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CMS Standard Cartridge


Our standard, balanced and cartridge CMS Standard Cartridge is available in variants for ANSI pumps (CMS-SN, -SNO, -TN, -QN) and is independent of the direction of rotation.

This type of standard cartridge closure is characterized by being a very economical mechanical seal and easy installation thanks to its pre-assembled unit (reduced downtimes). In addition, it is ideal for standardizations. During assembly, there is no damage caused by the dirt introduced. The shaft is not damaged thanks to its dynamically loaded O-ring. It can be used in universal conversions of original packaging, retrofits or equipment.

Industrial Applications:
  • Chemical industry
  • Food and beverage industry
  • Petrochemical industry
  • Pharmaceutical industry
  • Universally applicable
  • Water and waste water technology
  • Centrifugal pumps
  • Eccentric screw pumps
  • Process pumps

Technical characteristics

  • CMS-SN, -SNO, -QN, -TN
  • Sizes: Upto 100 mm (Upto 4.000") Other sizes on request
  • Temperature: t= -40 °C ... 220 °C (-40 °F ... 428 °F)(Check O-Ring resistance)
  • Sliding face material combination BQ1
  • Pressure: p1 = 25 bar (363 PSI)
  • Speed = 16 m/s (52 ft/s)
  • Sliding face material combination Q1Q1 or U2Q1
  • Pressure: p1 = 12 bar (175 PSI)
  • Speed = 10 m/s (33 ft/s)
  • Permissible axial movement: ± 1.0 mm, d1 ≥ 75 mm ± 1.5 mm


  • Seal face: Sintered Silicon carbide (Q1), Resin impregnated Carbon (B), Nickel Tungsten carbide (U2)
  • Seat: Sintered Silicon carbide (Q1)
  • Secondary seals: FKM (V), EPDM (E), FFKM (K), NBR (N) / PTFE (T)
  • Springs: Hastelloy® C-4 (M)
  • Metal parts: CrNiMo steel (G), CrNiMo cast steel (G)



  • Factory and Headquarters
  • Sealmek Factory
  • Official Distributor