- Email: [email protected]
Long-lasting seals are targeted at chemical processing applications
NEWS
Editorial EditorialOffice: Office: Elsevier ElsevierLtd Ltd TheThe Boulevard, Boulevard,Langford Langford Lane Lane Kidlington, Kidlington,Oxford Oxford OX5 OX5 1GB, 1GB,UK UK Fax:Tel: +44 +44 (0)1865 1865 843695 843973 Web: Web: www.sealingtechnology.info www.sealingtechnology.info Publisher: GregAtkinson Valero Editor: Simon E-mail: [email protected] Tel/Fax: +44 (0) 1904 655944 E-mail: [email protected] Editor: Simon Atkinson Production Tel: +44 Support (0) 1904 Manager: 655944Lin Lucas E-mail: [email protected] E-mail: [email protected] Technical Bobboard: Flitney EditorialEditor: advisory +44 (0)1799 501659 DidierTel: Fribourg (F) • Amrat Parmar (UK) E-mail: [email protected] Richard F Salant (USA) Wolfgang Schöpplein (D) • Shuzo (J) Production Support Manager: LinSeya Lucas Scott E-mail: Svendsen (USA) • Dr Brian S Ellis (UK) [email protected] Bob Flitney (UK) Noël Brunetière (F) Editorial advisory board: Yves Information Birembaut (F) • Cyril X Latty (F) Subscription Amrat Parmar (UK) • Richard F Salant (USA) 12 An annual subscription to Sealing Technology includes issues Wolfgang and online access for up to Schöpplein (D)5 •users. Shuzo Seya (J) Subscriptions runScott for 12Svendsen months, from the date (USA) payment is received. Subscription Information AnMore annual subscription www.elsevier.com/journals/instituto Sealing Technology includes 12 information: issues tional/sealing-technology/1350-4789 and online access for up to 5 users. Prices: Permissions be sought directly&from E1215 for allmay European countries Iran Elsevier Global Rights Department, Box 800, Oxford 1DX, and UK; phone: US$1362 for PO all countries exceptOX5 Europe Japan +44 1865 843830, 1865 853333, email: [email protected]. You ¥161 400fax: for+44 Japan may also contact Rights directly through (Prices valid untilGlobal 31 July-November 2019) Elsevier’s home page selecting first ‘Support & contact’, then ‘Copyright To(www.elsevier.com), subscribe send payment to the address above. & permission’. In 843687/Fax: the USA, users+44 may(0)1865 clear permissions Tel: +44 (0)1865 834971 and make payments through the Copyright Clearance Center, Inc., 222 Email: [email protected], Drive, Danvers, MA 01923, USA; phone: +1 978 750 8400, orRosewood via www.sealingtechnology.info. fax: +1 978 750 4744, in the UK from through Copyright Licensing Subscriptions run for and 12 months, thethedate payment is Agency Rapid Clearance Service (CLARCS), 90 Tottenham Court Road, received.
London W1P 0LP, UK; phone: +44 (0)20 7631 5555; fax: +44 (0)20 7631 5500. Other countries may have a local reprographic rights Permissions may be sought directly from Elsevier Global Rights agency for payments. Department, PO Box 800, Oxford OX5 1DX, UK; phone: +44 1865 843830, fax: +44 1865 853333, email: [email protected]. You Derivative Works may also contact Global Rights directly through Elsevier’s home page Subscribers may reproduce tables of contents or prepare lists of (www.elsevier.com), selecting first ‘Support & contact’, then ‘Copyright articles including abstracts for internal circulation within their institu& permission’. In the USA, users may clear permissions and make tions. Permission of the Publisher is required for resale or distribution payments through the Copyright Clearance Center, Inc., 222 outside the institution. Permission of the Publisher is required for Rosewood Drive, Danvers, MA 01923, USA; phone: +1 978 750 8400, all other derivative works, including compilations and translations. fax: +1 978 750 4744, and in the UK through the Copyright Licensing Agency Rapid Clearance Service (CLARCS), 90 Tottenham Court Road, Electronic Storage or Usage London W1P 0LP, UK; phone: +44 (0)20 7631 5555; fax: +44 (0)20 Permission of the Publisher is required to store or use electronically 7631 5500. Other countries may have a local reprographic rights any material contained in this publication, including any article or agency for payments. part of an article. Except as outlined above, no part of this publicaDerivative Works tion may be reproduced, stored in a retrieval system or transmitted Subscribers may reproduce tables of contents or prepare lists of artiin any form or by any means, electronic, mechanical, photocopying, cles including abstracts for internal circulation within their institutions. recording or otherwise, without prior written permission of the Permission of the Publisher is required for resale or distribution outside Publisher. Address permissions requests to: Elsevier Science Global the institution. Permission of the Publisher is required for all other Rights Department, at the mail, fax and email addresses noted above. derivative works, including compilations and translations. Electronic Storage or Usage Notice Permission of the Publisher is required to store or use electronically No responsibility is assumed by the