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Bellows tandem seals

TO ORDER

APPLICATION

Applied in pump units and equipment where sealed fluids are oil products, liquids with harmful chemical agents, including dissolving rubber, at process operating temperatures up to 400°C.
Are used in case of hindered clean cooling liquid supply.

FEATURES

  • Penetration of barrier fluid into sealed fluid is eliminated.
  • First (circuit) friction pair operates at barrier fluid and sealed fluid pressure drop. Second, atmospheric one, - at barrier fluid and air pressure difference.
  • Barrier fluid is a chemically unaggressive, non-toxic liquid, compatible with sealed fluid.
  • No elastomer.
  • Rotating bellows blocks provide for corrugations self-cleaning.
  • Piping is performed according to API 682: Plan 52.

TECHNICAL PARAMETERS

Shaft diameter, mm
30 … 100
Shaft speed, Rpm max 5000
Temperature of sealed medium, °С  -70 … 400
Pressure of medium, MPa Up to 20 
Max. leakage, l/h  0,002
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