- Email: [email protected]
Mechanical seal primary rings seal low-viscosity liquids
NEWS
Editorial Office: Elsevier Ltd The Boulevard, Langford Lane Kidlington, Oxford OX5 1GB, UK Fax: +44 (0)1865 843973 Web: www.sealingtechnology.info Publisher: GregHopwood Valero Publisher: David 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] Technical Editor: Bob Flitney Technical Flitney Tel: +44 Editor: (0)1588Bob 661056 +44 (0)1799 501659 E-mail:Tel: [email protected] E-mail: [email protected] Production Support Manager: Lin Lucas Production Manager: Lin Lucas E-mail:Support [email protected] E-mail: [email protected] Editorial advisory board: Editorial advisory board: $IDIER &RIBOURG & s #YRIL 8 ,ATTY & 9VES "IREMBAUT & s #YRIL 8 ,ATTY & !MRAT 0ARMAR 5+ s 2ICHARD & 3ALANT 53! !MRAT 0ARMAR 5+ s 2ICHARD & 3ALANT 53! 7OLFGANG 3CHÚPPLEIN $ s 3HUZO 3EYA * 7OLFGANG 3CHÚPPLEIN $ s 3HUZO 3EYA * 3COTT 3VENDSEN 53! s $R "RIAN 3 %LLIS 5+ Scott Svendsen (USA) Subscription Information Subscription Information An annual subscription to Sealing Technology includes 12 An annual issues and subscription online accesstoforSealing up to Technology 5 users. includes 12 issues and online access for up to 5 users. Prices: Prices:for all European countries & Iran 1334 1215 forfor allall European & Iran and Japan US$1495 countriescountries except Europe US$1362 countries except Europe and Japan ¥177 200 for for all Japan ¥161 400 foruntil Japan (Prices valid 31 December 2013) (Prices valid until Octoberto2013) To subscribe send 31 payment the address above. To subscribe send payment to the address above. Tel: +44 (0)1865 843687 Tel: +44 (0)1865 843687/Fax: +44 or via www.sealingtechnology.info (0)1865 834971 Email: [email protected], Subscriptions run for 12 months, from the date payment is or via www.sealingtechnology.info. received. Subscriptions run for 12 months, from the date payment is received. Permissions may be sought directly from Elsevier Global Rights Department, PO Box 800, Oxford OX5 1DX, UK; phone: +44 1865 Permissions be sought from Elsevier Global Rights 843830, fax: may +44 1865 853333,directly email: [email protected]. You Department, PO Box 800, Oxford OX5 through 1DX, UK; phone: home +44 1865 may also contact Global Rights directly Elsevier’s page 843830, fax: +44 1865 853333, [email protected]. You (www.elsevier.com), selecting firstemail: ‘Support & contact’, then ‘Copyright may also contact Rights directly Elsevier’s home page & permission’. In Global the USA, users may through clear permissions and make (www.elsevier.com), first ‘Support Center, & contact’, payments through theselecting Copyright Clearance Inc.,then 222 ‘Copyright Rosewood & permission’. In the USA,USA; users may +1 clear and+1make Drive, Danvers, MA 01923, phone: 978permissions 750 8400, fax: 978 payments through thethrough Copyright Clearance Center, Inc.,Rapid 222 750 4744, and in the UK the Copyright Licensing Agency Rosewood Service Drive, Danvers, MA9001923, USA; phone: +1 978 750 8400, Clearance (CLARCS), Tottenham Court Road, London W1P fax: +1 750+44 4744, and7631 in the UK through Copyright Licensing 0LP, UK;978 phone: (0)20 5555; fax: +44the (0)20 7631 5500. Other Agency Rapid Service (CLARCS), 90 Tottenham Court Road, countries may Clearance have a local reprographic rights agency for payments. London W1PWorks 0LP, UK; phone: +44 (0)20 7631 5555; fax: +44 (0)20 Derivative 7631 5500.may Other countries mayofhave a local reprographic Subscribers reproduce tables contents or prepare lists ofrights artiagency for payments. cles including abstracts for internal circulation within their institutions. DerivativeofWorks Permission the Publisher is required for resale or distribution outside Subscribers mayPermission reproduce of tables contentsisorrequired preparefor listsallofother artithe institution. the of Publisher cles including abstracts for compilations internal circulation within their institutions. derivative works, including and translations. Permission ofStorage the Publisher is required for resale or distribution outside Electronic or Usage the institution. Permission Publisher is required for all other Permission of the Publisherofis the required to store or use electronically derivative works, including