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Mechanical Seals for Pumps

Product Description

  • Balanced
  • Cartridge design
  • Dependent of direction of rotation
  • Integrated pumping device
  • Multiple springs
  • Shrink-fitted seal face
  • Single seal
  • Stationary spring loaded unit


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

Technical Features

  • Suitable for high sliding velocities and medium
    Accommodates shaft deflections due to
    stationary design
  • Cost effective due to standardized inner
  • High flexibility due to adaptation of the
    connection parts to the pump seal chamber
  • Optimum heat dissipation due to integrated
    pumping device and optimized seat design
  • Pre-assembled unit for quick and easy
  • Versatile application for OEM or retrofits of
    boiler feed water pumps

Typical Industrial Applications

  • Boiler feed water pumps
  • Power plant technology


Seal face: Silicon carbide (Q), Carbon
graphite antimony impregnated (A), Carbon
graphite resin impregnated (B)
Seat: Silicon carbide
Secondary seals: EPDM (E), FFKM (K)
Springs: CrNiMo steel (G)
Metal parts: CrNiMo steel (G)

Performance Capabilities

Sizes: d1* = Upto 250 mm (Upto 10.000’’)
Pressure: p1 = 50 bar (725 PSI)
Temperature: t = 300 °C (572 °F)
Speed = 60 m/s (197 ft/s)
Permissible axial movement: ±3 mm


Standard Cartridge Seals

Mechanical Seals As Per API 682

Split Seals

Engineered Seals For Demanding Applications

Standard Mechanical Seals For Pumps & Compressors

Mechanical Seals For Agitators, Mixers, Kneaders & Reactors

Supply Systems & Components

API 682 / ISO 21049

Technical Information