- Email: [email protected]
New liquid-phase silicon carbide introduced for oil and gas seals
NEWS
New seal designed for rolling mills Carcoseal has introduced a rotary shaft seal with a new profile, it is the ATLMP which has an anti twist lip. The new seal is specifically designed for the difficult working conditions experienced in heavy industry, such as rolling mills. The full designation of the seal indicates: • • • • •
A - Anti T - Twist L - Lip M - Molla (spring) P - Protetta (protected)
The design has been developed to assist with problems experienced in rolling mills. When the refurbished roll is being fitted into the chock, a substantial number of oil seals are damaged. The lip then is unable to seal and the spring can be damaged and come out of the groove and get into the bearing. In particular the seal may be damaged because the lip is twisted or the spring may be damaged and displaced from its groove. The special shape of the ATLMP is designed to prevent twisting back
The ATMLP seal from Carco is designed for industrial applications such as rolling mills and has an anti twist lip and protected spring.
and to work as a shock absorber when the roll crashes against the lip. The lip has a big chamfer to ease roll fitting and the spring is protected and closed into the groove. The seal is usually supplied as an SCA version with lubrication grooves to have lubricant between a pair of oil seals, fitted in tandem or back to back. Contact: Carco Srl, Via U. Foscolo 4, I20060 – Basiano (MI), Italy. Tel: +39 02 9576 0331, Email: [email protected], Web: www.carcoseal.com
New decompression resistant elastomers designed for extreme conditions Precision Polymer Engineering has developed the Endura range of elastomer seals to cope with the temperature extremes, increasing higher pressures and levels of hydrogen sulphide and other chemicals encountered during oil and gas exploration and processing. The range of materials includes fluorocarbon, FKM, hydrogenated nitrile, HNBR and tetrafluoroethylene propylene, FEPM materials. The overall temperature range that is claimed for these materials is –45ºC to +225ºC. The wide range of chemical resistance available combined with the mechanical properties the materials are designed for applications as diverse as sub surface valves and pumps, to compressors, and down-hole equipment including drill heads.
Sealing Technology May 2007
The Endura mateials have been developed over a two year period. The combination of low temperature capability and high pressure performance has been achieved by careful selection of available polymers and elastomer formulation and characterization. They are designed to offer improved chemical resistance compared to conventional explosive decompression grades, better low temperature capabilities and are compliant with many international explosive decompression standards. Contact: Precision Polymer Engineering Ltd, Greenbank Road, Blackburn BB1 3EA, UK. Tel: +44 1254 295400, Fax: +44 1254 680182, Email: [email protected], Web: www.prepol.com
New liquid-phase silicon carbide introduced for oil and gas seals CoorsTek has introduced a new PhaseSi hybrid liquid phase silicon carbide material developed specifically for severe-service oil and gas seal and valve applications. This new material provides nearly twice the elastic modulus of a traditional alumina material at 420 GPa and a compressive strength of 3600 MPa. This is a 20% improvement over typical direct-sintered silicon carbide. The material is also extremely dense at 3.20 gm/cc and exhibits superior fracture toughness, typically 30% higher than sintered silicon carbide. The intended applications include high-speed, non-contacting gas seals, gas seal rings, aircraft seals, rotary valves, and
other severe-wear components. ‘We developed the PhaseSiC material specifically for severeservice oil and gas seals and seal rings,’ states CoorsTek Energy Group Sales Director, Lloyd Sobel. ‘Every aspect of the material was carefully considered and engineered, from raw material formulation to final processing stages. The result is a unique material specifically tuned for exceptional performance and durability.’ Contact: CoorsTek Corporation, North Table Mountain, 16000 Table Mountain Parkway, Golden, CO 80403, USA. Tel: +1 303 277 7171, Fax: +1 814 834 1430, Email: [email protected], Web: www.coorstek.com
Tailor-made couplings get a grip on steel/GRP connections An application in Vietnam has allowed Viking Johnson to demonstrate the joining of pipes in unusual circumstances. The company is supplying couplings specially designed to accommodate wide variations in pipe outside diameters for the Song Da water supply project, which includes many connections between locally manufactured steel and GRP pipe. The additional tolerance is necessary because the GRP pipes are manufactured by winding the resin-impregnated glass fibres on a tapered mandrel. This produces variations in the outside
diameter, nominally up to 1.8 m, depending on the final wall thickness and the degree of taper at the point where the connection is made. Unusually, the parameters of the Song Da pipes were well beyond the capabilities of even the Large Diameter Maxifit range, which is suitable for ODs from 350 to 600 mm with a tolerance of up to 17 mm. Contact: Viking Johnson, 46–48 Wilbury Way, Hitchin, Hertfordshire SG4 0UD, UK. Tel: +44 1462 443322, Fax: +44 1462 443311, Email: [email protected], Web: www.vikingjohnson.com
Gasket guide is updated The third edition of the guide to gaskets and jointings from James Walker has been introduced. This 44 page guide provides advice on flange sealing techniques and details of the full ranges of gasket and jointing products. Gasket types include metallic and semi-metallic,
plus API and ASME ring joints together with sheet jointings in a range of materials. Contact: James Walker & Co Ltd, Millennium Gate, Westmere Drive, Crewe, Cheshire CW1 6AY, UK. Tel: +44 870 592 5537, Fax: +44 1270 536100, Email: [email protected], Web: www.jameswalker.biz
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New seal designed for rolling mills Carcoseal has introduced a rotary shaft seal with a new profile, it is the ATLMP which has an anti twist lip. The new seal is specifically designed for the difficult working conditions experienced in heavy industry, such as rolling mills. The full designation of the seal indicates: • • • • •
A - Anti T - Twist L - Lip M - Molla (spring) P - Protetta (protected)
The design has been developed to assist with problems experienced in rolling mills. When the refurbished roll is being fitted into the chock, a substantial number of oil seals are damaged. The lip then is unable to seal and the spring can be damaged and come out of the groove and get into the bearing. In particular the seal may be damaged because the lip is twisted or the spring may be damaged and displaced from its groove. The special shape of the ATLMP is designed to prevent twisting back
The ATMLP seal from Carco is designed for industrial applications such as rolling mills and has an anti twist lip and protected spring.