compilations and translations. any material contained in this journal, including any article or part of Electronic Storage or Usage an article. Except as outlined above, no part of this publication may Permission of the Publisher is required to or store or use electronically be reproduced, stored in a retrieval system transmitted in any form anybymaterial contained in thismechanical, journal, including any article or part or of or any means, electronic, photocopying, recording an article. Except outlined above, no partofofthe thisPublisher. publication may otherwise, withoutasprior written permission Address be reproduced, storedto: in Elsevier a retrieval system or transmitted in any form permissions requests Science Global Rights Department, at or by anyfax means, electronic, mechanical, photocopying, recording or the mail, and email addresses noted above. otherwise, without prior written permission of the Publisher. Address Notice permissions requests to: Elsevier Science Global Department, at No responsibility is assumed by the Publisher forRights any injury and/ thedamage mail, faxtoand emailoraddresses above.of products liability, or persons property noted as a matter Notice negligence or otherwise, or from any use or operation of any methNo responsibility is assumed thecontained Publisher in forthe anymaterial injury and/ ods, products, instructions or by ideas herein. or damage persons as a matter of products liability, Because of to rapid advanorcesproperty in the medical sciences, in particular, indenegligence or otherwise, or from any or dosages operation of anybemethpendent verification of diagnoses anduse drug should made. ods, products, instructionsmaterial or ideasis contained in conform the material herein. Although all advertising expected to to ethical Because ofstandards, rapid advan ces in the medical sciences, in particular, inde-a (medical) inclusion in this publication does not constitute pendent verification of diagnoses and drug be made. guarantee or endorsement of the quality or dosages value of should such product or Although all advertising material is expected to conform to ethical of the claims made of it by its manufacturer. (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 02129 Digitally Produced by Mayfield Press (Oxford) Ltd Digitally Produced by Mayfield Press (Oxford) Ltd
2
Sealing Technology
Engineers use ultrasound to improve performance of household oils
I
n the UK, engineers at the University of Sheffield have developed a test procedure to measure the performance of everyday household oils, such as WD-40 multi-use product, which have many applications including loosening rusty bolts and removing dirt and heavy soiling from surfaces. The technique, developed by researchers from the university’s Leonardo Centre for Tribology, uses ultrasound technology to gauge performance of penetrating oils. The technology, which is also used to examine babies in the womb enables engineers to measure and monitor the interfaces between components, such as the penetrating oils and threads on bolts. The pulse of ultrasound passes through the bolted joint and is reflected by the interface of the threads, whilst the rest is transmitted into the oil. In doing this, engineers can gain a better understanding of how the oils work and, in turn, improve the lubricants. This technique has been embraced by scientists from WD-40 Co, who are now working closely with the research engineers to develop additional products, as extension opportunities under the WD-40 brand, which has been a popular household name and DIY staple since the 1950s. Prior to this research there was no robust or non-destructive way to study the rate at which penetrating oils moved along threaded fasteners such as bolts. Professor Rob Dwyer-Joyce, head of the Leonardo Centre for Tribology at the University of Sheffield said: ‘We can now give an insight into the performance of penetrating oils such as WD-40 multi-use product. This means improvements can be made to yield products that penetrate faster and release rusted bolts more effectively. This, in turn, will enable WD-40 Co to develop higher performance products for its users with more specialised needs.’ ‘Ultrasound measurement can be used on anything lubricated such as artificial hip joints, piston rings, seals and bearings.’ Contact: Professor Rob Dwyer-Joyce, Department of Mechanical Engineering, Sir Frederick Mappin Building, Mappin Street, Sheffield S1 3JD, UK. Tel: +44 114 2227736, Fax: +44 114 2227840, Email: r.dwyer-joyce@sheffield. ac.uk, Web: www.leonardocentre.co.uk
