H74-D Mechanical seals for pumps
Additional information
| 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), |
| SPRINGS | CrNiMo steel (G) |
| METAL PARTS | CrNiMo steel (G), Duplex (G1) |
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Description
Description
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″)) (G16)
Operating range
Shaft diameter:
d1 = 14 … 200 mm (0.55″ … 7.87″)
Pressure:
p1 = 80 bar (1,160 PSI) for d1 = 14 … 100mm,
p1 = 25 bar (363 PSI) for d1 = 100 … 200mm,
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
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
- Toxic and hazardous media
- Media with poor lubrication properties
- Adhesives
- Chemical standard pumps
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