- Email: [email protected]
Marine piston-ring technology set to reduce carbon emissions
NEWS
Editorial Office: Elsevier Ltd The Boulevard, Langford Lane Kidlington, Oxford OX5 1GB, UK Fax: Tel:+44 +44(0)1865 1865 843239 843973 Web: www.sealingtechnology.info Publisher: GregLaney Valero Executive Publisher: Priestley E-mail: [email protected] Editor: Simon Atkinson Editor: Simon Atkinson Tel/Fax: +44 (0) 1904 655944 Tel: +44 (0) 1904 655944 E-mail: [email protected] E-mail: [email protected] Production Support Manager: Lin Lucas Technical Editor: Bob Flitney E-mail: [email protected] Tel: +44 (0)1799 501659 E-mail: [email protected] Editorial advisory board: Production Support Lin Lucas Didier Fribourg (F) • Manager: Amrat Parmar (UK) E-mail: [email protected] Richard F Salant (USA) Wolfgang Schöpplein (D) • Shuzo Seya (J) Editorial advisory board: Scott Svendsen (USA) • Dr Brian S Ellis (UK) Yves Birembaut • Cyril X Latty (F) (F) Bob Flitney (UK)(F) Noël Brunetière Amrat Parmar (UK) • Richard F Salant (USA) Subscription Information Wolfgang Schöpplein (D) • Shuzo Seya (J) An annual subscription to Svendsen Sealing Technology Scott (USA) includes 12 issues and online access for up to 5 users. Subscription Information Prices: An annual Sealing Technology €1557 forsubscription all Europeantocountries & Iran includes 12 issues andfor online access forexcept up to 5Europe users. and Japan US$1744 all countries Prices: ¥206 700 for Japan €1215 for all run European & Iran Subscriptions for 12 countries months, from the date US$1362 isforreceived. all countries except Europe and Japan payment ¥161 400 for Japan More information: (Prices valid until 31 July-May 2016) http://store.elsevier.com/product.jsp?isbn=13504789 To subscribe send payment to the address above. Tel: +44 (0)1865 843687/Fax: +44 from (0)1865 834971 Permissions may be sought directly Elsevier Global Rights Email: [email protected], Department, PO Box 800, Oxford OX5 1DX, UK; phone: +44 1865 or via www.sealingtechnology.info. 843830, fax: +44 1865 853333, email: [email protected]. You Subscriptions for 12 months, the Elsevier’s date payment is may also contactrun Global Rights directlyfrom through home page received. (www.elsevier.com), selecting first ‘Support & contact’, then ‘Copyright & permission’. In the USA, users may clear permissions and make payments through Clearance Center, Inc., 222 Rosewood Permissions may the be Copyright sought directly from Elsevier Global Rights Drive, Danvers,POMABox 01923, phone: 978UK; 750 phone: 8400, fax: 978 Department, 800,USA; Oxford OX5+1 1DX, +44+11865 750 4744,fax: and+44 in the UK853333, throughemail: the Copyright Licensing Agency Rapid 843830, 1865 [email protected]. You Clearance Service Global (CLARCS), 90 directly Tottenham CourtElsevier’s Road, London W1P may also contact Rights through home page 0LP, UK; phone: +44 (0)20 7631first 5555; fax: +44 (0)20 7631 Other (www.elsevier.com), selecting ‘Support & contact’, then5500. ‘Copyright countries may have a local for payments. & permission’. In the USA,reprographic users may rights clear agency permissions and make Derivative Works the Copyright Clearance Center, Inc., 222 payments through Subscribers may reproduce tables of contents or prepare artiRosewood Drive, Danvers, MA 01923, USA; phone: +1 978lists 750of8400, cles including abstracts for in internal within their institutions. fax: +1 978 750 4744, and the UKcirculation through the Copyright Licensing Permission of the Publisher is required for resale or distribution Agency Rapid Clearance Service (CLARCS), 90 Tottenham Courtoutside Road, the institution. Permission of the is required for+44 all (0)20 other London W1P 0LP, UK; phone: +44 Publisher (0)20 7631 5555; fax: derivative works, including compilations translations. 