Mechanical seal primary rings seal low-viscosity liquids
U
S-based Metallized Carbon Corp, a manufacturer of oil-free, self-lubricating, carbon-graphite materials for severe service lubrication applications, has announced the availability of mechanical seal primary rings for sealing refrigerants and other low-viscosity liquids. Designing mechanical seals for sealing refrigerants and other low-viscosity liquids has been a difficult problem for seal manufacturers for many years. Low-viscosity liquids such as Freon refrigerants, liquid oxygen, liquid carbon dioxide, propane, ethylene and acetone can be successfully sealed using mechanical seals with Metcar Grade M-444, antimony impregnated, carbongraphite primary seal rings, says the company. Low-viscosity liquids present a challenge to mechanical seals because the hydrodynamic film that they create between the two rubbing seal faces is extremely thin. In order for this film to lubricate the two sealing faces, they must stay highly polished and run in very close proximity to each other. According to Metallized Carbon, it is the self-polishing characteristic of M-444, and the high dimensional stability of both solid silicon carbide and antimony impregnated carbongraphite that enables these two materials to run in the required close proximity. Ordinary mechanical seals with resin impregnated carbon-graphite primary rings do not have the self-polishing characteristic or the dimensional stability that is required for sealing these lowviscosity liquids, says the company. Contact: Metallized Carbon Corp, 19 South Water Street, Ossining, NY 10562, USA. Tel: +1 914 941 3738, Fax: +1 914 941 4050, Email: [email protected], Web: www.metcar.com
Metallized Carbon Corp’s mechanical seal primary rings seal refrigerants and other low-viscosity liquids.
October 2013
Editorial Office: Elsevier Ltd The Boulevard, Langford Lane Kidlington, Oxford OX5 1GB, UK Fax: +44 (0)1865 843973 Web: www.sealingtechnology.info Publisher: GregHopwood Valero Publisher: David 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] Technical Editor: Bob Flitney Technical Flitney Tel: +44 Editor: (0)1588Bob 661056 +44 (0)1799 501659 E-mail:Tel: [email protected] E-mail: [email protected] Production Support Manager: Lin Lucas Production Manager: Lin Lucas E-mail:Support [email protected] E-mail: [email protected] Editorial advisory board: Editorial advisory board: $IDIER &RIBOURG & s #YRIL 8 ,ATTY & 9VES "IREMBAUT & s #YRIL 8 ,ATTY & !MRAT 0ARMAR 5+ s 2ICHARD & 3ALANT 53! !MRAT 0ARMAR 5+ s 2ICHARD & 3ALANT 53! 7OLFGANG 3CHÚPPLEIN $ s 3HUZO 3EYA * 7OLFGANG 3CHÚPPLEIN $ s 3HUZO 3EYA * 3COTT 3VENDSEN 53! s $R "RIAN 3 %LLIS 5+ Scott Svendsen (USA) Subscription Information Subscription Information An annual subscription to Sealing Technology includes 12 An annual issues and subscription online accesstoforSealing up to Technology 5 users. includes 12 issues and online access for up to 5 users. Prices: Prices:for all European countries & Iran 1334 1215 forfor allall European & Iran and Japan US$1495 countriescountries except Europe US$1362 countries except Europe and Japan ¥177 200 for for all Japan ¥161 400 foruntil Japan (Prices valid 31 December 2013) (Prices valid until Octoberto2013) To subscribe send 31 payment the address above. To subscribe send payment to the address above. Tel: +44 (0)1865 843687 Tel: +44 (0)1865 843687/Fax: +44 or via www.sealingtechnology.info (0)1865 834971 Email: [email protected], Subscriptions run for 12 months, from the date payment is or via www.sealingtechnology.info. received. Subscriptions run for 12 months, from the date payment is received. Permissions may be sought directly from Elsevier Global Rights Department, PO Box 800, Oxford OX5 1DX, UK; phone: +44 1865 Permissions be sought from Elsevier Global Rights 843830, fax: may +44 1865 853333,directly email: [email protected]. You Department, PO Box 