H7N
Back to overview

H7N

Request product
H7N
H7N
Request product
Technical drawing of H7N

Click image to enlarge

Item Part no. toDIN 24250 Description
1.1 472 Seal face
1.2 485 Drive collar
1.3 474 Thrust ring
1.4 412.1 O-Ring
1.5 477 Spring
1.6 904 Set screw
2 475 Seat (G9)
3 412.2 O-Ring

1) d1 > 100 mm: 2 mm x 30°
2) d1 > 100 mm: 30°
3) d1 > 100 mm: +0.1
4) d1 > 100 mm: H7

H7N

PDF data sheet

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:
d1 up to 22 mm: ± 1.0 mm
d1 24 up to 58 mm: ± 1.5 mm
d1 from 60 mm: ± 2.0 mm

Materials

Seal face: Silicon carbide (Q1, Q2), Carbon graphite antimony impregnated (A), 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

Recommended applications

  • Hot water applications
  • Light hydrocarbons
  • Process industry
  • Oil and gas industry
  • Refining technology
  • Petrochemical industry
  • Chemical industry
  • Power plant technology
  • Pulp and paper industry
  • Food and beverage industry
  • Boiler feed pumps
  • Process pumps

Product variants

https://media-assets.eagleburgmann.com/image/108134910297/image_5dqml8rt8l1qbfvmagatt8q62v/-FWEBP

H75
Shaft diameter: d1 = 28 ... 200 mm (1.10" ... 7.87")
As H7N, but with multiple springs in sleeves (Item no. 1.5)
Axial movement: ± 2 ... 4 mm, dependent on diameter.

https://media-assets.eagleburgmann.com/image/108134910297/image_7outrtl8al51391tca1rfk1u7s/-FWEBP

H7F
Shaft diameter: d1 = max. 100 mm (3.94")
Dimensions, items and descriptions as for H7N, but with single spring and pumping screw.
Dependent on direction of rotation. (Viscosity ≤ ISO VG10).

H75F\n
Shaft diameter: d1 = 28 ... 200 mm (1.10" ... 7.87")
Dimensions, items and descriptions as for H7N, but with single spring and pumping screw.
Dependent on direction of rotation. (Viscosity ≤ ISO VG10).

https://media-assets.eagleburgmann.com/image/108134910297/image_e91cd1hld54lt8i9gtkbjtnm73/-FWEBP

H76\n
Shaft diameter: d1 = 14 ... 100 mm (0.55" ... 3.94")
Dimensions, items and description as for H7N, but with special single spring (Item no. 1.5) for compensating large axial movements (± 4 mm).

Similar products

AX25

AX25

  • External configuration
  • Balanced
  • Independent of direction of rotation
  • Independent of pressure direction
AX40K

AX40K

  • Stationary springs
  • Balanced
  • Independent of direction of rotation
  • Independent of pressure direction
BT-C5E

BT-C5E

  • Single seal
  • For plain shafts
  • Unbalanced
  • Multiple springs, rotating
  • Independent of direction of rotation
Back to overview