Publisher for any injury and/ any material contained in this journal, including any article or part of or damage to persons or property as a matter of products liability, an article. Except as outlined above, no part of this publication may negligence or otherwise, or from any use or operation of any methbe reproduced, stored in a retrieval system or transmitted in any form ods, products, instructions or ideas contained in the material herein. or by any means, electronic, mechanical, photocopying, recording or Because of rapid advances in the medical sciences, in particular, otherwise, without prior written permission of the Publisher. Address independent verification of diagnoses and drug dosages should be permissions requests to: Elsevier Science Global Rights Department, at made.Although all advertising material is expected to conform to the mail, fax and email addresses noted above. ethical (medical) standards, inclusion in this publication does not Notice constitute a guarantee or endorsement of the quality or value of No responsibility is assumed by the Publisher for any injury and/ such product or of the claims made of it by its manufacturer. or damage to persons or property as a matter of products liability, negligence or otherwise, or from any use or operation of any meth12980 ods, products, instructions or ideas contained in the material herein. Digitally Produced by in particular, indeBecause of rapid advan ces in the medical sciences, pendent verification of diagnoses drug dosages should be made. Mayfield Pressand (Oxford) Limited 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.
Long-lasting seals are targeted at chemical processing applications
D
ichtomatik Ltd – the authorised UK distributor of the DuPontTM Kalrez® perfluoroelastomer (FFKM) range of materials – now supplies Kalrez 7275 seals which, it says, have a long service life in chemical processing applications. As reported previously, DuPont Performance Materials developed the FFKM to achieve a high level of sealing performance in aggressive chemicals processing and manufacturing environments (Sealing Technology, May 2017, page 4). Based on a proprietary and patented crosslinking system that has been developed specifically for the chemical processing industry, the seals exhibit minimal swelling and improved retention of physical properties when exposed to aggressive chemicals such as concentrated nitric acid, organosilanes, chlorosilanes, pure ethylene oxide, butyraldehyde, amines, vinyl monomers and acrylic monomers, says Dichtomatik. Light brown in colour, Kalrez 7275 has a Shore hardness (A) of 75 (on the slab) and 81 Shore M (on the O-ring); 100% modulus of 9.7 MPa; tensile strength at break of 14.5 MPa; elongation at break of 160%; and compression set of 22% (70 hours at 204°C or 400°F). The product is available in a broad series of standard O-ring sizes and custom parts for a wide range of sealing applications. Kalrez 7275 will benefit many applications that depend on mechanical seals as part of their critical processes, including pumps, valves, compressors, filtration columns and analytical equipment. Dichtomatik also offers DuPont Kalrez LS390 series of FFKM sanitary seals that have
been designed specifically for use in sectors that include the life science, food and beverage, and pharmaceutical industries (Sealing Technology July 2019, page 6). For further information, visit: www.dichtomatik-kalrez.co.uk
PBT compounds provide greater resistance to hydrolysis and ageing
S
peciality chemicals company Lanxess has unveiled a new generation of hydrolysis-stabilised polybutylene terephthalate (PBT) compounds. Called Pocan XHR (xtreme hydrolysis resistance), they have been developed to provide greater resistance to hydrolysis and ageing in hot and humid environments in automotive applications. The company says that they have achieved outstanding results in the American Society of Automotive Engineers’ (SAE) SAE/USCAR-2 Rev. 6 long-term tests. ‘In the automotive industry, these tests on the finished part are the absolute benchmark in terms of hydrolysis resistance,’ explained Dr Claudia Dähling, PBT material expert at Lanxess. ‘In our very strict internal specimen tests, based on the USCAR specification procedure, the new compounds achieve Class 4 or even Class 5 – the two highest gradings. This makes them the material of choice for PBT components, which have to work reliably under the influence of humidity and temperature throughout their service life.’ In addition to its outstanding hydrolysis resistance, Pocan XHR has other benefits, says the firm. For example, its elongation properties and high resistance to alternating temperatures make it suitable for over-moulding metal parts that are exposed to temperature fluctuations.
Durability of Kalrez® SpectrumTM 7275 relative to the mean time between repair (MTBR) of the incumbent FFKM in a chlorine dioxide/water stream (bar chart courtesy of Dichtomatik Ltd).