800, Oxford OX5 through 1DX, UK; phone: home +44 1865 may also contact Global Rights directly Elsevier’s page 843830, fax: +44 1865 853333, [email protected]. You (www.elsevier.com), selecting firstemail: ‘Support & contact’, then ‘Copyright may also contact Rights directly Elsevier’s home page & permission’. In Global the USA, users may through clear permissions and make (www.elsevier.com), first ‘Support Center, & contact’, payments through theselecting Copyright Clearance Inc.,then 222 ‘Copyright Rosewood & permission’. In the USA,USA; users may +1 clear and+1make Drive, Danvers, MA 01923, phone: 978permissions 750 8400, fax: 978 payments through thethrough Copyright Clearance Center, Inc.,Rapid 222 750 4744, and in the UK the Copyright Licensing Agency Rosewood Service Drive, Danvers, MA9001923, USA; phone: +1 978 750 8400, Clearance (CLARCS), Tottenham Court Road, London W1P fax: +1 750+44 4744, and7631 in the UK through Copyright Licensing 0LP, UK;978 phone: (0)20 5555; fax: +44the (0)20 7631 5500. Other Agency Rapid Service (CLARCS), 90 Tottenham Court Road, countries may Clearance have a local reprographic rights agency for payments. London W1PWorks 0LP, UK; phone: +44 (0)20 7631 5555; fax: +44 (0)20 Derivative 7631 5500.may Other countries mayofhave a local reprographic Subscribers reproduce tables contents or prepare lists ofrights artiagency for payments. cles including abstracts for internal circulation within their institutions. DerivativeofWorks Permission the Publisher is required for resale or distribution outside Subscribers mayPermission reproduce of tables contentsisorrequired preparefor listsallofother artithe institution. the of Publisher cles including abstracts for compilations internal circulation within their institutions. derivative works, including and translations. Permission ofStorage the Publisher is required for resale or distribution outside Electronic or Usage the institution. Permission Publisher is required for all other Permission of the Publisherofis the required to store or use electronically derivative works, including compilations and translations. any material contained in this journal, including any article or part of Electronic Storage or Usage an article. Except as outlined above, no part of this publication may Permission of the Publisher is required to or store or use electronically be reproduced, stored in a retrieval system transmitted in any form anybymaterial contained in thismechanical, journal, including any article or part or of or any means, electronic, photocopying, recording an article. Except outlined above, no partofofthe thisPublisher. publication may otherwise, withoutasprior written permission Address be reproduced, storedto: in Elsevier a retrieval system or transmitted in any form permissions requests Science Global Rights Department, at or by anyfax means, electronic, mechanical, photocopying, recording or the mail, and email addresses noted above. otherwise, without prior written permission of the Publisher. Address Notice permissions requests to: Elsevier Science Global Department, at No responsibility is assumed by the Publisher forRights any injury and/ thedamage mail, faxtoand emailoraddresses above.of products liability, or persons property noted as a matter Notice negligence or otherwise, or from any use or operation of any methNo responsibility is assumed thecontained Publisher in forthe anymaterial injury and/ ods, products, instructions or by ideas herein. or damage persons as a matter of products liability, Because of to rapid advanorcesproperty in the medical sciences, in particular, indenegligence or otherwise, or from any or dosages operation of anybemethpendent verification of diagnoses anduse drug should made. ods, products, instructionsmaterial or ideasis contained in conform the material herein. Although all advertising expected to to ethical Because ofstandards, rapid advan ces in the medical sciences, in particular, inde-a (medical) inclusion in this publication does not constitute pendent verification of diagnoses and drug be made. guarantee or endorsement of the quality or dosages value of should such product or Although all advertising material is expected to conform to ethical of the claims made of it by its manufacturer. (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 02129 Digitally Produced by Mayfield Press (Oxford) Ltd Digitally Produced by Mayfield Press (Oxford) Ltd
