Gas Tight Ring Solution in none-lube service Hydrogen application
Conventional sealing ring designs have a lot of gaps which are necessary to compensate the worn off ring material. Although those gaps are covered by separate cover rings, it is not possible to get those dynamic systems absolutely gastight.
Internal parts piston rod packing
Nitrogen application
The sealing material of internal parts was too brittle with only 0.5 % of elongation at break. Due to ring breakage, springs were also affected, and leakage rates went up because sealing efficiency was no longer given.
Internal parts made of PTFE compounds are chemically decomposed during the compression of fluorinated gases. The inner parts swell and the temperatures rise during operation.
CHALLENGE – Search for suitable chemically inert material
Internal Parts piston rod packing
Hydrogen application
Internal parts do not seal properly on the piston rod, allowing lubricating oil to enter the intermediate piece. The lack of lubrication in turn causes excessive wear of the internal parts.
