eagleburgmann k-kde e2 competence in compressor sealing 28.07.2015

8/20/2019 EagleBurgmann K-KDE E2 Competence in Compressor Sealing 28.07.2015

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Competence incompressor sealing

Rely on excellence


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EagleBurgmann at the forefront of technology:Milestones in innovative product development.

1989EagleBurgmann presents the rst bi-directional gas seal, opening up new

dimensions in the use of gas-lubricatedmechanical seals.

1992EagleBurgmann introduces the rst DLC-coated (Diamond-Like Carbon) siliconcarbide seal faces into practical use,

achieving excellent wear-resistance inthe low-speed range.

2012Dry gas seals can now be used to pumpwater/oil/gas mixtures: EagleBurgmannDF-(P)DGS6 seals with DiamondFacebonding are brought into practice inmultiphase pumps.

2014Established technology: compressorson over 45 LNG tankers and morethan 35 oil platforms are sealed withEagleBurgmann gas seals.

1999EagleBurgmann develops the rst gasseal for low-temperature applications(-170 °C / -274 °F) for market launch.

These are used, in particular, incompressors and companders on LNGcarriers.

2009The world’s largest and “hottest”gas seal (+250 °C / +482 °F) - anEagleBurgmann PDGS - is brought intoservice in China.

Important note

All the technical specifications are based on extensive tests andour many years of experience. However, the diversity of possibleapplications means that they can serve as guide values only.

It should be noted that the extremal values of each operatingparameter cannot be applied at the same time because of theirinteraction. Furthermore, the operating range of each specificproduct depends on the respective shaft diameter, materials used,mode of operation and on the medium to be sealed.

A guarantee can only be given in the individual case if the exactconditions of application are known and these are confirmed ina special agreement. When critical conditions of operation areinvolved, we recommend consulting with our specialist engineers.

Subject to change.


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1988EagleBurgmann develops thecharacteristic three-dimensional

V-grooves. This solution provides thebest lift-off properties, even at lowspeeds and optimum gas lm stiffness,for safe operation.

2008With the coaxial gas-lubricatedCobaSeal, EagleBurgmann revolutionizesthe use of separation seals for

compressors and outstrips all existingsystems on the market with respect toleak prevention.

2010EagleBurgmann launches the rstdiamond-coated seal faces for gasseals. The EagleBurgmann DiamondFacetechnology is used successfully forapplications in critical operating modes.

2009EagleBurgmann launches the innovativeRoTechBooster - the rst booster systemfor supplying pure gas continuously andreliably to compressor seals.

The sealing specialistEagleBurgmann is one of the leading systemsuppliers of sealing technology forcompressors. We have used our innovative

approach to shape this high-tech sector forgas-lubricated mechanical seals since theearly 80s.

We offer our customers – OEM, EPC and endusers – a technically mature and well-established portfolio of rugged standard gasseals with appropriate gas supply systems.This is combined with engineered solutionsdesigned for specific applications anda long-term global service concept.Decades of experience, outstanding designand calculation expertise and state-of-the-art,top quality production make us stand out toour customers. This is reflected in longeroperating periods and MTBF, greater processsafety and increased availability for bothcompressor and plant.

High-end sealing technologyEagleBurgmann gas seals are used in all typesof compressors to seal the shaft. Applicationsinclude compressors for oil and gas processes,pipelines, refinery equipment and thepetrochemical and chemical industries.

The demands that manufacturers, operatorsand the environment make in terms of safety,sealing and robustness are challenging. TheEagleBurgmann solutions are not onlytechnically safe, but they are also highlycost-effective.

Dry Gas Seals in all arrangements (single,double, tandem and tandem with intermediatelabyrinth), aerostatic and aerodynamicseparation seals, custom-designed sealmanagement and booster systems to ensure

a continuous gas supply - with EagleBurgmannyou will receive everything from a singlesource. Without compromise.

Full service partnerResearch and development, consulting,engineering, design, production and a broadrange of modular services are competenciesthat our customers demonstrably use totheir benefit. Our comprehensive network ofspecial centers of competence around theworld supports our customers with assembly,overhaul, repair and acceptance testingservices.


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Experience, demand and commitment:The building blocks for optimized sealing solutions.

Reliable market partnerwith worldwide presence

With over 60 subsidiaries and 250 locationsworldwide, we use our global focus to the benefit ofour customers. Thus our production network, whichhas plants in Europe, Asia, North and South America,ensures that we are always in line with marketrequirements and that we can produce on attractiveterms and are able to supply regional markets.

We also have a comprehensive network of sales andservice centers which covers every important

economic region. Being close to our customers alsomeans we are precisely acquainted with theirprocesses and individual requirements.

EagleBurgmann is part of the German FreudenbergGroup and the Japanese EKK Group. We have accessto all the resources we need to offer optimumsupport to major customers at the international leveland also become their long-term, reliable partner.

Consulting and engineeringwith meaning

Technical expertise grows from knowledge. This doesnot only have to mean knowledge of sealingtechnology, it also takes into account thecompressors, plants and systems used and theindustrial processes and process conditions.

Knowledge management helps us keep ourcomprehensive knowledge up to date and make itavailable to the entire company. We use databases,courses and training to develop our employees and

bundle our expert knowledge from all around theworld.

Our dedicated and committed employees use thiswide and varied know-how to give our customerswell-founded advice on how to choose the bestsealing solution from the technical and economicviewpoints and how to calculate and designaccording to need.

High-levelresearch and development

We invest a great deal in research and developmentin order to consistently improve the performance ofour products. EagleBurgmann carries out publiclysponsored research projects and works together withinstitutes and universities. Joint projects withcustomers and suppliers are a regular source of newsolutions.

