H7N Burgmann mechanical seals

H7N

Features

  • For stepped shafts
  • Single seal
  • Balanced
  • Super-Sinus-spring or multiple springs rotating
  • Independent of direction of rotation
  • Integrated pumping device available (H7F, H75F)
  • Variant with seat cooling available (H75G115)

Advantages

  • Universal application opportunities (standardization)
  • Efficient stock keeping due to easily interchangeable faces
  • Extended selection of materials
  • Flexibility in torque transmissions
  • Self cleaning effect
  • Short Installation length possible (G16)

Operating range

Shaft diameter:
d1 = 14 … 100 mm (0.55″ … 3.94″)
(Single spring: d1 = max. 100 mm (3.94″))
Pressure:
p1 = 80 bar (1,160 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)
Sliding velocity: vg = 20 m/s (66 ft/s)
Axial movement:
1.d1 up to 22 mm: ± 1.0 mm
2.d1 24 up to 58 mm: ± 1.5 mm
3.d1 from 60 mm: ± 2.0 mm

H7N Materials

Seal face: Silicon carbide (Q1, Q2), Carbon graphite antimony impregnated (A),also Aluminium oxide (V), CrMo cast 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

Standards and approvals

  • EN 12756

 

Download catalog for more information:H7N