- Email: [email protected]
New silicone rubber with improved fluid resistance
NEWS
On-site joining makes lip seals attractive for water turbines James Walker has reported on two applications of large-diameter lips seals to water turbines using its on-site joining technique. In the first, three Walkersele Ultraglide rotary lip seals were fitted to a Kaplan turbine in Poland, to overcome shaft wear problems. They were installed at Dychow for Voith Siemens Hydro Power Generation using the OSJ on-site joining technique, without dismantling the shaft assembly. The original nitrile-based lip seals had worn grooves in the shaft sleeve within four months. Replacements were made using Walkersele Ultraglide to take advantage of improved wear resistance, heat dissipation and self-lubricating properties [Sealing Technology, August 2004]. These were important factors for a shaft running at 7.5 m/s and 0.5 bar head, and water as the only lubricant. Two
seals were fitted back-to-back around the 750 mm diameter turbine shaft at the bottom of the water-cooled PTFE bearing, and the third above the bearing. In a second installation, the turbine shaft seals on an EDF hydroelectric scheme at Villeneuve, France were converted to rotary lip seals. The bulb-type Alsthom 13 MW turbine with 4.4 m diameter blades works at an effective pressure head of 13 m and river flow of 150 m³/s. Shaft sealing behind the turbine head had used a balanced spring mechanical seal, backed by a braided seal on the water side working in parallel with a similar seal to prevent oil leakage. Three seals were replaced with 780 mm ID Walkerseles of D7 design, with a nitrile rubber lip and aramid reinforced back. These run on a special tungsten carbide coated shaft sleeve, custom-designed for the
New silicone rubber with improved fluid resistance GE Advanced Materials has introduced a new liquid silicone rubber (LSR) grade to provide improved oil and fuel resistance, self-lubrication and processing. This fast-curing silicone elastomer is intended for gasketing and sealing in under-the-hood automotive applications. The new formulation, FSL 7586/40 TP3854, incorporates tailored fluorine structures that enable it to deliver processing
performance similar to non-fluorinated LSRs, but with better chemical resistance. This makes it suitable for applications requiring occasional contact with automotive fuels or long-term contact with most oils. Contact: GE Advanced Materials, Plasticslaan 1, NL-4600 AC Bergen op Zoom, The Netherlands. Tel: +31 164 292097, Web: www.geadvancedmaterials.com
Editorial office: Elsevier Advanced Technology, PO Box 150, Kidlington, Oxford OX5 1AS, UK. Tel: +44 (0)1865 843239, Fax: +44 (0)1865 843971 Editor: Bob Flitney, Tel: +44 (0)1799 501659, Email: [email protected] In-House Editor: Steve Barrett, Email: [email protected] Production Coordinator: Lin Lucas Editorial advisory board: Yves Birembaut (F) • Birger Dühring (DK) • Cyril X Latty (F) • Amrat Parmar (UK) • Richard F Salant (USA) • Wolfgang Schöpplein (D) • Scott Svendsen (USA) • Neil M Wallace (UK) Permissions may be sought directly from Elsevier Rights & Permissions Department, PO Box 800, Oxford OX5 1DX, UK; Tel: +44 (0)1865 843830, Fax: +44 (0)1865 853333, Email: [email protected]. You may also contact Rights & Permissions directly through Elsevier’s home page (http://www.elsevier.com), selecting first ‘Customer Support’, then ‘General Information’, then ‘Permissions Query Form’. In the USA, users may clear permissions and make payments through the Copyright Clearance Center, Inc, 222 Rosewood Drive, Danvers, MA 01923, USA; Tel: +1 978 7508400, Fax: +1 978 7504744, and in the UK through the Copyright Licensing Agency Rapid Clearance Service (CLARCS), 90 Tottenham Court Road, London W1P 0LP, UK; Tel: +44 (0)207 436 5931; Fax: +44 (0)207 631 5500. Other countries may have a local reprographic rights agency for payments.