2
Sealing Technology
Engineers use ultrasound to improve performance of household oils
I
n the UK, engineers at the University of Sheffield have developed a test procedure to measure the performance of everyday household oils, such as WD-40 multi-use product, which have many applications including loosening rusty bolts and removing dirt and heavy soiling from surfaces. The technique, developed by researchers from the university’s Leonardo Centre for Tribology, uses ultrasound technology to gauge performance of penetrating oils. The technology, which is also used to examine babies in the womb enables engineers to measure and monitor the interfaces between components, such as the penetrating oils and threads on bolts. The pulse of ultrasound passes through the bolted joint and is reflected by the interface of the threads, whilst the rest is transmitted into the oil. In doing this, engineers can gain a better understanding of how the oils work and, in turn, improve the lubricants. This technique has been embraced by scientists from WD-40 Co, who are now working closely with the research engineers to develop additional products, as extension opportunities under the WD-40 brand, which has been a popular household name and DIY staple since the 1950s. Prior to this research there was no robust or non-destructive way to study the rate at which penetrating oils moved along threaded fasteners such as bolts. Professor Rob Dwyer-Joyce, head of the Leonardo Centre for Tribology at the University of Sheffield said: ‘We can now give an insight into the performance of penetrating oils such as WD-40 multi-use product. This means improvements can be made to yield products that penetrate faster and release rusted bolts more effectively. This, in turn, will enable WD-40 Co to develop higher performance products for its users with more specialised needs.’ ‘Ultrasound measurement can be used on anything lubricated such as artificial hip joints, piston rings, seals and bearings.’ Contact: Professor Rob Dwyer-Joyce, Department of Mechanical Engineering, Sir Frederick Mappin Building, Mappin Street, Sheffield S1 3JD, UK. Tel: +44 114 2227736, Fax: +44 114 2227840, Email: r.dwyer-joyce@sheffield. ac.uk, Web: www.leonardocentre.co.uk
Mechanical seal primary rings seal low-viscosity liquids
U
S-based Metallized Carbon Corp, a manufacturer of oil-free, self-lubricating, carbon-graphite materials for severe service lubrication applications, has announced the availability of mechanical seal primary rings for sealing refrigerants and other low-viscosity liquids. Designing mechanical seals for sealing refrigerants and other low-viscosity liquids has been a difficult problem for seal manufacturers for many years. Low-viscosity liquids such as Freon refrigerants, liquid oxygen, liquid carbon dioxide, propane, ethylene and acetone can be successfully sealed using mechanical seals with Metcar Grade M-444, antimony impregnated, carbongraphite primary seal rings, says the company. Low-viscosity liquids present a challenge to mechanical seals because the hydrodynamic film that they create between the two rubbing seal faces is extremely thin. In order for this film to lubricate the two sealing faces, they must stay highly polished and run in very close proximity to each other. According to Metallized Carbon, it is the self-polishing characteristic of M-444, and the high dimensional stability of both solid silicon carbide and antimony impregnated carbongraphite that enables these two materials to run in the required close proximity. Ordinary mechanical seals with resin impregnated carbon-graphite primary rings do not have the self-polishing characteristic or the dimensional stability that is required for sealing these lowviscosity liquids, says the company. Contact: Metallized Carbon Corp, 19 South Water Street, Ossining, NY 10562, USA. Tel: +1 914 941 3738, Fax: +1 914 941 4050, Email: [email protected], Web: www.metcar.com
Metallized Carbon Corp’s mechanical seal primary rings seal refrigerants and other low-viscosity liquids.
October 2013