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Standard Cartridge Double Seal

  • Equipped with flushing, quenching, and drainports as standard.
  • PTFE backup ring as standard.


  • Cartridge
  • Balanced
  • Double seal
  • Independent of direction of rotation
  • Springs do not contact the liquid
  • Inboard seal can withstand both forward and back pressure

Product specification example


Seal face (Inboard side) : Silicon carbide (Q1)
Seal face (Atmosphere side) : High density
carbon graphite Seat : Silicon carbide (Q1)
Metal parts: CrNiMo steel 316(G)

Secondary seals: FKM (V)

Operating range

Pressure: p = Vacuum … 16 bar (232 PSI)
Temperature: t = -20 °C … 160 °C (-4 °F … 320 °F) (oil),
0 °C … 80 °C (32 °F … 176 °F) (water)
Sliding velocity: vg = 20 m/s (66 ft/s)
Viscosity: … 1 Pa·s
Solids content: … 7wt. %

Recommended applications

Petrochemical industry
Chemical industry
Pharmaceutical industry
Pulp and paper industry
Water and waste water technology
Food and beverage industry
Metal production and processing
Alkaline solutions
Salt solutions
Low viscosity oils
Chemical pumps
Process pumps

Applicable ranges shown in the product introduction are limit values for each standard material.
Applicable ranges, performance data and figures can serve only as a guide for selection and therefore in actual use there will be some cases where general specifications cannot be applied due to unknown factors or constraints.
Please check the applicability before use.
The contents are subject to change without notice for improvement.


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