is one exception, though; pumping ofliquid using compressed gas will usually be too inefficient to be of practical use.
Solids Liquids Gasses
Mediums
Small particles Sewage Fuel/Oil Water Steam Smoke Air
Solids Small particles
Include mediums such as sand, powder and coal powder.
Liquids Sewage
Sewage is characterised by a combination of water and slurry, this includes all sorts of sewagewater and bilge.
Fuel and oil
For transferring and stripping of all types of fuel and all types of oil, using an ejector eliminates
explosive risk.Water
For removal of any type of water from e.g. ballast tanks, cargo tanks
Gasses
Gas
For emptying of gasses from ballast tanks or other tanks. The ejector has no moving part whicheliminates explosive risks.
Smoke
Ejectors can be used for ventilating and suction of smoke, this can be relevant in the engine
rooms.
Air/vacuum For priming of centrifugal pumps or other vacuum purposes.
1.2 Advantages and disadvantages of ejectors Advantages
1.3 Areas of installation Ellehammer ejectors are used in a large range of applications in different industries. Main industriesare the maritime industry and process industry.
Process industry:
ChemicalPetrochemical
Petroleum
Food and Drugs
Marine industry: Stripping
systems Vacuumsystems Ventilation
systems Mixingsystems
Maritime industry
The following picture illustrates where ejectors can be installed on vessels.
Filling and stripping of ballast tanks.
Stripping of bilges from the bottom of the vessel.
Stripping of all sorts of mediums from cargo holds. Includes Oil, Gas, Water
and sewage.
Stripping of bilge from chain lockers
Ejectors in the engine room can both be used for stripping of bilge and for
ventilation of exhaust or other gasses.
Incinerators Removal of ashes from incinerators
Multiple use Portable ejectors are designed for multiple suction purposes. These ejectors
can be installed with hoses, in order to utilize the ejector various places onthe ship.
Portable ejectors are favourable to use where various suction quantities are
low or where coarse vacuum cleaning are needed.Peak tanks Peak tanks are situated either in the front or the rear of the vessel. Ejectors
can both be used for stripping and filling these tanks.Priming Priming of centrifugal pumps. This ejector creates vacuum which will
Ellehammer A/S is a modern engineering company and a leading worldwide supplier of high quality ejectors for
the maritime industry. All ejectors are customized in close cooperation with our customers, especially ourextensive knowledge gathered through 60 years, will provide you one of the best ejectors on the market.Through our 60 years experience we have developed many ejectors, and can therefore help you with any suctionneed.
Our wide range of ejectors fulfils all demands from respective classification societies.
Applications 1 Cargo tanks and ballast tanks - 1
Peak tanks and chain lockers - 2
Sewage and bilge water - 3
Desalt/Brine systems - 4
2 Transportable - 5
Priming of centrifugal pumps - 6
Ventilation - 7
Advantages Long lifetime and extreme robust
3High reliability
Simple to install and operate
Low maintenance
5 Materials
4Bronze
Aluminium bronze
Stainless steel
Facts
More than 40 years experience
6 More than 70.000 delivered All ejectors are designed, manufactured
2. Product range This section provides an overview of Ellehammers standard ejectors and describes the advantages of
each ejector. This section will also guide you to select the best ejector for individual usage. hereafterEllehammer sales department will calculate the optimal dimensions for bore and nozzle, so you can
achieve optimal performance of your ejector and your pumping system.
Ellehammer offers also a variety of products to ejectors eg. Additional flanges, hoses and many other
requirements.
2.1 Ellehammer ejector types Ellehammer offers six types of ejectors:
Standard ejectorsIn-line ejectorsWater motivated
Our In-line ejectors have the best efficiency and are therefore our mostcommonly sold ejector type. The motive water is coming from the side andsuction is created In-line.In line ejectors over size 125-150-150 has inspection covers.
Area of use: Ballast tanks, Cargo tanks etc.
More information can be found in section 5
Side suction ejectors
B-type ejectorsWater motivated
Differs in two ways from the In-line ejector. The motive water is coming from
the end and suction is created from the side and it is equipped with an
inspection cover. Ejectors of all makes and designs may be clogged up byparticles. Whereas soft matter normally will pass through the ejector solid
particles larger than the gap between the nozzle and the throat will getcaught in the narrow passage and eventually cause the ejector to cease
pumping. With Ellehammer B-type ejectors the foreign matter can easily be
removed through the inspection cover.Additionally the B-type ejector can be constructed with enlarged gap
between the nozzle and the throat, which makes it suitable for sewage use.
