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B740-D
Standard Mechanical Seals

Product Description

  • Balanced
  • Dual seal
  • For stepped shafts
  • Independent of direction of rotation
  • Rotating multiple springs
  • Seal concept based on the B700 range
  • Variant with pumping screw available
    (B740F-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 possible
  • Suitable for media with low solids contents
  • EN 12756 (For connection dimensions d1 upto
    100 mm)

Typical Industrial Applications

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

Standards

EN 12756

Materials

Seal face: Silicon carbide (Q1, Q2), Carbon graphite
antimony impregnated (A),
Aluminium oxide (V), Special cast CrMo steel (S)
Seat G9: Carbon graphite antimony impregnated (A),
Carbon graphite resin impregnated (B), Silicon carbide
(Q1*, Q2*)
Secondary seals: EPDM (E), NBR (P), FKM
(V), FFKM (K)
Springs: CrNiMo steel (G)
Metal parts: CrNiMo steel (G), Duplex (G1)
* Cannot be combined with seal face made of S

Performance Capabilities

Sizes: d1 = Upto 200 mm (Upto 7.875’’)
Pressure:
p1 = 80 bar (1160 PSI) for d1 = 14 ... 100 mm,
p1 = 25 bar (363 PSI) for d1 = 100 ... 200 mm,
p1 = 16 bar (232 PSI) for d1 > 200 mm
Temperature: t = -50 °C ... 220 °C (-58 °F … 428 °F)
Speed = 20 m/s (66 ft/s)
Permissible axial movement:
d1 up to 100 mm: ± 0.5 mm
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