7631 5500. Other countries may haveand a local reprographic rights Electronic Storage or Usage agency for payments. Permission the Publisher is required to store or use electronically DerivativeofWorks any materialmay contained in this journal, including articlelists or of partartiof Subscribers reproduce tables of contents or any prepare an Except as outlined above,circulation no part of this their publication may clesarticle. including abstracts for internal within institutions. be reproduced, stored in a retrieval system or transmitted in any form Permission of the Publisher is required for resale or distribution outside or any means, electronic,of mechanical, photocopying, recording or thebyinstitution. Permission the Publisher is required for all other otherwise, without prior written permission of the Publisher. Address derivative works, including compilations and translations. permissions requests to: Electronic Storage orElsevier Usage Science Global Rights Department, at the mail, faxofand addresses noted above. Permission theemail Publisher is required to store or use electronically Notice any material contained in this journal, including any article or part of No responsibility the Publisher and/ may an article. Exceptisasassumed outlinedbyabove, no partfor of any this injury publication or to persons a matter products liability, be damage reproduced, stored or in property a retrievalassystem or of transmitted in any form negligence or otherwise, or from any use orphotocopying, operation of any meth- or or by any means, electronic, mechanical, recording ods, products, instructions or ideaspermission contained of in the material otherwise, without prior written Publisher.herein. Address Because of rapid advan in the Science medicalGlobal sciences, in particular, inde-at permissions requests to:ces Elsevier Rights Department, pendent of diagnoses drug dosages should be made. the mail,verification fax and email addresses and noted above. Although Notice all advertising material is expected to conform to ethical (medical) standards, inclusionbyinthe thisPublisher publication not constitute a No responsibility is assumed for does any injury and/ guarantee of the quality or value of such product or damageor toendorsement persons or property as a matter of products liability, or of the claims of it by manufacturer. negligence ormade otherwise, or its from any use or operation of any methods, products, instructions or ideas contained in the material herein. Because of rapid advances in the medical sciences, in particular, independent verification of diagnoses and drug dosages should be made. Although all advertising material is expected to conform to ethical (medical) standards, inclusion in this publication does not constitute a guarantee or endorsement of the quality or value of such product or of the claims made of it by its manufacturer.
12980 Digitally Produced by 02129 Mayfield Press (Oxford) Ltd Digitally Produced by Mayfield Press (Oxford) Ltd
2
Sealing Technology
Elseal G makes aluminium production greener
E
lkem Carbon has recently launched Elseal G which, it says, will greatly reduce workers’ exposure to carcinogenic compounds during the industrial production of aluminium, and make the manufacturing process greener and safer. The aluminium production process involves temperatures of 950°C. To prevent liquid metal and corrosive electrolyte from damaging the cathode lining, it is necessary to use cathode stamp pastes to seal the gaps around cathodic carbon blocks during the production process. Traditional cathode stamp pastes all contain coal tar adhesive. Coal tar is classified as a hazardous substance because it contains carcinogenic polycyclic aromatic hydrocarbons (PAHs). Such substances, used during aluminium production, have the potential to damage the physical health of workers, cause air pollution and make waste treatment more difficult. The company says that Elseal G can be used as a substitute for cathode stamp pastes containing coal tar. It contains no hazardous substances and will not expose workers to potential dangerous chemicals during the operation – so the whole production process is greener, healthier and safer. Stian Madshus, Marketing and Sales Director, Elkem Carbon, says that so far all customer feedback on the performance of Elseal G has been positive and it has become a benchmark product for some customers. Hydro, a Norway-based aluminium producer, is one of them and it is one of the first companies to use the product in electrolysis bath relining in its smelters. Contact: Elkem Carbon, Fiskaaveien 100, NO-4675 Kristiansand, Norway. Tel: +47 3801 7000, Fax: +47 3801 7492, Web: www.elkem.com/carbon
Marine piston-ring technology set to reduce carbon emissions
F
ederal-Mogul Powertrain, a division of Federal-Mogul Holdings Corp, has developed a piston ring for twostroke diesel engines that reduces oil consumption and marine pollution by allowing the volumes of lubricant used to be greatly reduced.