(The content of this02129 newsletter is compiled from Digitallya Produced by Mayfield Pressreleases.) (Oxford) Ltd variety of sources, including press
2
Sealing Technology
November 2019
Editorial EditorialOffice: Office: Elsevier ElsevierLtd Ltd TheThe Boulevard, Boulevard,Langford Langford Lane Lane Kidlington, Kidlington,Oxford Oxford OX5 OX5 1GB, 1GB,UK UK Fax:Tel: +44 +44 (0)1865 1865 843695 843973 Web: Web: www.sealingtechnology.info www.sealingtechnology.info Publisher: GregAtkinson Valero Editor: Simon E-mail: [email protected] Tel/Fax: +44 (0) 1904 655944 E-mail: [email protected] Editor: Simon Atkinson Production Tel: +44 Support (0) 1904 Manager: 655944Lin Lucas E-mail: [email protected] E-mail: [email protected] Technical Bobboard: Flitney EditorialEditor: advisory +44 (0)1799 501659 DidierTel: Fribourg (F) • Amrat Parmar (UK) E-mail: [email protected] Richard F Salant (USA) Wolfgang Schöpplein (D) • Shuzo (J) Production Support Manager: LinSeya Lucas Scott E-mail: Svendsen (USA) • Dr Brian S Ellis (UK) [email protected] Bob Flitney (UK) Noël Brunetière (F) Editorial advisory board: Yves Information Birembaut (F) • Cyril X Latty (F) Subscription Amrat Parmar (UK) • Richard F Salant (USA) 12 An annual subscription to Sealing Technology includes issues Wolfgang and online access for up to Schöpplein (D)5 •users. Shuzo Seya (J) Subscriptions runScott for 12Svendsen months, from the date (USA) payment is received. Subscription Information AnMore annual subscription www.elsevier.com/journals/instituto Sealing Technology includes 12 information: issues tional/sealing-technology/1350-4789 and online access for up to 5 users. Prices: Permissions be sought directly&from E1215 for allmay European countries Iran Elsevier Global Rights Department, Box 800, Oxford 1DX, and UK; phone: US$1362 for PO all countries exceptOX5 Europe Japan +44 1865 843830, 1865 853333, email: [email protected]. You ¥161 400fax: for+44 Japan may also contact Rights directly through (Prices valid untilGlobal 31 July-November 2019) Elsevier’s home page selecting first ‘Support & contact’, then ‘Copyright To(www.elsevier.com), subscribe send payment to the address above. & permission’. In 843687/Fax: the USA, users+44 may(0)1865 clear permissions Tel: +44 (0)1865 834971 and make payments through the Copyright Clearance Center, Inc., 222 Email: [email protected], Drive, Danvers, MA 01923, USA; phone: +1 978 750 8400, orRosewood via www.sealingtechnology.info. fax: +1 978 750 4744, in the UK from through Copyright Licensing Subscriptions run for and 12 months, thethedate payment is Agency Rapid Clearance Service (CLARCS), 90 Tottenham Court Road, received.
London W1P 0LP, UK; phone: +44 (0)20 7631 5555; fax: +44 (0)20 7631 5500. Other countries may have a local reprographic rights Permissions may be sought directly from Elsevier Global Rights agency for payments. Department, PO Box 800, Oxford OX5 1DX, UK; phone: +44 1865 843830, fax: +44 1865 853333, email: [email protected]. You Derivative Works may also contact Global Rights directly through Elsevier’s home page Subscribers may reproduce tables of contents or prepare lists of (www.elsevier.com), selecting first ‘Support & contact’, then ‘Copyright articles including abstracts for internal circulation within their institu& permission’. In the USA, users may clear permissions and make tions. Permission of the Publisher is required for resale or distribution payments through the Copyright Clearance Center, Inc., 222 outside the institution. Permission of the Publisher is required for Rosewood Drive, Danvers, MA 01923, USA; phone: +1 978 750 8400, all other derivative works, including compilations and translations. fax: +1 978 750 4744, and in the UK through the Copyright Licensing Agency Rapid Clearance Service (CLARCS), 90 Tottenham Court Road, Electronic Storage or Usage London W1P 0LP, UK; phone: +44 (0)20 7631 5555; fax: +44 (0)20 Permission of the Publisher is required to store or use electronically 7631 5500. Other countries may have a local reprographic rights any material contained in this publication, including any article or agency for payments. part of an article. Except as outlined above, no part of this publicaDerivative Works tion may be reproduced, stored in a retrieval system or transmitted Subscribers may reproduce tables of contents or prepare lists of artiin any form or by any means, electronic, mechanical, photocopying, cles including abstracts for internal circulation within their institutions. recording or otherwise, without prior written permission of the Permission of the Publisher is required for resale or distribution outside Publisher. Address permissions requests to: Elsevier Science Global the institution. Permission of the Publisher is required for all other Rights Department, at the mail, fax and email addresses noted above. derivative works, including compilations and translations. Electronic Storage or Usage Notice Permission of the Publisher is required to store or use electronically No responsibility is assumed by the Publisher for any injury and/ any material