MA290-MA291 seal
MA290-MA291 seal

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
dimensions-mechanical-seal-ma290-ma291

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)
ItemDescription
1Seal face
2, 5, 7O-Ring
3Spring
4Seat
6Drive collar
8Set screw
9Seal cover
10Gasket
11Assembly fixture
12HSH 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