Area of use: Bilges, Engine room, Chain locker etc.
Are designed for sewage use, this ejector allows large particles to pass
through the ejector. Area of use: Sewage, Bilges, Incinerators etc.
More information can be found in section 7
Portable ejectorsT-type ejectorsWater motivated
Are used where a fixed ejector is not required. Ellehammer produce twodifferent sizes of portable ejectors. These ejectors are connected with Storzcouplings.
Area of use: Cleaning of tanks, several smaller tanks etc.
More information can be found in section 8
Priming ejectors Inch-type ejectors
Air & water motivated
Are used for 2 purposes: Priming of non-self priming centrifugal pumps and
small suction purposes. These ejectors are motivated by air or water. Area of use: Priming of centrifugal pumps, small suction purposes etc. More information can be found in section 9
Desalt ejectors are specially designed for desalting systems/ Fresh water systems,where the ejector is used to suck brine out of the system. The ejector is thereforeonly a minor part of this system. We deliver many different desalt ejector types,contact us for further information.
Venting ejectors
V-type ejectorsWater motivated
Our venting ejector is specially designed for suction of large amounts of gasses eg
All ejectors can be specified by two types of numbers. The model number describes a specific ejectortype and size. A different number is marked on every ejector, the serial number.
Model number This number describes a specific ejector measured by 6 numbers. All measurements in millimetre.
Motive Inner diameter of motive inletSuction Inner diameter of suction inletDischarge Inner diameter of discharge outlet
Type B, S, T, BV or none which is equal to in-line ejectors
Bore Inner diameter of boreNozzle Inner diameter of nozzle
Information regarding parts can be found in section 1.
There are three priming ejectors ½, ¾ and 1, See section 9.
Motive Suction Discharge Type
Serial number All ejectors are marked with serial numbers
Eg. 40-70-70 S
which identifies a specific ejector, which makes it
easy to reorder.
The number can be located on the flangesbetween the house and the diffuser. The numberis always marked on the opposite side of the inlet
Both SS AISI 329 and Monel 400 are alloys known as well suited for ejector nozzles. The following is a
comparison between the data available from the suppliers of Monel 400 and SS AISI 329.
Monel 400 Stainless steel AISI 329
Composition Ni 63 % min
C 0,3 % max
Mn 2,0 % max
Fe 2,5 % max
S 0,024 % max
Si 0,5 % max
Cu remainder
Cr 26 %
Ni 5 %
Mo 1,5 %
C < 0,04 %Fe remainder
Structure: Solid solution
Tensile strength 570 Mpa
Elongation 45 %Hardness HB 150
Corrosion resistance: in sea water
More resistant to corrosion than its principal
constituents, nickel and copper. Excellentservice under high-velocity conditions, where
cavitations erosion is important.
Structure: Ferritic-Austenitic
Tensile strength 690 Mpa
Elongation 30 %Hardness HB 220
Corrosion resistance: in sea water
Excellent corrosion properties particularly as
regard to pitting, crevice corrosion, stresscorrosion and corrosion fatigue.
Superior to AISI 316 in chloride-bearing
environments.
Both materials show excellent resistance to corrosion in sea-water. But AISI 329 is a little more
resistant to mechanical-wear than Monel due to the superior hardness.
Therefore Ellehammer A/S has been using AISI 329 for more than 20 years as the standard materialfor nozzles in marine applications. During this period the stainless steel AISI 329 has proven itself asan excellent choice for ejector-nozzles. We can therefore guarantee the durability of this material.
This section visualise the Ellehammer ejectors capacity range, these are visualised by
diagrams.
With the diagrams you will be able to find several suitable ejectors for your purpose; thereby
you will have an idea of the dimensions. Remember that the diagrams can not be used for finalselection of ejectors, which must be performed by the Ellehammer A/S sales department.
When reading the diagrams it is important to consider 3 important variables which affect the
performance of ejectors, these are:
- Suction height
- Delivery height - Motive pressure
Additionally it is important to have sufficient motive water.
Each ejector column in the diagrams span over awide capacity range, this is dependent on thedelivery height and the motive pressure, See thebox to the right.
Select the upper of the
column if you have:
Select the lower of the
column if you have:
High pressure Low delivery height
Low pressure High delivery height
Additionally the diagrams has been divided by
water suction column, see the three colours tothe right.
