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Mechanical Seals for Pumps

Product Description

  • Balanced
  • Dual seals in tandem as well as back-to-back
    arrangements also available
  • Independent of direction of rotation
  • Single seal
  • Stationary springs


Item Description 
1.1 Seal Face
1.2 O-Ring
1.3 Retainer
1.4 Spring
1.5 O-Ring
2 Seat
3 O-Ring
4 Drive Collar
5 O-Ring
6 Set screw

Technical Features

  • Adjusts to shaft movements because of the
    stationary design
  • Balanced seal even with plain shafts
  • No damage of the shaft by a dynamically
    loaded O-Ring
  • Operation in vacuum without additional seat
    locking possible
  • Safe operation
  • Small installation sizes
  • Spring unit isolated from the product so no
    sticking and clogging of the springs
  • Suitable for pressure reversals
  • Suitable for solid containing and abrasive

Typical Industrial Applications

  • Chemical industry
  • Dirty, abrasive and solid containing media
  • Fugitive hydrocarbons
  • Refining technology
  • Sticky and stringy media
  • Water and waste water technology
  • Chemical standard pumps
  • Sewage pumps


EN 12756


Seal face: Carbon graphite resin
impregnated (B), Silicon carbide (Q1)
Seat: Silicon carbide (Q1)
Secondary seals: FKM (V), NBR (P), FFKM
(K), PTFE (T)
Springs: Hastelloy® C-4 (M)
Metal parts: CrNiMo steel (G)

Performance Capabilities

Sizes: d = Upto 100 mm (Upto 4.000’’)
Pressure: p1*) = 25 bar (363 PSI)
Temperature: t = -40 °C .. +220 °C (-40 °F .. 428 °F)
Speed = 20 m/s (66 ft/s)
Permissible axial movement: ± 1.0 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