Features mechanical seal ma290 / ma291
- Cartridge
- Balanced
- Independent of direction of rotation
- Stationary multiple springs
- Springs and pin located on the atmospheric side
Advantages mechanical seal ma290 / ma291
- Extremely short length design –
the total length including the seal cover is less than 50 mm - Easy installing on the pumps without modifying the stuffing box
- Excellent followability due to no influence from run-out, squareness or vibration of the shaft
- Mounted outside the stuffing box for providing excellent air cooling performance
- Un-wetted springs and knock pins for protecting from lockout by liquid
Operating range seal ma290 / ma291
MA290:
- Pressure: p = … 20 bar (290 PSI)
- Temperature:
t = -20 °C …160 °C (-4 °F … 320 °F) (oil),
0 °C … 60 °C (32 °F … 140 °F) (water) - Sliding velocity:
vg = max. 20 m/s (66 ft/s) - Viscosity: 0.5 Pa·s
Solids content: 0.3 %
MA291:
- Pressure: p = … 16 bar (232 PSI)
- Temperature:
t = -20 °C …160 °C (-4 °F … 320 °F) (oil),
0 °C … 60 °C (32 °F … 140 °F) (water) - Sliding velocity: vg = max. 20 m/s (66 ft/s)
- Viscosity: 3 Pa·s
Solids content: 10 %
Materials seal ma290 / ma291
- Seal face (MA290): High density carbon graphite
- Seal face (MA291): Silicon carbide (Q1)
- Seat (MA290/291): Silicon carbide (Q1)
- Metal parts: CrNiMo steel (G)
- Secondary seals: FKM (V)
| Item | Description |
| 1 | Seal face |
| 2, 5, 7 | O-Ring |
| 3 | Spring |
| 4 | Seat |
| 6 | Drive collar |
| 8 | Set screw |
| 9 | Seal cover |
| 10 | Gasket |
| 11 | Assembly fixture |
| 12 | HSH cap screw |
Recommended applications seal ma290 / ma291
- Petrochemical industry
- Chemical industry
- Pharmaceutical industry
- Pulp and paper industry
- Water and waste water technology
- Food and beverage industry
- Universally applicable
- Centrifugal pumps
- Eccentric screw pumps
- Process pumps
