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Mechanical Seals for Pumps

Product Description

  • Balanced
  • Cartridge design
  • Dual seal
  • Integrated pumping device
  • Multiple springs arrangement
  • Shrink-fitted seal face
  • Single robust stationary seat
  • Stationary spring loaded unit


Item Description 
1.1.1 Seal face
1.1.3 Spring
1.2 Seat
2 Shaft sleeve
4 Clamping sleeve
6 Housing
8 Cover
10 Pumping sleeve
12 Assemble fixture
14 Shrink disk

Technical Features

  • 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
  • Reliable operation due to single robust seat
    with bandage
  • Suitable for high sliding velocities and medium
  • Suitable for use in compliance with API 682,
    type ES
  • Versatile application for OEM or retrofits of
    boiler feed water pumps
  • Version with loose-fitted seal face available, for
    extreme applications

Typical Industrial Applications

  • Chemical industry
  • Crude oil
  • Crude oil feed pumps
  • Injection pumps
  • Multi-phase pumps
  • Oil and gas industry
  • Process water
  • Refining technology
  • Volatile and non-volatile hydrocarbons


API 682 / ISO 21049


Seal face: SiC-C-Si, silicon impregnated
carbon (Q3), Carbon graphite antimony impregnated (A)
Seat: Silicon carbide (Q)
Secondary seals: FKM (V), EPDM (E),
Springs: Hastelloy® C-4 (M)
Metal parts: CrNiMo steel (G), Duplex (G1),
Super Duplex (G4), Pure Titanium (T2),
Hastelloy® C-4 (M)

Performance Capabilities

Sizes: d1* = Upto 250 mm (Upto 10.000’’)
Pressure: p3 = 150 bar (2,175 PSI)
Temperature: t = 200 °C (392 °F)
Speed = 60 m/s (197 ft/s)

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
Gas Lubricated Seals for Pumps & Agitators
API 682 / ISO 21049
Technical Information