Two large research and development centers inGermany and Japan, combined with a worldwide

network of testing facilities, allow us to respondflexibly to the requirements of our customers.


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Broad standard product portfolio andcustom solutions

Largely standardized and modular product series arean essential part of our gas seal portfolio. But wealso offer individual solutions and provide thenecessary development, engineering and productioncapacity. Using the latest calculation and designmethods, such as 3D-CAD, we adapt our products tocustomer-specific requirements or design newsolutions.

EagleBurgmann produces to the most exacting

internal and external standards. We use ultra-modernequipment, optimized and standardized productionprocesses and a great vertical production range – allbuilding upon the reliable base of our excellentemployees. Our quality management systems are ISO9001 certified, for example.

Protection of humans, theenvironment and industrial plants

Safety is an elementary requirement for industrialsealing technology. It is ultimately all about protectingpeople, the environment, products and resources.A lot of what EagleBurgmann does goes far beyondthe legal requirements. This sense of responsibility ispart of the company culture and is firmly anchored inthe guiding principles of the group.

Our environmental management system is ISO 14001certified and our work safety management system

fulfils OHSAS 18001. Regular audits and numeroustraining courses raise awareness in employees andmanagement alike. This develops a culture in whicheveryone feels responsible for work safety, theenvironment and health protection within thecompany and on our customers’ own premises.

Modular service concept ensuresmaximum flexibility

Products and services are two sides of the samecoin. Professional installation and commissioning,practical knowledge transfer, intelligent inventorymanagement and regular servicing and maintenanceextend service life and protect investments.

The need for services varies according to theoperator and the system and is as diverse as theindustry itself. Failure mode analysis, tailored onsiteservices and engineering services related to sealing

technology play an important role.

Be it for individual sealing systems, critical processelements, specific plant units or a comprehensiveservice agreement for entire plants - ourTotalSealCare modular service concept has thesolution for every requirement. The individual servimodules can be combined as needed to ensuremaximum flexibility.


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Lifted-off, non-contacting and efficient:This is how gases are sealed.Key sealing components

Reliable sealing of the process gas plays animportant role when running compressors. Differentsystem components are used depending on themedium, operating conditions, type of constructionand how it is operated.

•Main seal (e.g. DGS, PDGS): Seals the shaft fromthe bearing side. Available as a single, double,tandem or tandem seal with intermediate labyrinth.

•Separation seal (e.g. CSR, CSE, CobaSeal): Sealsthe bearing oil in the compressor drive from thesealed space. Available as non-contacting or lift-offcarbon ring seals and as aerostatic lift-off gas-lubricated seals.

•Seal management system (e.g. SMS): Suppliesthe main and separation seals with separation, sealor buffer gas and monitors the sealing system forhealth of the seal.

•Booster system (e.g. RoTechBooster): Continuousgas supply when compressor is operating slowly oris stopped.

How gas-lubricated mechanical seals work

Uni-directional V-grooveGas enters into the three-dimensional V-grooves andbetween the seal faces by rotation. Due to shear ofthe gas, pressure increases and a stable gas filmestablishes. This results in lift-off of the seal facesand allows non-contacting running. The sealing gapis just a few micrometers, so any leakage flows areminimal. The sloping base of the groove creates aneffective self-cleaning effect.

Bi-directional U-grooveThe U-groove works in the same way as theV-groove, with the difference that the U-groove isbi-directional. The shape of the groove is againthree-dimensional. The gas entry occurs in themiddle of the groove and builds up pressure anda gas film against the direction of rotation.

A C D

S

B

S

PCV

FIT

7

PCVPCV

PCV

PIT

FIT

PIT

FIT

PIT

PDIT PDIT

FO

FO

FO

FO

FOPIT

3 32 2

4 5 6

8

9 N2

1

Item Description1 Compressor2 Dry Gas Seal3 Separation seal4 Primary seal gas line or buffer gas line5 Secondary seal gas line6 Separation gas line7 (Primary) vent line8 RoTechBooster module9 Gas conditioning skid connection (option)

A Primary seal gas supplyB Primary ventC Secondary seal gas supplyS Secondary ventD Separation seal gas supply

Gas entry

Direction of rotation

Pressure increase

Gas entry

Direction of rotation

Pressure increase


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Basic arrangements

Four seal arrangements are used according to the application and type of machine: single seal, double seal, tandem seal and tandem seal with interEach arrangement may be optionally equipped on the bearing side with a labyrinth, aerodynamic (CSR) or aerostatic (CSE) carbon rings or a coax

Single sealApplication: where leakage of the product into the atmosphere is not harmful, e.g.from air or nitrogen compressors or the axial cavity does not allow a tandem seal(e.g. geared compressors). This version allows process gas leakage to thecorresponding flare / vent connection. Primary seal leakage is dissipated with theseparation gas to the vent. The gas to be sealed must also be filtered and routedto the seal chamber via connection “A”. The resulting flow from the sealed spaceto the impeller side prevents contaminated / wet gas reaching the Dry Gas Seal

on the process gas side, e.g. towards the labyrinth.

Tandem sealApplication: where no N2 is available and minimal process gas leakage to theatmosphere is acceptable, e.g. gas pipeline compressors. The seal on the bearingside is intended as a safety seal. The tandem arrangement offers particularly goodoperational safety. The process side and bearing side seals are able to withstandthe full pressure. In normal operation, only the process side seal reduces the fullpressure. The space between the process side and bearing side seals is routed tothe flare via connection “B”. The pressure to be sealed on the bearing sidecorresponds to the flare pressure. There is thus very little leakage to the bearingside or to the vent. If the primary seal fails, the secondary seal is activated asa back-up and operates at primary seal conditions.