The patented surface topography of the new eWAVE rings has been designed to distribute oil more evenly around the cylinder bores, enabling less oil to provide greater protection. ‘eWAVE is the first ring that disperses oil around the bore in a homogeneous layer, protecting against local oil-film breakdown, improving the sealing of combustion gases, reducing wear and ensuring more uniform liner temperatures,’ explained Richard Mittler, Senior Expert Manager, Analysis and Product Development, Technology, Rings & Liners, Federal-Mogul. ‘This means that the amount of oil injected into the cylinder can be greatly reduced and, because two-stroke engines expel their lubricant in the exhaust, less oil means lower carbon emissions as well as reduced operating costs.’ Conventional two-stroke piston rings are predominantly designed using principles very similar to those used in four-stroke engines, in which there is a flow of oil from the crankcase around the entire circumference of the ring. However, in two-stroke engines the lube oil is sprayed against the cylinder liner in proportion to the engine load. This feed oil is not uniformly distributed on the cylinder wall. To ensure a safe minimum coverage of all areas of the liner, surplus oil is injected in order to compensate for the uneven distribution. Because there is no mechanism to distribute the oil circumferentially around the bore, much of the surplus is pushed downwards in the direction of the ports. This means that approximately 30–40% of the oil supplied passes through to the exhaust without ever performing a useful function. The geometry of the eWAVE piston ring creates a circumferential pressure difference that generates controlled oil flow around the bore as the piston reciprocates – improving the uniformity of the oil film. It achieves this by varying, around the circumference, the point about which the ring pivots in its groove as the piston reverses direction. Tests have shown that the eWAVE ring distributes oil over an area about 10 times the size of that achieved by conventional ring profiles, which generate less than 1% of their oil flow in a circumferential direction, says Federal-Mogul. ‘Long-term trials since 2013 in a number of vessels with different oil injection technologies have confirmed the economic and environmental advantages of eWAVE rings,’ continued Mittler. ‘In over 8000 hours of testing we have seen improved wear resistance whilst reducing oil consumption by up to 20% – helping to reduce operating costs, whilst improving the marine environment.’ The detail of the eWAVE design can be optimised to suit individual types and arrangements
May 2016
NEWS/IN BRIEF of feed nozzle, and different engine strokes and operating speeds, says the company.
IN BRIEF
Contacts: Federal-Mogul Burscheid GmbH, Rings & Liners, Burgermeister-Schmidt-Str. 17, Burscheid, Germany, 51399. Tel: +49 2174 690 Federal-Mogul Corp, 27300 West 11 Mile Road, Southfield, MI 48034, USA. Tel: +1 248 354 7700, Web: www.federal-mogul.com
Elastomer-free compressor seal operates at high pressures
E
agleBurgmann Germany GmbH & Co Kg’s elastomer-free, gaslubricated mechanical PDGS compressor seal has been developed specifically for applications involving high pressures, and high and low temperatures. According to the company, high-quality components, such as polymer secondary sealing elements (U cups) and dynamic secondary seals of tungsten carbide make this a reliable universal seal for a broad range of applications in the oil and gas industry, on board liquefied natural gas floating production storage and offloading vessels, and in pipelines, refineries and petrochemicals facilities. When used at low temperatures, the specifically developed dynamic secondary seals exhibit an outstanding mobility, claims the firm. They satisfy all requirements such as automatic alignment, resistance to extrusion, and temperature and chemical resistance. These characteristics mean that the seal has a high level of operational safety. Technical features include: • non-wear and non-contact operation; • high rigidity of gas film; • the use of optimised aerodynamic 3D gas grooves with a self-cleaning effect; • optimal sliding properties in start/stop operation through the use of a DLC coating; • availability in different materials for optimal chemical resistance (and also available with the EagleBurgmann DiamondFace coating technology); • availability as single, double and tandem seal (and tandem seal with intermediate labyrinth); • ready-to-fit unit • oil-barrier seals such as labyrinth, radial gap seals or CobaSeal as option; and • impervious to explosive decompression.
