Features mechanical seal h74-d
- 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 mechanical seal h74-d
- 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″))
Operating range mechanical seal h74-d
- Shaft diameter:
d1 = 14 … 200 mm (0.55″ … 7.87″) - 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 100 mm: ± 0.5 mm
d1 from 100 mm: ± 2.0 mm
Materials mechanical seal h74-d
- 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
| 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 |
Recommended applications seal h74-d
- 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