Double sealApplication: where product leakage to the atmosphere/flare is unacceptablelow pressure applications. Seal gas leakage into the product needs to bepermitted (seal gas pressure p3 > p1). This is used when a neutral seal gas isavailable at the appropriate pressure. Typical applications can be found in thchemical and petrochemical industries, e.g. in HC gas compressors. A seal ge.g. nitrogen at a pressure higher than the product pressure, is supplied betwthe seals via connection “C”. Part of the seal gas leakage dissipates to the

bearing side, while the other part goes to the product.

Tandem seal with intermediate labyrinthApplication: where product leakage to the atmosphere is unacceptable, e.g. 2,ethylene or propylene compressors. With this type of seal, the product pressbe sealed is reduced via the seal on the process side. The entire process gasleakage is routed to the flare via connection “B”. The bearing side seal ispressurized with secondary seal gas (nitrogen) via connection “C”. The preof the secondary seal gas ensures the flow through the labyrinth to the flare/tapping point.

7

L a

b y r i n t h

i l l

A B D

B e a r i n g s

i d e

P r o c e s s s

i d e

1 2

A C S D

B e a r i n g s

i d e

L a

b y r i n t h

P r o c e s s s

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A B S D

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L a

b y r i n t h

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1 2 3

4

7

A Seal gas supplyB VentD Separation seal gas supply

1 Gas seal2 Separation seal

A Buffer gas supplyC Seal gas supplyS VentD Separation seal gas

supply

1 Primary seal2 Secondary seal3 Separation seal

A Primary seal gassupply

B Primary ventS Secondary ventD Separation seal gas

supply

1 Primary seal2 Secondary seal3 Separation seal

A Primary seal gassupply

B Primary ventC Secondary seal gas

supplyS Secondary ventD Separation seal gas

supply

1 Primary seal2 Secondary seal3 Separation seal4 Intermediate

labyrinth


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Face materials and seal face finishtechnology

EagleBurgmann uses mainly silicon carbide (SiC)

against silicon carbide as the sliding material pairing.For specific applications (e.g. CO) carbon graphite isoptionally used for stationary seal faces. Thesecombinations are extremely robust and durable andhave proven their worth in thousands of standard,high pressure and high speed applications.

Dry gas seals must never run in contact mode atmoderate to high sliding speeds. However, contactoperation does occur during start/stop, and mightoccur for a certain time in coast-down and turningoperation. To avoid any damage in temporary lowspeed contact operation, the seal faces need to beprotected.

To ensure a long service life and to allow seals to rununder extreme conditions, EagleBurgmann offersthree different seal face finishes according to theapplication and design of the seal: DiamondFace,Diamond-Like Carbon (DLC) and titaniumnitride (DM-TiN). Each of these coatings has its ownstrengths to suit specific requirements.

DLC (Diamond-Like Carbon)

This hydrogenated amorphous carbon coating (a-C:H),applied by plasma enhanced chemical vapour

deposition (PECVD), features excellent wearprotection and friction reduction for silicon carbideseal faces. The high hardness and the speciallydesigned surface offer great protection againstscoring. DLC is used as standard coating for siliconcarbide seal faces and is only surpassed by theextraordinary properties of the DiamondFace coating.In terms of material properties, the a-C:H DLC coatingis to classify between diamond and carbon graphite.

DM-TiN titanium nitride

The DM-TiN titanium nitride coating applied bydynamic ion beam mixing (standard: 1.4006/SU410,Japanese pat. no. 2134661) has excellentmicrohardness and adhesion properties as itpenetrates into the metal, bonding with it extremelywell. Titanium nitride coatings are used to protect themetal seal faces of compressor seals (e.g. MDGS)against scoring. DM titanium nitride/carbon graphitepairings have a favorable friction coefficient andextremely good emergency running properties.

Design and calculation

EagleBurgmann compressor seals consist of twostructural modules: The standardized inner parts of

the seal (core parts) and the adaptive parts, whichare individually matched to the installation location(housing, shaft sleeves, connecting parts, etc.). Thissystem enables us to optimally match customerrequirements with the conditions of use.

Seal design and optimization requires a profoundphysical understanding of the seal behavior.Theoretical knowledge combined with most efficiencomputational analysis methods allow us to designhighest-performance standard seals as well as veryspecial seal designs adapted to particular customer’srequirements. Whenever required, computational fludynamics methods (CFD) for flow field analysis andfinite element methods (FEM) for structural analysiwill be applied to investigate all necessary details ofthe inner seal environment such as stress, deflectionand temperature distribution.

Production and testing

High-tech production methods, state-of-the artmachines, maximum precision in all productionprocesses and the best-trained employees are thekeys to excellent and reproducible quality.EagleBurgmann compressor seals are produced inGermany (Eurasburg). The second production locati

is Japan (Niigata).

Right after production and assembly all dry gas andoil-lubricated compressor seals are going througha pass-off test on our test rigs. Realistic operatingconditions, tight checking criteria and detaileddocumentation will ensure that every EagleBurgmancompressor seal leaves the plant at the highest levelof operational reliability.

DiamondFace

In 2007, EagleBurgmann created a landmark inmechanical seal technology with the introduction ofDiamondFace. A microcrystalline coating with all theattributes of natural diamond is applied to the sealfaces by chemical vapor deposition (CVD) at2,000 °C (3,632 °F) in a vacuum reactor. Thickcoating coupled with extremely flat and uniform sealfaces characterize this procedure, which wasdeveloped together with the Fraunhofer Institute forSurface Engineering and Thin Films in Braunschweig,Germany. The coating adhesion exceeds all known

practical requirements.