EagleBurgmann’s elastomer-free PDGS compressor seal for high-pressure applications and extreme temperatures, with the aerodynamic CSR oil barrier seal.
Operating limits of the PDGS are summarised below. • shaft diameter dn: 29–355 mm (1.14–13.98 inches); • operating pressure p: 0–450 bar (6525 psi); • operating temperature t: -170°C to 230°C (-274°F to 446°F); and • sliding velocity vg: 0.6–200 m/s (2–656 ft/s). Contact: Ellen Klier, EagleBurgmann Germany GmbH & Co Kg, Äußere Sauerlacher Str. 6–10, 82515 Wolfratshausen, Germany. Tel: +49 8171 23 1453, Fax: +49 8171 23 1095, Email: [email protected], Web: www.eagleburgmann.com
3D-printing materials produce seals and gaskets
N
injaTek, a division of US-based Fenner Drives Inc and maker of the NinjaFlex and SemiFlex 3D printing filaments, has launched two new 3D printing materials that can be used to produce components such as seals and gaskets. Cheetah filament is a high-performance flexible polyurethane material that prints across all printer types using ABS settings. Key benefits are a faster print speed than other flexible products (up to 60 mm/second), excellent interlayer adhesion and limited retraction. Key uses include parts with a high level of detail, such as gaskets, grips, hinges, seals, sleeves or snap-fit parts. According to NinjaTek, this material enables parts such as these to be produced more quickly and with fewer poor prints, saving users time and money. NinjaTek’s Armadillo filament is a high-performance rigid material best described as “tough and rugged”. It possesses excellent durability under stress from external sources and is resistant to greases, oils and many other industrial chemicals, says the firm. Printability is a key benefit,
Momentive now trading on OTCQX MPM Holdings Inc, the parent company of Momentive Performance Materials Inc, which specialises in silicones and advanced materials, recently announced that the company’s stock has been approved to trade on the OTCQX Best Market. Investors can find current financial disclosures and Real-Time Level 2 quotes for Momentive by visiting the Web-site below and entering the symbol MPMQ. More information: Web: www.otcmarkets.com Collins named CFO, Dana Jonathan Collins has been named Senior Vice President and Chief Financial Officer (CFO), Dana Holding Corp – a US company that develops engineered driveline, sealing and thermal-management technologies. Collins joins the company after serving in the same role at ProQuest, a global leader in information resources, following previous experience in the automotive-supply industry. ChemPoint signs distribution agreement with Dow Corning In the USA, ChemPoint.com Inc, a subsidiary of Univar Inc, and a leader in the marketing, sales and distribution of speciality and fine chemicals, has signed a master distribution agreement with Dow Corning, which specialises in silicone-based technology. Under this agreement, ChemPoint will manage order placement, fulfilment and technical support for Dow Corning’s Molykote brand compounds, greases, pastes, anti-friction coatings, dispersions and oils for the industrial assembly and maintenance market in the USA and Canada. Hardide technical director speaks at surface engineering events Dr Yuri Zhuk, Technical Director, Hardide Plc, a UK-based coatings company, is to lecture at the Extreme Surface Engineering and Coatings course that is being held on 27–29 June 2016 at Cranfield University, Bedfordshire, UK. The three-day course will provide an understanding of the role that surfaces play in materials behaviour of thin film and coating systems. Dr Zhuk is also presenting a paper at the Manufacturing Association’s (MTA) conference 2nd UK Industrial Surface Engineering – Present & Future, which is being held at the university on 30 June 2016. More information: Web: www.cranfield.ac.uk/Courses/training/ Extreme-Surface-Engineering-and-Coatings Web: www.mta.org.uk/whats-new/events/ 2nd-uk-industrial-surface-engineering-present-future
3 May 2016
Sealing Technology
