Mechanical Seals B740-D

Mechanical Seal for stepped shafts, rotating spring

  • Double Seal
  • Balanced
  • Multiple springs
  • Independent of direction of rotation

Double seals of the B740-D series have the same design-features as the "B700N" family of single seals.

Operating Range

d1 = 14 ... 200 mm 0.55" ... 8"
p1 = 25 (40) bar 360 (580) PSI
t = - 50 ... 220°C *) - 58°F ... 430°F
(- 20 ... 180°C *) - 4°F ... 355°F
vg = 20 m/s (10 m/s *) 66 (33) ft/s

Details

Item  Part No - DIN 24250 Description
1.1 472.1 Seal face 
1.2 472.2 Seal face 
1.3 474 Thrust ring 
1.4 485 Drive collar 
1.5 477 Spring 
1.6 904 Set screw 
1.7 412.1 O-Ring 
1.8 412.2 O-Ring 
2 475.1 Seat (G9) 
3 412.3 O-Ring 
4 475.2 Seat (G9) 
5 412.4 O-Ring 

B740-D
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