Seal faces with DiamondFace offer excellent thermalconductivity, are extremely hard and resistant towear and exhibit low friction and highest chemicalresistance. For compressor seals, the service life ismultiplied several times for critical applications, themaintenance intervals are extended accordingly andthe life cycle costs can be greatly reduced.

Video: DiamondFace


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EagleBurgmann offers a fine-tuned portfolio of Dry Gas Sealsthat covers a wide range ofapplications.

The following pages contain an overview ofour main series. All seals are generallyavailable in the commonly-used arrangements(single, double, tandem and tandem withintermediate labyrinth), with or withoutseparation seal. You can also expect to findinnovative technical and economical solutions,such as the combination of single seal with anseparation seal or ultra-high pressure sealsfrom the PDGS series for special applications.

DGS standard sealsPDGS high pressure sealsMDGS for screw compressorsTDGS for steam turbinesNF941 for special applications

WRS oil-lubricated compressor sealsEBU800 oil-lubricated compressor seals

These are well-established and rugged sealingconcepts for many different applications inscrew compressors but are also suitable for

centrifugal compressors. They are used, forexample, in closed process circuits from whichas little gas as possible should be allowed toleak, but where a slight oil leakage into theprocess can be tolerated.

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compressor seals


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DGS

Seals from the DGS series are the standard for mediumpressures up to 120 bar (1,740 PSI). They have proventheir suitability in thousands of applications worldwide.They are very rugged with a mature design concept.The advantage over the competition is hidden in the detail.For example, the torque is transmitted to the rotating seatby friction forces only. And thus no holes and resultingweakening of the material are needed.

Features• Gas-lubricated

• Uni-directional or bi-directional• Ready-to-fit cartridge unit• Single, double, tandem seal and tandem withintermediate labyrinth available

• Separation seals as labyrinths, radial clearance sealsor CobaSeal are optionally available

Advantages• Wear-free and contact-free operation• Self-cleaning 3D gas grooves• High gas film stiffness• Secure cupped retainer for seat• Available in various materials for optimized chemicalresistance

• Proven, reliable and economical solution

Operating rangeShaft diameter: Ds1 = 29 … 264 mm (1.14" … 10.39")Pressure: p = 0 … 120 bar (1,740 PSI)

Temperature: t = -20 °C … +200 °C (-4 °F … +392 °F)Sliding velocity: vg = 0.6 … 200 m/s (2 … 656 ft/s)

MaterialsSeal face: Silicon carbide with DLC coatingSeat: Silicon carbide with DLC coatingSecondary seals: FKMMetal parts: 1.4006 or other stainless steelsAvailable also with EagleBurgmann DiamondFacetechnology. For more information see page 8.Other materials on request.

Certificates• NACE

Item Description1 Seal face, stationary2 Seat, rotating3 Thrust ring4 Spring5 Shaft sleeve and seat retainer7 Housing (size matched to installation space)9 Carbon ring separation seal CSR10 Labyrinth

A Seal gas supplyB Vent

D Separation gas supply

10 5 2 1 3

4 7 9

D s

1

A B D

DGS single seal with a CSR separation seal. This highly compactsealing system is typically used in geared compressors.


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PDGS

A well-established compressor seal for high pressure andboth low and high temperature applications. Innovativedesign features allow it to cope with even the highestpressures without problems. The application of U-cups andspecial dynamic sealing elements opens up a wide rangeof uses for this versatile and successful seal series.

Features• Gas-lubricated• Uni-directional or bi-directional• Elastomer-free

• Ready-to-fit cartridge unit• Single, double, tandem seal and tandem withintermediate labyrinth available

• Separation seals as labyrinths, radial clearance seals orCobaSeal are optionally available

Advantages• Wear-free and contact-free operation• Self-cleaning 3D gas grooves• High gas film stiffness• Secure cupped retainer for seat• Available in various materials for optimized chemicalresistance


Operating rangeShaft diameter: Ds3 = 29 … 355 mm (1.14" … 13.98")Pressure: p = 0 … 450 bar (0 … 6,525 PSI)

Temperature: t = -170 °C … +230 °C(-274 °F … +446 °F)Sliding velocity: vg = 0.6 … 200 m/s (2 … 656 ft/s)

MaterialsSeal face: Silicon carbide with DLC coatingSeat: Silicon carbide with DLC coatingSecondary seals: Polymer ringsMetal parts: 1.4006 or other stainless steelsAvailable also with EagleBurgmann DiamondFacetechnology. For more information see page 8.Other materials on request.


Item Description1 Seal face, stationary2 Seat, rotating3 Thrust ring4 Spring5 Shaft sleeve and seat retainer6 Intermediate sleeve7 Housing (size matched to installation space)9 Carbon ring separation seal (CSR)10 Labyrinth11 Intermediate labyrinth

A Primary seal gas supplyB Primary ventC Secondary seal gas supplyS Secondary ventD Separation gas supply

D S 3

A B C S D

5 2 3 2 4

3 91 7 16 8

1110

PDGS tandem seal with intermediate labyrinth and CSR separation seal for ultra-high pressureapplications. This type is used, for example, in compressors for gas reinjection in offshoreapplications.


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MDGS

EagleBurgmann MDGS are rugged seals for screwcompressors. They have a rotating ring made from ductilematerial with a high-performance coating. Rotating ringsare “in-situ shrouded”, making them practicallyindestructible. The coating offers excellent wear resistancein the low speed range (e.g. coast-down operation) inwhich contact between the seal faces is unavoidable.