2
IN BRIEF AESseal opens new test facility Heinz P. Bloch, one of the world’s leading rotating equipment engineers, recently opened the new AESseal testing facility in Rotherham, UK. The facility represents an investment of more than £1 million in the building, and considerably more in the facilities. The company believes that it is the most advanced facility of its kind in the world. Intelligent engine cooling pumps to be introduced Dana Corporation plans to introduce a family of advanced intelligent cooling pumps. The three new brushless DC electric coolant pumps deliver accurate and reliable temperature control to meet the requirements of a wide range of applications, including engine cooling, charge-air circuit cooling, and hybrid-vehicle power-train cooling. Editor’s comment: Might this be another method to combat the cooling pump seal issues discussed in our news feature this month (pp. 10–11)? project, with the two innermost seals positioned back-to-back to prevent oil leakage and water ingress at the generator. The seals were installed within a very short timescale, with the splittype sleeve fitted and accurately balanced without dismantling the assembly. Three seals were then joined on-site around the shaft in
just 2.5 hours. The seals have now run trouble-free for more than 15 months, with the second turbine expected to be converted in 2005. Contact: James Walker & Co Ltd, 1 Millennium Gate, Westmere Drive, Crewe CW1 6AY, UK. Tel: +44 1270 536000, Web: www.jameswalker.co.uk
New material for dry compressors introduced France Compressor Products has announced the introduction of a new specialty performance material for reciprocating compressor piston rings, rider bands and packing rings used in ‘bone-dry’ applications. The material, called FSP 2005, is designed primarily for ‘bonedry’ gas environments, and has a temperature resistance of more than 150°C. It demonstrates
extremely low wear rates at higher temperatures. The material is now being recommended for applications such as pure dry nitrogen, argon and helium. Contact: France Compressor Products, 4410 Greenbriar Drive, Stafford, TX 77477, USA. Tel: +1 281 207 4600, Fax: +1 281 207 4612, Web: www.francecompressor.com
Derivative Works Subscribers may reproduce tables of contents or prepare lists of articles including abstracts for internal circulation within their institutions. Permission of the publisher is required for resale or distribution outside the institution. Permission of the publisher is required for all other derivative works, including compilations and translations. Electronic Storage or Usage Permission of the publisher is required to store or use electronically any material contained in this journal, including any article or part of an article. Contact the publisher at the address indicated. Except as outlined above, no part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without prior written permission of the publisher. Address permissions requests to: Elsevier Rights & Permissions Department, at the mail, fax and email addresses noted above. Notice No responsibility is assumed by the publisher for any injury and/or damage to persons or property as a matter of products liability, negligence or otherwise, or 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. 02129 Printed by Mayfield Press (Oxford) Ltd
Sealing Technology July 2005
On-site joining makes lip seals attractive for water turbines James Walker has reported on two applications of large-diameter lips seals to water turbines using its on-site joining technique. In the first, three Walkersele Ultraglide rotary lip seals were fitted to a Kaplan turbine in Poland, to overcome shaft wear problems. They were installed at Dychow for Voith Siemens Hydro Power Generation using the OSJ on-site joining technique, without dismantling the shaft assembly. The original nitrile-based lip seals had worn grooves in the shaft sleeve within four months. Replacements were made using Walkersele Ultraglide to take advantage of improved wear resistance, heat dissipation and self-lubricating properties [Sealing Technology, August 2004]. These were important factors for a shaft running at 7.5 m/s and 0.5 bar head, and water as the only lubricant. Two
seals were fitted back-to-back around the 750 mm diameter turbine shaft at the bottom of the water-cooled PTFE bearing, and the third above the bearing. In a second installation, the turbine shaft seals on an EDF hydroelectric scheme at Villeneuve, France were converted to rotary lip seals. The bulb-type Alsthom 13 MW turbine with 4.4 m diameter blades works at an effective pressure head of 13 m and river flow of 150 m³/s. Shaft sealing behind the turbine head had used a balanced spring mechanical seal, backed by a braided seal on the water side working in parallel with a similar seal to prevent oil leakage. Three seals were replaced with 780 mm ID Walkerseles of D7 design, with a nitrile rubber lip and aramid reinforced back. These run on a special tungsten carbide coated shaft sleeve, custom-designed for the
New silicone rubber with improved fluid resistance GE Advanced Materials has introduced a new liquid silicone rubber (LSR) grade to provide improved oil and fuel resistance, self-lubrication and processing. This fast-curing silicone elastomer is intended for gasketing and sealing in under-the-hood automotive applications. The new formulation, FSL 7586/40 TP3854, incorporates tailored fluorine structures that enable it to deliver processing