Editorial Office: Elsevier Ltd The Boulevard, Langford Lane Kidlington, Oxford OX5 1GB, UK Fax: Tel:+44 +44(0)1865 1865 843239 843973 Web: www.sealingtechnology.info Publisher: GregLaney Valero Executive Publisher: Priestley E-mail: [email protected] Editor: Simon Atkinson Editor: Simon Atkinson Tel/Fax: +44 (0) 1904 655944 Tel: +44 (0) 1904 655944 E-mail: [email protected] E-mail: [email protected] Production Support Manager: Lin Lucas Technical Editor: Bob Flitney E-mail: [email protected] Tel: +44 (0)1799 501659 E-mail: [email protected] Editorial advisory board: Production Support Lin Lucas Didier Fribourg (F) • Manager: Amrat Parmar (UK) E-mail: [email protected] Richard F Salant (USA) Wolfgang Schöpplein (D) • Shuzo Seya (J) Editorial advisory board: Scott Svendsen (USA) • Dr Brian S Ellis (UK) Yves Birembaut • Cyril X Latty (F) (F) Bob Flitney (UK)(F) Noël Brunetière Amrat Parmar (UK) • Richard F Salant (USA) Subscription Information Wolfgang Schöpplein (D) • Shuzo Seya (J) An annual subscription to Svendsen Sealing Technology Scott (USA) includes 12 issues and online access for up to 5 users. Subscription Information Prices: An annual Sealing Technology €1557 forsubscription all Europeantocountries & Iran includes 12 issues andfor online access forexcept up to 5Europe users. and Japan US$1744 all countries Prices: ¥206 700 for Japan €1215 for all run European & Iran Subscriptions for 12 countries months, from the date US$1362 isforreceived. all countries except Europe and Japan payment ¥161 400 for Japan More information: (Prices valid until 31 July-May 2016) http://store.elsevier.com/product.jsp?isbn=13504789 To subscribe send payment to the address above. Tel: +44 (0)1865 843687/Fax: +44 from (0)1865 834971 Permissions may be sought directly Elsevier Global Rights Email: [email protected], Department, PO Box 800, Oxford OX5 1DX, UK; phone: +44 1865 or via www.sealingtechnology.info. 843830, fax: +44 1865 853333, email: [email protected]. You Subscriptions for 12 months, the Elsevier’s date payment is may also contactrun Global Rights directlyfrom through home page received. (www.elsevier.com), selecting first ‘Support & contact’, then ‘Copyright & permission’. In the USA, users may clear permissions and make payments through Clearance Center, Inc., 222 Rosewood Permissions may the be Copyright sought directly from Elsevier Global Rights Drive, Danvers,POMABox 01923, phone: 978UK; 750 phone: 8400, fax: 978 Department, 800,USA; Oxford OX5+1 1DX, +44+11865 750 4744,fax: and+44 in the UK853333, throughemail: the Copyright Licensing Agency Rapid 843830, 1865 [email protected]. You Clearance Service Global (CLARCS), 90 directly Tottenham CourtElsevier’s Road, London W1P may also contact Rights through home page 0LP, UK; phone: +44 (0)20 7631first 5555; fax: +44 (0)20 7631 Other (www.elsevier.com), selecting ‘Support & contact’, then5500. ‘Copyright countries may have a local for payments. & permission’. In the USA,reprographic users may rights clear agency permissions and make Derivative Works the Copyright Clearance Center, Inc., 222 payments through Subscribers may reproduce tables of contents or prepare artiRosewood Drive, Danvers, MA 01923, USA; phone: +1 978lists 750of8400, cles including abstracts for in internal within their institutions. fax: +1 978 750 4744, and the UKcirculation through the Copyright Licensing Permission of the Publisher is required for resale or distribution Agency Rapid Clearance Service (CLARCS), 90 Tottenham Courtoutside Road, the institution. Permission of the is required for+44 all (0)20 other London W1P 0LP, UK; phone: +44 Publisher (0)20 7631 5555; fax: derivative works, including compilations translations. 7631 5500. Other countries may haveand a local reprographic rights Electronic Storage or Usage agency for payments. Permission the Publisher is required to store or use electronically DerivativeofWorks any materialmay contained in this journal, including articlelists or of partartiof Subscribers reproduce tables of contents or any prepare an Except as outlined above,circulation no part of this their publication may clesarticle. including abstracts for internal within institutions. be reproduced, stored in a retrieval system or transmitted in any form Permission of the Publisher is required for resale or distribution outside or any means, electronic,of mechanical, photocopying, recording or thebyinstitution. Permission the Publisher is required for all other