Mechanical Seals SB

Mechanical Seal for Boiler Feed & Booster Pumps

  • Cartridge unit
  • Oil-lubricated
  • Bi-directional

Mechanical Seals of the SB-range were developed for use in thermal power stations and for pumps in oil production and transport processes.

In the power station applications the seals are operated with an external cooling. For an optimum circulation they are fitted with a pumping device. In the oil sector the SB-seals are applied in booster pumps for pipelines, in injection and process pumps. The more or less standardized inside components are adapted to the respective pumps by means of special adapters.

Operating Range

Shaft diameter: d1* = 40 ... 250 mm (1.57" ... 9.84")
Pressure: p1 = 50 bar (725 PSI)
Temperature: t = 300 °C (572 °F)
Sliding velocity: vg = 60 m/s (197 ft/s)
Axial movement: ±3 mm

* Other sizes on request


Item Description 
1.1.1 Seal face
1.1.3 Spring
1.2 Seat
2 Shaft sleeve
6 Cover
9 Assemble fixture
14 Shrink disk


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