Effective sealing in extremely high pressures
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Trelleborg Sealing Solutions product story
Edited by the Engineeringtalk editorial team
Jul 17, 2000
Examples of sealing advances achieved by Busak+Shamban include sealing for Gas Flare Nozzles, where temperatures to 400C and pressures to 200MPa have to be coped with
Sealing and bearing systems for the high pressure, chemically hostile environments encountered in the oil, gas and processing industries require precise configuration.
Well head connectors, loading swivels and valves, multiphase flow meters, subsea separation and water injection systems are all critical applications where optimum performance is essential to success.
Advances in sealing system engineering have helped to reduce sealing failure, leakage and potential danger.
Examples of sealing advances achieved by Busak+Shamban include Sealing for Gas Flare Nozzles, where a sealing system capable of withstanding temperatures to 400C (750degF) and pressures to 200 MPa (30,000 psi) is required.
The gas flare lines, which recover hydrocarbon gas in the flare system and route the gas back to the main process, remain closed during recovery of the flare gas by means of a valve installed downstream of the flare knock-out drum.
Effective sealing is critical to avoid failure of the nozzle that opens as gas is diverted to the flare.
The solution was found in the form of Wills Rings.
Constructed of metal, Wills Rings provide effective sealing in extreme high pressures, vacuums and the extremely high temperatures associated with this application, permitting the nozzle to open and close effectively as required.
A further example of new sealing technology enhancing performance and operational safety in the oil, gas and processing industries is the sealing arrangement pioneered by Busak+Shamban for safety valves.
These pilot-operated mechanisms utilise a flapper to prevent fluids or gas from exploding downhole.
The system cycles infrequently and often is static at full pressure for several months at a time.
The application requires a high pressure sealing system with long service life and an ability to seal against nitrogen, ethylene glycol, sour gas and acids.
The solution was found in the use of Turcon Variseal W.
Incorporating a Slantcoil spring, the seal is very effective in controlling friction and being made of Turcon T42 material, the seal forms an effective barrier against highly corrosive materials and extreme pressures.
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