otherwise, without prior written permission of the Publisher. Address derivative works, including compilations and translations. permissions requests to: Electronic Storage orElsevier Usage Science Global Rights Department, at the mail, faxofand addresses noted above. Permission theemail Publisher is required to store or use electronically Notice any material contained in this journal, including any article or part of No responsibility the Publisher and/ may an article. Exceptisasassumed outlinedbyabove, no partfor of any this injury publication or to persons a matter products liability, be damage reproduced, stored or in property a retrievalassystem or of transmitted in any form negligence or otherwise, or from any use orphotocopying, operation of any meth- or or by any means, electronic, mechanical, recording ods, products, instructions or ideaspermission contained of in the material otherwise, without prior written Publisher.herein. Address Because of rapid advan in the Science medicalGlobal sciences, in particular, inde-at permissions requests to:ces Elsevier Rights Department, pendent of diagnoses drug dosages should be made. the mail,verification fax and email addresses and noted above. Although Notice all advertising material is expected to conform to ethical (medical) standards, inclusionbyinthe thisPublisher publication not constitute a No responsibility is assumed for does any injury and/ guarantee of the quality or value of such product or damageor toendorsement persons or property as a matter of products liability, or of the claims of it by manufacturer. negligence ormade otherwise, or its from any use or operation of any methods, products, instructions or ideas contained in the material herein. Because of rapid advances in the medical sciences, in particular, independent verification of diagnoses and drug dosages should be made. Although all advertising material is expected to conform to ethical (medical) standards, inclusion in this publication does not constitute a guarantee or endorsement of the quality or value of such product or of the claims made of it by its manufacturer.
12980 Digitally Produced by 02129 Mayfield Press (Oxford) Ltd Digitally Produced by Mayfield Press (Oxford) Ltd
2
Sealing Technology
Elseal G makes aluminium production greener
E
lkem Carbon has recently launched Elseal G which, it says, will greatly reduce workers’ exposure to carcinogenic compounds during the industrial production of aluminium, and make the manufacturing process greener and safer. The aluminium production process involves temperatures of 950°C. To prevent liquid metal and corrosive electrolyte from damaging the cathode lining, it is necessary to use cathode stamp pastes to seal the gaps around cathodic carbon blocks during the production process. Traditional cathode stamp pastes all contain coal tar adhesive. Coal tar is classified as a hazardous substance because it contains carcinogenic polycyclic aromatic hydrocarbons (PAHs). Such substances, used during aluminium production, have the potential to damage the physical health of workers, cause air pollution and make waste treatment more difficult. The company says that Elseal G can be used as a substitute for cathode stamp pastes containing coal tar. It contains no hazardous substances and will not expose workers to potential dangerous chemicals during the operation – so the whole production process is greener, healthier and safer. Stian Madshus, Marketing and Sales Director, Elkem Carbon, says that so far all customer feedback on the performance of Elseal G has been positive and it has become a benchmark product for some customers. Hydro, a Norway-based aluminium producer, is one of them and it is one of the first companies to use the product in electrolysis bath relining in its smelters. Contact: Elkem Carbon, Fiskaaveien 100, NO-4675 Kristiansand, Norway. Tel: +47 3801 7000, Fax: +47 3801 7492, Web: www.elkem.com/carbon
Marine piston-ring technology set to reduce carbon emissions
F
ederal-Mogul Powertrain, a division of Federal-Mogul Holdings Corp, has developed a piston ring for twostroke diesel engines that reduces oil consumption and marine pollution by allowing the volumes of lubricant used to be greatly reduced.
