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Asbestos-free gland packing for industrial applications
Dynamic sealing so that it is unnecessary for large volumes of fumes to be produced in order to expand the components. The fumes which are released are non-toxic. The Rise system has been comprehensively and successfully tested by accredited institutes in a number of countries. The system is certified for application in shipbuilding and on offshore installations. Contact: Beunkdijk 11,7122 NZ Aalten, The Netherlands.Tel: +31 5437 61673;Fax: +31
5437
61786.
Asbestos-free gland packing for industrial applications A range of high integrity asbestos-free packings for industrial applications has been introduced by John Crane. Providing high mechanical strength and stability, the packings operate at temperatures from -240 to + 650 “C with pressures up to 350 bar. Suitable for all rotating equipment such as pumps, valves and mixers, they exhibit good resistance to a wide range of demanding environments where acid attack, caustic solutions, hydrocarbons, slurry and high pressure steam could cause equipment failure. The range includes Grafoil, an expanded graphite corrugated tape that retains compressibility with a low coefficient of friction which virtually eliminates shaft and stem wear and Cran-tex, a 100% expanded PTFE fluorocarbon continuous cord for standard flanges, pump casings and irregular jointing applications. Contact: The Marketing Development Group, John Crane International, Crossbow House, 40 Liverpool Road, Slough, Berks SLl 4QX, UK. Tel: +44 1753 531122; Fax: +44 1753 810604.
Quick disconnect couplings for the offshore industry Sub-sea couplings, developed by Snap-tite, utilize elastomer seals or polymer seals manufactured from polyetheretherketone (PEEK). This material is used as a direct replacement for metal seals. It is used extensively for pump and valve seals for sub-sea applications, chemical processing equipment and other highly
Sealing Technology No. 14
corrosive fluids. The mechanical tensile strength of PEEK is comparable to that of materials commonly used in metal seals. PEEK has excellent abrasion resistance and temperature stability which ls very important for seals used in the offshore industry. Its set resistance, or memory, exceeds that of normal seals by a factor of approximately 2O:l and can tolerate greater abusive use. Its physical strength, flexibility, corrosion resistance ls said to have eliminated the need for metal seals. It has been fully tested for endurance by connecting and disconnecting under water while pressurized to 590 bar (10000 psi) ln excess of 5000 cycles. Using this seal material has eliminated the need for elastomer back-up seals and their inherent limitations. Snap-tite has been designing and manufacturing couplings for industries such as aerospace, electronic cooling, mobile equipment, appliance and offshore. Among its customers are Saga Snorre, British Gas Morecambe Bay, Norske Hydro Oseberg, BP Bruce, Shell Nelson, Kerr McGeeGryphon, Conoco Lyell, Texaco Strathspey and Agip Toni Fields. Contact: Snap-tite Europe BV, Industrial Estate, Whitemill - Wexford, Republic of Ireland. Tel: +353 53 41566;Fax: +353 53 41582.
Pusher seal for API 682 flashing hydrocarbon services EG&G Seal01 has introduced the Type 594 high performance pusher seal, designed specifically to meet current safety, emission and MTBF requirements for flashing hydrocarbon services. The primary design goals are summarised by the API 682 mission statement, “...to have a high probability of meeting the objective of at least three years of uninterrupted service while complying with emission requhements.” All recommendations in the API 682 Standard were considered during the design process. In addition, many performance enhancing features are included that are said to increase face lubrication and thereby decrease the potential for product flashing and increased leakage. In accordance with API 682, qualification testing was conducted on 50 mm and 100 mm sizes in propane. Testing included a minimum 100 hour dynamic phase, a 4 hour dynamic phase and a cyclic phase where flashing to vapour was induced a minimum of 5 times. Throughout testing, emissions were monitored per EPA Method 21 with readings taken at 4 points around the seal and the highest reading recorded. The integrity of the seal was further confirmed by field testing.
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5437
61786.
Asbestos-free gland packing for industrial applications A range of high integrity asbestos-free packings for industrial applications has been introduced by John Crane. Providing high mechanical strength and stability, the packings operate at temperatures from -240 to + 650 “C with pressures up to 350 bar. Suitable for all rotating equipment such as pumps, valves and mixers, they exhibit good resistance to a wide range of demanding environments where acid attack, caustic solutions, hydrocarbons, slurry and high pressure steam could cause equipment failure. The range includes Grafoil, an expanded graphite corrugated tape that retains compressibility with a low coefficient of friction which virtually eliminates shaft and stem wear and Cran-tex, a 100% expanded PTFE fluorocarbon continuous cord for standard flanges, pump casings and irregular jointing applications. Contact: The Marketing Development Group, John Crane International, Crossbow House, 40 Liverpool Road, Slough, Berks SLl 4QX, UK. Tel: +44 1753 531122; Fax: +44 1753 810604.
Quick disconnect couplings for the offshore industry Sub-sea couplings, developed by Snap-tite, utilize elastomer seals or polymer seals manufactured from polyetheretherketone (PEEK). This material is used as a direct replacement for metal seals. It is used extensively for pump and valve seals for sub-sea applications, chemical processing equipment and other highly
Sealing Technology No. 14
corrosive fluids. The mechanical tensile strength of PEEK is comparable to that of materials commonly used in metal seals. PEEK has excellent abrasion resistance and temperature stability which ls very important for seals used in the offshore industry. Its set resistance, or memory, exceeds that of normal seals by a factor of approximately 2O:l and can tolerate greater abusive use. Its physical strength, flexibility, corrosion resistance ls said to have eliminated the need for metal seals. It has been fully tested for endurance by connecting and disconnecting under water while pressurized to 590 bar (10000 psi) ln excess of 5000 cycles. Using this seal material has eliminated the need for elastomer back-up seals and their inherent limitations. Snap-tite has been designing and manufacturing couplings for industries such as aerospace, electronic cooling, mobile equipment, appliance and offshore. Among its customers are Saga Snorre, British Gas Morecambe Bay, Norske Hydro Oseberg, BP Bruce, Shell Nelson, Kerr McGeeGryphon, Conoco Lyell, Texaco Strathspey and Agip Toni Fields. Contact: Snap-tite Europe BV, Industrial Estate, Whitemill - Wexford, Republic of Ireland. Tel: +353 53 41566;Fax: +353 53 41582.
Pusher seal for API 682 flashing hydrocarbon services EG&G Seal01 has introduced the Type 594 high performance pusher seal, designed specifically to meet current safety, emission and MTBF requirements for flashing hydrocarbon services. The primary design goals are summarised by the API 682 mission statement, “...to have a high probability of meeting the objective of at least three years of uninterrupted service while complying with emission requhements.” All recommendations in the API 682 Standard were considered during the design process. In addition, many performance enhancing features are included that are said to increase face lubrication and thereby decrease the potential for product flashing and increased leakage. In accordance with API 682, qualification testing was conducted on 50 mm and 100 mm sizes in propane. Testing included a minimum 100 hour dynamic phase, a 4 hour dynamic phase and a cyclic phase where flashing to vapour was induced a minimum of 5 times. Throughout testing, emissions were monitored per EPA Method 21 with readings taken at 4 points around the seal and the highest reading recorded. The integrity of the seal was further confirmed by field testing.
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