... plastic seal materials are used. Hydrodynamic lubrication with plastic seals significantly increases the PV capability of the seals beyond what is achievable with elastomer seals. An axially force balanced, radially pressure balanced backup ring having a very small clearance with the shaft is interposed...

... strategic planning and management modeling & simulation resistance extreme environment backup ring polymer Groves , S. In Meeting increased demands of offshore developments . Oilfield Engineering with Polymers , Smithers-Rapra : 2006 . DeBruijn , G. , Greenway , R...

... arrangement and has been proven to be reliable in various tests and many real applications. The sealing of gas, however, is very difficult due to its low viscosity and the risk of fire and explosion in case of leakage. extrusion gap fpso backup ring seal diameter swivel concept seal swivel new...