The patented surface topography of the new eWAVE rings has been designed to distribute oil more evenly around the cylinder bores, enabling less oil to provide greater protection. ‘eWAVE is the first ring that disperses oil around the bore in a homogeneous layer, protecting against local oil-film breakdown, improving the sealing of combustion gases, reducing wear and ensuring more uniform liner temperatures,’ explained Richard Mittler, Senior Expert Manager, Analysis and Product Development, Technology, Rings & Liners, Federal-Mogul. ‘This means that the amount of oil injected into the cylinder can be greatly reduced and, because two-stroke engines expel their lubricant in the exhaust, less oil means lower carbon emissions as well as reduced operating costs.’ Conventional two-stroke piston rings are predominantly designed using principles very similar to those used in four-stroke engines, in which there is a flow of oil from the crankcase around the entire circumference of the ring. However, in two-stroke engines the lube oil is sprayed against the cylinder liner in proportion to the engine load. This feed oil is not uniformly distributed on the cylinder wall. To ensure a safe minimum coverage of all areas of the liner, surplus oil is injected in order to compensate for the uneven distribution. Because there is no mechanism to distribute the oil circumferentially around the bore, much of the surplus is pushed downwards in the direction of the ports. This means that approximately 30–40% of the oil supplied passes through to the exhaust without ever performing a useful function. The geometry of the eWAVE piston ring creates a circumferential pressure difference that generates controlled oil flow around the bore as the piston reciprocates – improving the uniformity of the oil film. It achieves this by varying, around the circumference, the point about which the ring pivots in its groove as the piston reverses direction. Tests have shown that the eWAVE ring distributes oil over an area about 10 times the size of that achieved by conventional ring profiles, which generate less than 1% of their oil flow in a circumferential direction, says Federal-Mogul. ‘Long-term trials since 2013 in a number of vessels with different oil injection technologies have confirmed the economic and environmental advantages of eWAVE rings,’ continued Mittler. ‘In over 8000 hours of testing we have seen improved wear resistance whilst reducing oil consumption by up to 20% – helping to reduce operating costs, whilst improving the marine environment.’ The detail of the eWAVE design can be optimised to suit individual types and arrangements
May 2016
NEWS/IN BRIEF of feed nozzle, and different engine strokes and operating speeds, says the company.
IN BRIEF
Contacts: Federal-Mogul Burscheid GmbH, Rings & Liners, Burgermeister-Schmidt-Str. 17, Burscheid, Germany, 51399. Tel: +49 2174 690 Federal-Mogul Corp, 27300 West 11 Mile Road, Southfield, MI 48034, USA. Tel: +1 248 354 7700, Web: www.federal-mogul.com
Elastomer-free compressor seal operates at high pressures
E
agleBurgmann Germany GmbH & Co Kg’s elastomer-free, gaslubricated mechanical PDGS compressor seal has been developed specifically for applications involving high pressures, and high and low temperatures. According to the company, high-quality components, such as polymer secondary sealing elements (U cups) and dynamic secondary seals of tungsten carbide make this a reliable universal seal for a broad range of applications in the oil and gas industry, on board liquefied natural gas floating production storage and offloading vessels, and in pipelines, refineries and petrochemicals facilities. When used at low temperatures, the specifically developed dynamic secondary seals exhibit an outstanding mobility, claims the firm. They satisfy all requirements such as automatic alignment, resistance to extrusion, and temperature and chemical resistance. These characteristics mean that the seal has a high level of operational safety. Technical features include: • non-wear and non-contact operation; • high rigidity of gas film; • the use of optimised aerodynamic 3D gas grooves with a self-cleaning effect; • optimal sliding properties in start/stop operation through the use of a DLC coating; • availability in different materials for optimal chemical resistance (and also available with the EagleBurgmann DiamondFace coating technology); • availability as single, double and tandem seal (and tandem seal with intermediate labyrinth); • ready-to-fit unit • oil-barrier seals such as labyrinth, radial gap seals or CobaSeal as option; and • impervious to explosive decompression.