= 3 Meter water column(suction)
= 5 Meter water column(suction)
= 7 Meter water column(suction)
As standard ejectors are delivered with flanges, but if they are marked with a star, they are:
* Delivered only with threaded connection.** Delivered with threaded connections or flanges.
In general a straight length of pipe at the connections of the ejector is not required. All the testing ofEllehammer ejector is performed at the test plant in Glostrup Denmark with a bend directly before thesuction connection. Hence the ejectors specified by Ellehammer A/S will perform according tospecifications even when fitted with a bend directly to the ejector suction connection.
Recommendation:
Very sharp bends should be avoided; bend radius should be 1.5 times the pipe diameter or
more.
On the discharge side, if possible, a straight pipe of not less than 3 times the diameter should
be mounted, this to avoid possible pitting problems in the following bend.
On the suction side, multiple bends in different planes should be avoided, as this will cause arotating flow, which may adversely affect the suction capacity. If this is not possible a straightlength of 10 times the diameter should be installed either between the bends or between thelast bend and the ejector. Multiple bends in the same plane will not have this effect and a
An ejector is designed to operate at exact motive pressure and motive capacity; this section will clarify
what happens if the motive flow changes.
Specification of ejectors will be delivered with the individual ejector. It is recommended to follow the
specifications.
The specified motive flow is measured at the ejector entry, friction within the piping to the ejectorshould be considered in each individual installation, particularly, long distance to the pump, manybends on motive piping and varying pipe dimensions should be taken into account.
Changing motive flow can result in:Varying motive flow will decrease ejector performance.
Decreasing motive flow from the specifications might result in insufficient or none performing
of an ejector.Increasing motive flow might cause the ejector to malfunction.
Ejectors are designed for maximum suction capacity, therefore, increasing motive flow might
not increase suction capacity.
Pumps are often designed to operate a specific operating point. The pump, however might deliver anyvariety of capacities up to its maximum depending on the pressure. The pump supplier documents thisby a performance curve/diagram.
Performance diagrams visualise efficiency of ejectors. The graph shows operating details for theejector measured by total meter water column (horizon) and suction capacity (horizontal). The graphis a measurement of static performance.
The vertical line express total meter water column. The total meter water column is an addition ofsuction height and delivery height. Suction height is defined as the height from suction point to theejector. Delivery height is defined as the height from the ejector to the discharge.
Total suction capacity is defined as the amount of sucked medium, measured in cubic meter pr. hour.
The graph should be read from left to right, followingthe colour pattern from yellow over green and endingwith red.The graph is beginning with high water column andlow capacity, this is visualised by the yellow line,meaning that the ejector will function with lowefficiency.As the water column decrease the capacity increase,this effect can be seen as the yellow colour changes togreen. The green fraction of the graph visualise bestefficiency of the ejector, and this is the normaloperating range.
At the end of the green area the graph is breaking,meaning that the ejector has reached its maximum
performance level. The breaking point should at all
times be avoided, because of the high possibility ofnon performing ejector visualised by the red fraction.
Suction capacity (m3/h)
4.7 Start up & After sales
Start up
Open the motive water valve and check that the motive pressure gauge shows the correct pressure.
The ejector will prime and function within few seconds.If the ejector has zero or insufficient performance, please see section 4.8.
After sales
You are always welcome to contact us for after sales service see our contact information at the
bottom of the page.If you have questions about previous orders, then please refer to the ejector drawing for part numbers.
You will be asked for the ejector type number and serial number. See section 2.3
6. B -Type Ejectors - Dimensions and weights Side suction water motivated
B-t ype ejectors differs in two ways from the In-line ejector. The motive water is coming fromthe end and suction is created from the side and it is equipped with an inspection cover.Ejectors of all makes and designs may be clogged up by particles. Whereas soft matternormally will pass through the ejector solid particles larger than the gap between the nozzleand the throat will get caught in the narrow passage and eventually cause the ejector to ceasepumping. With Ellehammer B-type ejectors the foreign matter can easily be removed throughthe inspection cover.
Additionally the B-type ejector can be constructed with enlarged gap between the nozzle andthe throat, which makes it suitable for sewage use.
*Without flanges, installation by threads.
All flanges can be drilled according to DIN Pn 10, ANSI, JIS standards or other requirements.
14. Representatives Ellehammer A/S has several representatives around the world. These representatives can
help any customer regarding product information and technical questions.Some representatives also supply complementary products to Ellehammers in form of
pumps, pipe equipment and various other types of equipment.
China Representative office China D.C Marine Supply Phone: +86 21 5465 7660