The stationary, spring-mounted system is optionallyavailable as a sub-cartridge in combination with a rotatingseat made from ductile material. A secondary sealingfunction using O-rings allows it to be applied as

a component seal.

Features• Gas-lubricated• Bi-directional• Compact, radial design• Ready-to-fit cartridge unit, also available asa component seal

• Single, double, tandem seal and tandem withintermediate labyrinth available

Advantages• Wear-free and contact-free operation• Self-cleaning 3D gas grooves• High gas film stiffness• Fits into small spaces(e.g. process gas screw compressors)

• Available in various materials for optimized chemicalresistance


Operating rangeShaft diameter: d1 = 48 … 200 mm (1.89" … 7.87")

Pressure: p = 0 … 50 bar (0 … 725 PSI)Temperature: t = -20 °C … +200 °C (-4 °F … +392 °F)Sliding velocity: vg = 0.6 … 200 m/s (2 … 656 ft/s)

MaterialsSeal face: Carbon graphiteSeat: Ductile stainless steel with DM-TiN coatingSecondary seals: FKMMetal parts: 1.4006 or other stainless steels


Item Description1 Seal face, stationary2 Seat, rotating3 Thrust ring4 Spring5 Adapter6 Shaft sleeve7, 8 Housing9 Carbon ring separation seal (CSE)10 Labyrinth

A Primary seal gas supply

B Primary ventC Secondary gas supplyS Secondary ventD Separation gas supply

A B C S D

7

2 3 10 2 4

93186541

d 1

MDGS design example: Tandem seal with intermediate labyrinth. A typical solution used incombustible, toxic and environmentally harmful gases. The separation seal is an EagleBurgmanntype CSE non-contacting carbon segment seal.


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WRS

The WRS is an oil-lubricatedseal that safely sealsvarious types of compressors and organic media. With itsrugged design, low life-cycle costs and long service life, theWRS can be found in thousands of applications. The designis optimized by using the finite element method andcomputational fluid dynamics.

Features• Oil-lubricated• Bi-directional• Externally pressurized

• Ready-to-fit cartridge unit• Single, face bushing and double seal available• Suitable for high speeds• Hydrodynamic grooves for increased operatingcapabilities and stabilized low leakage

Advantages• Low oil consumption• Rugged seat with bandage ensures reliable operation• Wear-free operation by use of lift-off-design• Does not open if oil pressure drops

Operating rangeShaft diameter: 30 … 300 mm (1.18" … 11.81")Pressure: p = … 50 bar (725 PSI)Gas temperature: t = -20 °C … +200 °C (-4 °F … +392 °F)Sliding velocity: vg = 90 m/s (295 ft/s)Oil viscosity: ISO VG up to 68

MaterialsSeal face: Silicon carbide / CarbonSeat: Silicon carbideSecondary seals: FKMMetal parts: 1.4006 or other stainless steels

Item Description1 Seat, rotating2 Seal face, stationary3 Face housing6 Spring7 Shaft sleeve13 Housing

A Oil INB Oil OUT

3 2 1 2 3

13 6 7 6

B

A

WRS double seal for use in refrigeration compressors and expansion turbines.


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EBU800

Oil-lubricated seal for screw compressors. This specialshaft seal is characterized by its straightforward structure,compact length and quiet running even under changingpressure conditions. It also seals reliably at both high andlow temperatures.

Features• Double seal• Balanced• Bi-directional• Stationary bellows (process side)

• Multiple springs (bearing side)• Shrink-fit seat• Double-pressure balanced

Advantages• Suitable for high sliding velocities• Seal does not open if oil pressure drops• Rugged seat with bandage ensures reliable operation• Compact design with few sealing components

Operating rangeShaft diameter: d = … 220 mm (8.66")Pressure: (p2-p1) = … 5 bar (73 PSI)Sliding velocity: vg = 90 m/s (295 ft/s)

Materials

Bellows: AM350, Inconel®

718, Hastelloy®

-CSeal face: Special SiC, high-density carbon graphiteSeat: Silicon carbideSecondary seals: FKM (bearing side)Metal parts: 1.4301, Carpenter® 42, Inconel® 718,Hastelloy®-C

Item Description1.1 Seat1.2, 2.3, 3.2 Retainer2.2, 3.1 Seal face2.4 Bellows2.5 Adapter4 O-ring5 Spring2.6, 6 Housing2.7 Damper7 Retaining ring8 Sleeve

9 Spacer

A Oil INB Oil OUTC Drain

2.6 2.7 2.2 1.2 1.1

A

C B

3.1 3.2 4

2.5 2.4 2.3 9 8 7 5 6

EBU800 double seal as used in dry screw compressors.


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CSE

The service-proven bearing oil seal with low gasconsumption. Non contact type carbon rings are segmentedrings held together by a garter spring at the outer diameter.A defined minimum radial gap ensures contact-freeoperation. Robust design and reliable operation providesecure oil sealing even under extreme conditions.