contained in this journal, including any article or part of or damage to persons or property as a matter of products liability, an article. Except as outlined above, no part of this publication may negligence or otherwise, or from any use or operation of any methbe reproduced, stored in a retrieval system or transmitted in any form ods, products, instructions or ideas contained in the material herein. or by any means, electronic, mechanical, photocopying, recording or Because of rapid advances in the medical sciences, in particular, otherwise, without prior written permission of the Publisher. Address independent verification of diagnoses and drug dosages should be permissions requests to: Elsevier Science Global Rights Department, at made.Although all advertising material is expected to conform to the mail, fax and email addresses noted above. ethical (medical) standards, inclusion in this publication does not Notice constitute a guarantee or endorsement of the quality or value of No responsibility is assumed by the Publisher for any injury and/ such product or of the claims made of it by its manufacturer. or damage to persons or property as a matter of products liability, negligence or otherwise, or from any use or operation of any meth12980 ods, products, instructions or ideas contained in the material herein. Digitally Produced by in particular, indeBecause of rapid advan ces in the medical sciences, pendent verification of diagnoses drug dosages should be made. Mayfield Pressand (Oxford) Limited 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.
Long-lasting seals are targeted at chemical processing applications
D
ichtomatik Ltd – the authorised UK distributor of the DuPontTM Kalrez® perfluoroelastomer (FFKM) range of materials – now supplies Kalrez 7275 seals which, it says, have a long service life in chemical processing applications. As reported previously, DuPont Performance Materials developed the FFKM to achieve a high level of sealing performance in aggressive chemicals processing and manufacturing environments (Sealing Technology, May 2017, page 4). Based on a proprietary and patented crosslinking system that has been developed specifically for the chemical processing industry, the seals exhibit minimal swelling and improved retention of physical properties when exposed to aggressive chemicals such as concentrated nitric acid, organosilanes, chlorosilanes, pure ethylene oxide, butyraldehyde, amines, vinyl monomers and acrylic monomers, says Dichtomatik. Light brown in colour, Kalrez 7275 has a Shore hardness (A) of 75 (on the slab) and 81 Shore M (on the O-ring); 100% modulus of 9.7 MPa; tensile strength at break of 14.5 MPa; elongation at break of 160%; and compression set of 22% (70 hours at 204°C or 400°F). The product is available in a broad series of standard O-ring sizes and custom parts for a wide range of sealing applications. Kalrez 7275 will benefit many applications that depend on mechanical seals as part of their critical processes, including pumps, valves, compressors, filtration columns and analytical equipment. Dichtomatik also offers DuPont Kalrez LS390 series of FFKM sanitary seals that have
been designed specifically for use in sectors that include the life science, food and beverage, and pharmaceutical industries (Sealing Technology July 2019, page 6). For further information, visit: www.dichtomatik-kalrez.co.uk
PBT compounds provide greater resistance to hydrolysis and ageing
S
peciality chemicals company Lanxess has unveiled a new generation of hydrolysis-stabilised polybutylene terephthalate (PBT) compounds. Called Pocan XHR (xtreme hydrolysis resistance), they have been developed to provide greater resistance to hydrolysis and ageing in hot and humid environments in automotive applications. The company says that they have achieved outstanding results in the American Society of Automotive Engineers’ (SAE) SAE/USCAR-2 Rev. 6 long-term tests. ‘In the automotive industry, these tests on the finished part are the absolute benchmark in terms of hydrolysis resistance,’ explained Dr Claudia Dähling, PBT material expert at Lanxess. ‘In our very strict internal specimen tests, based on the USCAR specification procedure, the new compounds achieve Class 4 or even Class 5 – the two highest gradings. This makes them the material of choice for PBT components, which have to work reliably under the influence of humidity and temperature throughout their service life.’ In addition to its outstanding hydrolysis resistance, Pocan XHR has other benefits, says the firm. For example, its elongation properties and high resistance to alternating temperatures make it suitable for over-moulding metal parts that are exposed to temperature fluctuations.
Durability of Kalrez® SpectrumTM 7275 relative to the mean time between repair (MTBR) of the incumbent FFKM in a chlorine dioxide/water stream (bar chart courtesy of Dichtomatik Ltd).
(The content of this02129 newsletter is compiled from Digitallya Produced by Mayfield Pressreleases.) (Oxford) Ltd variety of sources, including press
2
Sealing Technology
November 2019