and to work as a shock absorber when the roll crashes against the lip. The lip has a big chamfer to ease roll fitting and the spring is protected and closed into the groove. The seal is usually supplied as an SCA version with lubrication grooves to have lubricant between a pair of oil seals, fitted in tandem or back to back. Contact: Carco Srl, Via U. Foscolo 4, I20060 – Basiano (MI), Italy. Tel: +39 02 9576 0331, Email: [email protected], Web: www.carcoseal.com
New decompression resistant elastomers designed for extreme conditions Precision Polymer Engineering has developed the Endura range of elastomer seals to cope with the temperature extremes, increasing higher pressures and levels of hydrogen sulphide and other chemicals encountered during oil and gas exploration and processing. The range of materials includes fluorocarbon, FKM, hydrogenated nitrile, HNBR and tetrafluoroethylene propylene, FEPM materials. The overall temperature range that is claimed for these materials is –45ºC to +225ºC. The wide range of chemical resistance available combined with the mechanical properties the materials are designed for applications as diverse as sub surface valves and pumps, to compressors, and down-hole equipment including drill heads.
Sealing Technology May 2007
The Endura mateials have been developed over a two year period. The combination of low temperature capability and high pressure performance has been achieved by careful selection of available polymers and elastomer formulation and characterization. They are designed to offer improved chemical resistance compared to conventional explosive decompression grades, better low temperature capabilities and are compliant with many international explosive decompression standards. Contact: Precision Polymer Engineering Ltd, Greenbank Road, Blackburn BB1 3EA, UK. Tel: +44 1254 295400, Fax: +44 1254 680182, Email: [email protected], Web: www.prepol.com
New liquid-phase silicon carbide introduced for oil and gas seals CoorsTek has introduced a new PhaseSi hybrid liquid phase silicon carbide material developed specifically for severe-service oil and gas seal and valve applications. This new material provides nearly twice the elastic modulus of a traditional alumina material at 420 GPa and a compressive strength of 3600 MPa. This is a 20% improvement over typical direct-sintered silicon carbide. The material is also extremely dense at 3.20 gm/cc and exhibits superior fracture toughness, typically 30% higher than sintered silicon carbide. The intended applications include high-speed, non-contacting gas seals, gas seal rings, aircraft seals, rotary valves, and
other severe-wear components. ‘We developed the PhaseSiC material specifically for severeservice oil and gas seals and seal rings,’ states CoorsTek Energy Group Sales Director, Lloyd Sobel. ‘Every aspect of the material was carefully considered and engineered, from raw material formulation to final processing stages. The result is a unique material specifically tuned for exceptional performance and durability.’ Contact: CoorsTek Corporation, North Table Mountain, 16000 Table Mountain Parkway, Golden, CO 80403, USA. Tel: +1 303 277 7171, Fax: +1 814 834 1430, Email: [email protected], Web: www.coorstek.com
Tailor-made couplings get a grip on steel/GRP connections An application in Vietnam has allowed Viking Johnson to demonstrate the joining of pipes in unusual circumstances. The company is supplying couplings specially designed to accommodate wide variations in pipe outside diameters for the Song Da water supply project, which includes many connections between locally manufactured steel and GRP pipe. The additional tolerance is necessary because the GRP pipes are manufactured by winding the resin-impregnated glass fibres on a tapered mandrel. This produces variations in the outside
diameter, nominally up to 1.8 m, depending on the final wall thickness and the degree of taper at the point where the connection is made. Unusually, the parameters of the Song Da pipes were well beyond the capabilities of even the Large Diameter Maxifit range, which is suitable for ODs from 350 to 600 mm with a tolerance of up to 17 mm. Contact: Viking Johnson, 46–48 Wilbury Way, Hitchin, Hertfordshire SG4 0UD, UK. Tel: +44 1462 443322, Fax: +44 1462 443311, Email: [email protected], Web: www.vikingjohnson.com
Gasket guide is updated The third edition of the guide to gaskets and jointings from James Walker has been introduced. This 44 page guide provides advice on flange sealing techniques and details of the full ranges of gasket and jointing products. Gasket types include metallic and semi-metallic,
plus API and ASME ring joints together with sheet jointings in a range of materials. Contact: James Walker & Co Ltd, Millennium Gate, Westmere Drive, Crewe, Cheshire CW1 6AY, UK. Tel: +44 870 592 5537, Fax: +44 1270 536100, Email: [email protected], Web: www.jameswalker.biz
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