Conical Spring Unbalanced Mechanical Seals


LPS-011-U series is single conical spring unbalanced mechanical seal with “O” ring as secondary sealing offered for wide service applications. These seals designed are dependent of the direction of rotation, torque transmission is done by single conical spring and direction of rotation is seen from the drive end of the shaft. Clockwise rotating shaft required right handed spring & Anti-Clockwise rotating shaft required left handed spring, 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, Stainless Steel & which are suitable for fluid
Secondary Seal:, Silicon, Aflas, Kalrez, PTFE, GFT , TCV

Hardware & Spring:

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


  • Water pumps
  • Chemical process pumps
  • Sewage & submersible pumps
  • Circulation pumps for central heating

Seal Characteristics:

  • Unbalanced
  • Single acting
  • Inside mounted
  • Dependent of direction of rotation

Operating Parameter:

  • Shaft diameter : 19 mm to 100 mm (0.75” to 4.0”)
  • Pressure : Up to10 bar (kg/cm²)
  • Temperature : -25°C to 200°C
  • Shaft Speed : Up to 3000 RPM

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