EagleBurgmann’s elastomer-free PDGS compressor seal for high-pressure applications and extreme temperatures, with the aerodynamic CSR oil barrier seal.
Operating limits of the PDGS are summarised below. • shaft diameter dn: 29–355 mm (1.14–13.98 inches); • operating pressure p: 0–450 bar (6525 psi); • operating temperature t: -170°C to 230°C (-274°F to 446°F); and • sliding velocity vg: 0.6–200 m/s (2–656 ft/s). Contact: Ellen Klier, EagleBurgmann Germany GmbH & Co Kg, Äußere Sauerlacher Str. 6–10, 82515 Wolfratshausen, Germany. Tel: +49 8171 23 1453, Fax: +49 8171 23 1095, Email: [email protected], Web: www.eagleburgmann.com
3D-printing materials produce seals and gaskets
N
injaTek, a division of US-based Fenner Drives Inc and maker of the NinjaFlex and SemiFlex 3D printing filaments, has launched two new 3D printing materials that can be used to produce components such as seals and gaskets. Cheetah filament is a high-performance flexible polyurethane material that prints across all printer types using ABS settings. Key benefits are a faster print speed than other flexible products (up to 60 mm/second), excellent interlayer adhesion and limited retraction. Key uses include parts with a high level of detail, such as gaskets, grips, hinges, seals, sleeves or snap-fit parts. According to NinjaTek, this material enables parts such as these to be produced more quickly and with fewer poor prints, saving users time and money. NinjaTek’s Armadillo filament is a high-performance rigid material best described as “tough and rugged”. It possesses excellent durability under stress from external sources and is resistant to greases, oils and many other industrial chemicals, says the firm. Printability is a key benefit,
Momentive now trading on OTCQX MPM Holdings Inc, the parent company of Momentive Performance Materials Inc, which specialises in silicones and advanced materials, recently announced that the company’s stock has been approved to trade on the OTCQX Best Market. Investors can find current financial disclosures and Real-Time Level 2 quotes for Momentive by visiting the Web-site below and entering the symbol MPMQ. More information: Web: www.otcmarkets.com Collins named CFO, Dana Jonathan Collins has been named Senior Vice President and Chief Financial Officer (CFO), Dana Holding Corp – a US company that develops engineered driveline, sealing and thermal-management technologies. Collins joins the company after serving in the same role at ProQuest, a global leader in information resources, following previous experience in the automotive-supply industry. ChemPoint signs distribution agreement with Dow Corning In the USA, ChemPoint.com Inc, a subsidiary of Univar Inc, and a leader in the marketing, sales and distribution of speciality and fine chemicals, has signed a master distribution agreement with Dow Corning, which specialises in silicone-based technology. Under this agreement, ChemPoint will manage order placement, fulfilment and technical support for Dow Corning’s Molykote brand compounds, greases, pastes, anti-friction coatings, dispersions and oils for the industrial assembly and maintenance market in the USA and Canada. Hardide technical director speaks at surface engineering events Dr Yuri Zhuk, Technical Director, Hardide Plc, a UK-based coatings company, is to lecture at the Extreme Surface Engineering and Coatings course that is being held on 27–29 June 2016 at Cranfield University, Bedfordshire, UK. The three-day course will provide an understanding of the role that surfaces play in materials behaviour of thin film and coating systems. Dr Zhuk is also presenting a paper at the Manufacturing Association’s (MTA) conference 2nd UK Industrial Surface Engineering – Present & Future, which is being held at the university on 30 June 2016. More information: Web: www.cranfield.ac.uk/Courses/training/ Extreme-Surface-Engineering-and-Coatings Web: www.mta.org.uk/whats-new/events/ 2nd-uk-industrial-surface-engineering-present-future
3 May 2016
Sealing Technology