performance similar to non-fluorinated LSRs, but with better chemical resistance. This makes it suitable for applications requiring occasional contact with automotive fuels or long-term contact with most oils. Contact: GE Advanced Materials, Plasticslaan 1, NL-4600 AC Bergen op Zoom, The Netherlands. Tel: +31 164 292097, Web: www.geadvancedmaterials.com
Editorial office: Elsevier Advanced Technology, PO Box 150, Kidlington, Oxford OX5 1AS, UK. Tel: +44 (0)1865 843239, Fax: +44 (0)1865 843971 Editor: Bob Flitney, Tel: +44 (0)1799 501659, Email: [email protected] In-House Editor: Steve Barrett, Email: [email protected] Production Coordinator: Lin Lucas Editorial advisory board: Yves Birembaut (F) • Birger Dühring (DK) • Cyril X Latty (F) • Amrat Parmar (UK) • Richard F Salant (USA) • Wolfgang Schöpplein (D) • Scott Svendsen (USA) • Neil M Wallace (UK) Permissions may be sought directly from Elsevier Rights & Permissions Department, PO Box 800, Oxford OX5 1DX, UK; Tel: +44 (0)1865 843830, Fax: +44 (0)1865 853333, Email: [email protected]. You may also contact Rights & Permissions directly through Elsevier’s home page (http://www.elsevier.com), selecting first ‘Customer Support’, then ‘General Information’, then ‘Permissions Query Form’. In the USA, users may clear permissions and make payments through the Copyright Clearance Center, Inc, 222 Rosewood Drive, Danvers, MA 01923, USA; Tel: +1 978 7508400, Fax: +1 978 7504744, and in the UK through the Copyright Licensing Agency Rapid Clearance Service (CLARCS), 90 Tottenham Court Road, London W1P 0LP, UK; Tel: +44 (0)207 436 5931; Fax: +44 (0)207 631 5500. Other countries may have a local reprographic rights agency for payments.
2
IN BRIEF AESseal opens new test facility Heinz P. Bloch, one of the world’s leading rotating equipment engineers, recently opened the new AESseal testing facility in Rotherham, UK. The facility represents an investment of more than £1 million in the building, and considerably more in the facilities. The company believes that it is the most advanced facility of its kind in the world. Intelligent engine cooling pumps to be introduced Dana Corporation plans to introduce a family of advanced intelligent cooling pumps. The three new brushless DC electric coolant pumps deliver accurate and reliable temperature control to meet the requirements of a wide range of applications, including engine cooling, charge-air circuit cooling, and hybrid-vehicle power-train cooling. Editor’s comment: Might this be another method to combat the cooling pump seal issues discussed in our news feature this month (pp. 10–11)? project, with the two innermost seals positioned back-to-back to prevent oil leakage and water ingress at the generator. The seals were installed within a very short timescale, with the splittype sleeve fitted and accurately balanced without dismantling the assembly. Three seals were then joined on-site around the shaft in
just 2.5 hours. The seals have now run trouble-free for more than 15 months, with the second turbine expected to be converted in 2005. Contact: James Walker & Co Ltd, 1 Millennium Gate, Westmere Drive, Crewe CW1 6AY, UK. Tel: +44 1270 536000, Web: www.jameswalker.co.uk
New material for dry compressors introduced France Compressor Products has announced the introduction of a new specialty performance material for reciprocating compressor piston rings, rider bands and packing rings used in ‘bone-dry’ applications. The material, called FSP 2005, is designed primarily for ‘bonedry’ gas environments, and has a temperature resistance of more than 150°C. It demonstrates
extremely low wear rates at higher temperatures. The material is now being recommended for applications such as pure dry nitrogen, argon and helium. Contact: France Compressor Products, 4410 Greenbriar Drive, Stafford, TX 77477, USA. Tel: +1 281 207 4600, Fax: +1 281 207 4612, Web: www.francecompressor.com
Derivative Works Subscribers may reproduce tables of contents or prepare lists of articles including abstracts for internal circulation within their institutions. Permission of the publisher is required for resale or distribution outside the institution. Permission of the publisher is required for all other derivative works, including compilations and translations. Electronic Storage or Usage Permission of the publisher is required to store or use electronically any material contained in this journal, including any article or part of an article. Contact the publisher at the address indicated. Except as outlined above, no part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without prior written permission of the publisher. Address permissions requests to: Elsevier Rights & Permissions Department, at the mail, fax and email addresses noted above. Notice No responsibility is assumed by the publisher for any injury and/or damage to persons or property as a matter of products liability, negligence or otherwise, or 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. 02129 Printed by Mayfield Press (Oxford) Ltd
Sealing Technology July 2005