Features• Non-contact type separation seal• Gas-lubricated• Bi-directional

• Ready-to-fit cartridge unit• Equipped with Espey type WKA400 carbon rings

Advantages• Low leakage• Slow roll capability• Insensitive to dry nitrogen

Operating rangeShaft diameter: 38 … 390 mm (1.50" … 15.35")Design pressure: p = … 10 bar (145 PSI)Operating pressure: p = 0.1 … 0.2 bar (1.45 … 2.90 PSI)Temperature: t = -20 °C … +120 °C (-4 °F … +248 °F)Sliding velocity: vg = 0 … 200 m/s (656 ft/s)Dew point: No limitation

Project-specific special designs possible

MaterialsSeal face: Carbon graphite impregnatedSecondary seals: FKMShaft sleeve: Stainless steel TC-coatedMetal parts: 1.4006 or other stainless steels


Item Description1 Shaft sleeve2 Segmented carbon ring3 Garter spring4 Housing for standardized sub-cartridge5 Housing (size adapted to the installation space)

D Separation gas

D

5

3

2 1

4


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CobaSeal

Since it was launched on the market, this innovative sealingsolution has proven its worth worldwide in both first fit andretrofit applications. It consists of a rotating seat made ofductile material and a stationary, spring-loaded seal face.The separation gas is routed through axial holes in thestationary seal ring into the middle of the sliding face. It isthen divided in the sealing gap into two leakage flowswhich are routed to the inner and outer diameters of theseal face.

Features• Gas-lubricated

• Bi-directional• Ready-to-fit cartridge unit• Self-cleaning 3D gas grooves• Aerostatic and aerodynamic lift-off

Advantages• Extremely low leakage• Double arranged (coaxial) dry gas seal with just one pairof seal faces

• Insensitive to oil contamination due to its special design• Wear-free, non-contacting operation in all conditions• Insensitive to radial vibrations due to axial sealing gap• Slow-roll or turning operation capable (static lift-off)• No limits regarding dew point of separation gas(silicon carbide instead of carbon)

• Lower N2 consumption than any other system• N2 can be switched off during standstill – the gap will

close and still provide the best oil sealing performance.• Best in class oil sealing by extremely small sealing gapand sling effect of rotating ring


Operating rangeShaft diameter: 29.5 … 210 mm (1.16" … 8.27")Pressure (vent): p = 0 … 15 bar (0 … 218 PSI)Operating pressure: p = 2.7 bar (39.16 PSI)Temperature: t = -20 °C … +150 °C (-4 °F … +302 °F)Sliding velocity: vg = 0 … 150 m/s (0 … 492 ft/s)Dew point: No limitation

MaterialsSeal face: Silicon carbide*Seat: ductile stainless steel*Secondary seals: FKM

Metal parts: 1.4006* With special EagleBurgmann high performance iDLC(in situ diamond-like carbon) coating

Item Description1 Seal face, stationary2 Seat, rotating3 Thrust ring4 Spring5 Shaft sleeve and seat

retainer6 Housing (size adapted to the

installation space)

D Separation gas

Single DGS + CobaSeal = Tandem seal

The CobaSeal is not just an excellent separation seal. It can also be used as a trueback-up seal for greater safety. A DGS-CobaSeal tandem arrangement can be operated atsealing pressures up to 20 bar (290 PSI). It does not need an intermediate labyrinth with

N2 supply and existing single seals can be simply retrofitted, thus benefitting fromincreased operational safety. The single DGS + CobaSeal combination is also shorter thanconventional tandem seals with separation seal and costs can be saved on the gas supplysystem in low pressure applications.

A B D

8 5 2 6 3 11 9 10

1 4 7 14 1 2 1 3

Item Description1, 9 Seal face, stationary2, 10 Seat, rotating3, 11 Thrust ring4, 12 Spring

5, 13 Shaft sleeve6 Adapter sleeve7, 14 Housing8 Labyrinth

3 1 2

6 4 5

D


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EagleBurgmann gas supply systems aredesigned for the operating conditions of thecompressor. Emphasis is placed on optimallyfulfilling the requirement of the gas seal,which eliminates the possible damage riskssuch as a build-up of moisture in the gas. Thisallows the seals to operate safely andcontinuously, simultaneously increasing thecompressor availability.

Additional modules, a complete gasconditioning skid and the EagleBurgmannRoTechBooster can be combined to preventcritical operating conditions for the seal, suchas when the compressor is stopped.

SMS – seal management systems andgas conditioning skidsRoTechBooster – continuous gas supplyand pressurization

21

EagleBurgmann

gas supply systems


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SMS

Primary seal gas line or buffer gas line• Supplying with filtered and dry flushing gas• Monitoring and regulating the flow rate and/or the(differential) pressure

• Monitoring the gas filter• For double seals, process gas is generally injected infront of the seal as a gas buffer. The actual seal issupplied with nitrogen.

Secondary seal gas line• Supplying with filtered Nitrogen• Monitoring and regulating the flow rate and/or the

(differential) pressure• Monitoring the gas filter

(Primary) vent line• Monitoring of the leakage from the seal and outputtingan alarm when the expected leakage is exceeded

• Ensuring that the leakage is dissipated to a flare or flaresystem

Separation gas line• Supplying and monitoring the separation seal withnitrogen or air

• Monitoring and regulating the flow rate and/or the(differential) pressure

Advantages• Reliable operation by supplying the seal with filtered andry flushing gas, barrier gas and separation gas

• Condition of the filters, control valves, instrumentationand nitrogen and flushing gas sources are checked at alltimes

• Constant monitoring for leakage and seal function.• Individually adaptable to suit operating conditions andsafety requirements

• All current industrial standards, such as API and specialoperator requirements, can be fulfilled

• Gas supply system (SMS) available with additional gas

conditioning skid

LIT TSHHPDITFILTER FILTER

TE

PIT

32

7

4 5 6

1

LIC

LCV

TE

TE

TIC

HEATER

RoTechBooster

Gas conditioning skid

1 Gas IN2 Cooler3 Separator4 Filter unit5 Heating6 RoTechBooster

7 Gas OUT - toprimary seal gassupply

The EagleBurgmann SMS is a customizable system basedon four modules. It is used to continuously supply andmonitor Dry Gas Seals.

