H74-D
H74-D
| Item | Part no. to 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 |
1) d1 > 100 mm: 2 mm x 30°
2) d1 > 100 mm: 30°
3) d1 > 100 mm: H7
4) d1 > 100 mm: +0.1
H74-D
Features
- For stepped shafts
- Dual seal
- Balanced
- Rotating multiple springs
- Independent of direction of rotation
- Seal concept based on the H7 range
- Variant with pumping screw available (H74F-D)
Advantages
- Efficient stock keeping due to easily interchangeable faces
- Extended selection of materials
- Flexibility in torque transmissions
- Insensitive to low solids contents
- EN 12756 (For connection dimensions d1 up to 100 mm (3.94"))
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
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
- Process industry
- Oil and gas industry
- Refining technology
- Petrochemical industry
- Chemical industry
- Power plant technology
- Pulp and paper industry
- Low solids content and low abrasive media
- Toxic and hazardous media
- Media with poor lubrication properties
- Adhesives
- Chemical standard pumps
Product variants
H74F-D
Dimensions, items and descriptions as for H74-D, but with pumping screw.
Dependent on direction of rotation.
Dimensions, items and descriptions as for H74-D, but with pumping screw.
Dependent on direction of rotation.
Similar products
AX25
- External configuration
- Balanced
- Independent of direction of rotation
- Independent of pressure direction
AX25D
- Dual seal
- Balanced
- Independent of direction of rotation
- Independent of pressure direction
AX30
- Unbalanced
- Dependent on direction of rotation
- Solid seats