Single Coil Spring Unbalanced/Balanced Mechanical Seals ( Close Type )

LPS-061-U/LPS-065-U & LPS-071-B/LPS-075-B

LPS-061-U /LPS-065-U & LPS-071-B/LPS-075-B series are single helical coil spring unbalanced/balanced Mechanical Seals developed for dirty media & clogging type applications. It is independent of direction of rotation, torque transmission from retainer shell to dynamic ring is done through drive lugs and all components are held together by a snap ring which helps in easier installation & removal. As all parts are Interchangeable, one can convert this series LPS-061-U/LPS-071-B to LPS-065-U/LPS-075-B by changing only the dynamic ring and the secondary seal, this principle is ideal for stock rationalization, this seals are comfortable to use in wide range of application as below:

Material of Construction:

Seal Faces: (Dynamic & Stationary Ring)

Carbon, Ceramic (99.5%), Silicon Carbide, Tungsten Carbide & which are suitable for fluid

Secondary Seal:

LPS-061-U: Viton, EPDM, Silicon, Aflas, EPR, Kalrez, TCV

LPS-065-U: GFT, PTFE, FEP, Grafoil

Hardware & Spring:

SS 316, SS 304, Hastelloy – C, Monel, Alloy -20


  • Dirty media
  • Petrochemicals
  • Petroleum refineries
  • Light hydrocarbons
  • General chemicals

Seal Characteristics:

  • Unbalanced / Balanced
  • Single acting
  • Inside mounted
  • Independent of direction of rotation

Operating Parameter:

  • Shaft diameter : 19 mm to 100 mm (0.75” to 4.0”)
  • Pressure : Up to 10 bar (kg/cm²)
  • Temperature : -60°C to 260°C
  • Shaft Speed : Up to 3000 RPM

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