Description of functions(Example: supplying a tandem DGS, see scheme on page 6)To avoid contamination of the seal, gas is generally takenfrom a higher compression stage, conditioned, filtered andoutput as clean flushing gas to the gas seal on the processside. Any leakage via the first gas seal stage is dissipatedto the flare. To prevent bearing oil contaminating of the gasseal, there is a separation seal in the form of a nitrogen orair barrier (separation gas) between the bearing and thegas seal.


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RoTechBooster

The RoTechBooster ensures a reliable and consistent flowof gas, even during fluctuating operating conditions. Gasseals can thus be reliably supplied with clean and dry gasin any situation. No rubbing shafts or seals and no slidingparts means fewer parts to maintain. Centrifugal solutionsare known to be very reliable and eliminate pulsation in thegas flow.

Features• Centrifugal design – high reliability and availability• High efficiency magnetic coupling: Eddy currents

reduced by 95 %, lower power consumption, reducedheat generation.• Simple set up, virtually maintenance-free• No oils required for lubrication• ATEX certification available on request• Available in different sizes, depending on requirements.• Easy to operate

Advantages• No limits on operating times• Service life 3-4 times longer than the previouslyavailable solutions.

• Totally gas tight without leakage to the atmosphere,increasing safety for the environment and personnelas a result.

Operating rangePressure: p = 0 … 360 bar (5,221 PSI)Temperature: t = -40 °C … +200 °C (-40 °F … +392 °F)Motor size: 5.5 kW … 15 kWDiameter: 355 mm … 560 mm (14" … 22")Higher pressure or temperature versions on request.

Item Description1.1 Inner rotor1.2 Outer rotor1.3 Can2 Motor3 Bearing cartridge4 Impeller5 Pressure housing

EagleBurgmann gas conditioning skid with integrated RoTechBooster.

1.2

1.1

1.3

l

2

34

5


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Best practice:Successful sealing solutions for our customers.

The Sulzer ethane pipeline pumps in the EnterprisePipeline in the USA have been equipped withEagleBurgmann typeDF-DGS6/98-ZT1-U gas sealswith DiamondFace coating since July 2011. Muchlonger operating periods can be achieved with thesecompared to the liquid-lubricated seals originallyused. Design conditions: p = 50 barg (725 PSIG),t = -30 °C … +200 °C (-22 °F … +392 °F),n = 3,600 min-1.

For Petrochina, EagleBurgmann has supplied severaPDGS10/210-ZT5-U gas seals with DiamondFace

coating. These are installed in Siemens centrifugalcompressors. The extremely hard and wear-resistantcoating provides optimal protection under operatingconditions in which the sliding faces come intocontact. Design conditions: p = 160 barg(2,320 PSIG), t = -50 °C … +230 °C(-58 °F … +446 °F), n = 4,782 min-1.

The Al-Shaheen oil platform operated by Maersk Oiin the Middle East has been successfully usingCobaSeal separation seals since 2012. TheEagleBurgmannCBS10/140-E2-U are installed inSiemens centrifugal compressors. Design conditionsp = 13 barg (189 PSIG), t = -20 °C … +40 °C(-4 °F … +104 °F), n = 13,619 min-1.

The largest gas seal to date - an EagleBurgmannPDGS10/390-ZT4-L with a shaft diameter of

350 mm (13.78") - has been in use in the WuhanIron & Steel works in China since 2009. It is installedin a Nuovo Pignone centrifugal compressor.The seal performs in the -50 °C … +250 °C(-58 °F … +482 °F) temperature range.Design conditions: p = 50 barg (725 PSIG),n = 3,000 min-1.

EagleBurgmann supplied Petrobras withPDGS50/135-ZT1-L/R seals for gas injection in

the Lula oilfield in Brazil. They are designed for highpressures up to 428 barg (6,206 PSIG) and reliablyseal Nuovo Pignone centrifugal compressors.Design conditions: t = -50 °C … +230 °C(-58 °F … +446 °F), n = 13,844 min-1.

There are severalPDGS10/200-ZT9-L/R gas sealsintegrated into centrifugal compressors fromShenyang Blowers in the West-East gas pipeline II(WEPP) that runs right across the whole of China.The pipeline is operated by Petrochina. Designconditions: p = 120 barg (1,740 PSIG),t = -50 °C … + 230 °C (-58 °F … +446 °F),n = 5,250 min-1.


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An EagleBurgmannPDGS designed for extremely lowtemperatures was installed in close collaboration withAtlas Copco in a compressor on the LNG carrier“Jamal”. Design conditions: p = 50 barg (725 PSIG),t = -170 °C … +150 °C (-274 °F … +302 °F),n = 23,000 min-1.

There is an EagleBurgmannPDGS10/78-E3-U inoperation in a Cryostar compander at Qatar Gas inQatar. This is specially designed for low temperatureapplications. Design conditions: p = 52 barg(754 PSIG), t = -196 °C … +230 °C(-321 °F … +446 °F), n = 22,100 min-1.

EagleBurgmann type 225H-120 and225L-120RoTechBoosters with 11 and 15 kW motors havebeen in use at pressures up to 120 bar (1,740 PSI)in the compressor stations of the 3,800 km long US/Canadian Alliance pipeline since July 2012. They

replaced the previously used piston boosters, whichcaused maintenance problems and downtimes.Everything has been running without problems sincethe change.

