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U740-D
Standard Mechanical Seals

Product Description

  • Dual seal
  • For plain shafts
  • Independent of direction of rotation
  • Rotating multiple springs
  • Seal concept based on the U700 range
  • Unbalanced
  • Variant with pumping screw available
    (U740F-D)

Details

Item Description 
1.1 Seal face
1.2 Seal face
1.3 Thrust ring
1.4 Drive Collar
1.5 Spring
1.6 Set screw
1.7 O-Ring
1.8 O-Ring
2 Seat (G9)
3 O-Ring
4 Seat (G9)
5 O-Ring

Technical Features

  • Flexibility in torque transmissions
  • Pumping screw for media with higher viscosity
    also possible
  • Self cleaning effect
  • Short installation length also possible
  • Suitable for media with low solids contents
  • Versatile application possibilities
  • EN 12756 (For connection dimensions d1 upto
    100 mm )

Typical Industrial Applications

  • Adhesives
  • Chemical industry
  • Low solids content and low abrasive media
  • Media with poor lubrication properties
  • Process industry
  • Toxic and hazardous media
  • Chemical standard pumps

Standards

EN 12756

Materials

Seal face: Special cast CrMo steel (S),
Silicon carbide (Q1, Q2)
Seat G9: Carbon graphite antimony
impregnated (A), Carbon graphite resin
impregnated (B), Silicon carbide (Q1*, Q2*)
Seat G4: Silicon carbide (Q1*, Q2*)
Seat G6: Silicon carbide (Q1*, Q2*)
Seat G13: Carbon graphite antimony
impregnated (A), Carbon graphite resin impregnated (B)
* Cannot be combined with seal face made of S

Performance Capabilities

Sizes: d1 = Upto 200 mm (Upto 7.875’’)
Pressure: p1 = 25 bar (363 PSI)
Temperature: t = -50 °C ... 220 °C (-58 °F … 428 °F)
Speed = 20 m/s (66 ft/s)
Permissible axial movement:
d1 from 100 mm: ± 2.0 mm

U300N

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