EagleBurgmann high pressure PDGS6/140-ZT1-L/R seals have been installed on the FPSO ships operated bPetrobras in the Lula oilfield off the Brazilian coast sin2011. The medium is natural gas with a high CO2 content. Design conditions: p = 335 barg (4,858 PSIGt = -50 °C … +230 °C (-58 °F … +446 °F),n = 12,076 min-1.

At Gasco Abu Dhabi, EagleBurgmannMDGS1/130-D1-U gas seals are used in screw compressors from

MAN Diesel & Turbo. The seal takes up very littlespace radially and is extremely wear-resistant due tothe ductile rotating seal ring with its high-performancoating. Design conditions: p = 15 barg (218 PSIG),t = -20 °C … +200 °C (-4 °F … +392 °F),n = 10,568 min-1.

EagleBurgmann PDGS5/145-ZT1-U gas seals arein use in RAG Austria’s natural gas storage facility in

Haidach, Austria. They reliably seal compressors fromMAN Diesel & Turbo which are used to compress andremove the gas. Design conditions: p = 250 barg(3,625 PSIG), t = -50 °C … +230 °C(-58 °F … +446 °F), n = 14,457 min-1.


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Worldwide and always available:EagleBurgmann TotalSealCare service for compressor seals.

A network of technology, competence and servicecenters dedicated to compressor seals covers allregions of the world. This allows us to respondquickly and efficiently to customer requirements.

• We have two technology centers operating at theglobal level in Germany (Eurasburg) and Japan(Niigata).

• There are five centers of competence inUSA (Houston), Brazil (Sao Paulo), UAE (Dubai)India (Pune) and China (Dalian), all of which areequipped with testing facilities for dynamic testruns.

• We have further service centers in Mexico (MexicoCity), South Africa (Edenvale) and Russia(Zavolzhe).

Dry Gas Seals production, Engineering Seal Management Systems production, Engineering Service Centers (testing, repairs) Compressor seals experts Sales support, Application engineering,

Product management, Engineering lead


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Our compressor seal services

Optimized services are major contributors to makingsure that plants run without interruption -and that doesn’t just start with maintenance. WithTotalSealCare, our modular service concept, we areable to cover all individual service requirements veryflexibly.

Our trained and experienced service engineers areable to perform all tasks, either in our many servicecenters around the world or on the customer’s own

premises. And naturally they have the appropriatequalifications (e.g. S2S certificate).

We offer everything that ensures the best service,broken down into individual modules and tailoredprograms. From full servicing of all installed seals, viastock management and right through to engineering,training and electronic documentation.

Advantages: reduced costs, increased plantavailability and greater reliability. And best of all, youonly choose the services that you actually need. Asthe services can be individually combined, withTotalSealCare, you can put together a servicepackage that totally meets your requirements andexpectations. Tailored to you and unique in itsflexibility and transparency. Some examples:

Consulting & engineering

E.g. advice on applications, inventory of all sealing systems in use,standardization concepts, seal upgrades, bad actor analysis and analysis ofcritical applications.

On-site service, upgrades and retrots

E.g. seal assembly/disassembly, inspection, maintenance, repair, replacement ofspare parts for seals and gas supply systems. Upgrade from oil-lubricated togas-lubricated sealing systems.

Technical analysis & support, troubleshooting

E.g. inspection and assessment of seals, systems and on-site situation.Allocation of a cross-functional team of experts for investigations,recommendations and detailed root cause analysis , including chemicalanalysis, plotting of dew point curves.

Service agreements

Agreements matched to customer requirements ensure that individual sealsor entire systems continue to operate without interruption. For example,a contract concluded with a French operator includes keeping a stock ofdifferent compressor seals for the customer’s multiple locations, rapiddelivery of replacement seals and repairs made within set times.


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Algeria · Angola ·Argentina ·Australia ·Austria · Bahrain · Bangladesh · Belarus ·Belgium · Botswana ·Brazil · Bulgaria · Cameroon ·Canada · Chile ·China ·ColombiaCongo · Cyprus ·Czech Republic ·Denmark ·Ecuador · Egypt · Estonia · Finland ·France · Gabon ·Germany · Ghana ·Great Britain · Greece ·Hungary ·India ·IndonesiaIraq · Ireland · Israel ·Italy · Ivory Coast ·Japan · Jordan · Kazakhstan · Kenya ·Korea · Kuwait · Latvia · Lebanon · Libya · Lithuania · Madagascar ·Malaysia · MauritiusMexico · Morocco · Myanmar · Namibia ·Netherlands ·New Zealand · Nigeria ·Norway · Oman · Pakis tan · Paraguay · Peru ·Philippines ·Poland · Qatar · RomaniaRussia ·Saudi Arabia· Serbia ·Singapore · Slovak Republic · Slovenia ·South Africa ·Spain · Sudan ·Sweden ·Switzerland ·Taiwan ·Thailand · Trinidad and Tobago

Tunisia ·Turkey · Ukraine ·United Arab Emirates · Uruguay ·USA · Venezuela · Vietnam · Yemen · Zambia · Zimbabwe ·www.eagleburgmann.com/world

[email protected]

EagleBurgmann is one of the internationally leading companies for industrial sealing technology. Ourproducts are used everywhere where safety and reliability are important: in the oil and gas industry,rening technology, the petrochemical, chemical and pharmaceutical industries, food processing, power,water, mining, pulp & paper, aerospace and many other spheres. Every day, more than 6,000 employeescontribute their ideas, solutions and commitment towards ensuring that customers all over the world canrely on our seals. Our modular TotalSealCare ser vice underlines our strong cus tomer orientation andoffers tailor-made services for every application.

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eagleburgmann k-kde e2 competence in compressor sealing 28.07.2015

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