Manufacturer: Eagle Industry Co., Ltd.
Model: MA390/MA391

Features

• Cartridge
• Balanced
• Independent of direction of rotation
• Stationary multiple springs
• Springs and pin located on the atmospheric side

Specification

Standards and approvals

• EN 12756
  ISO 3096

Materials

• Seal face (MA290, MA390): High density
  carbon graphite
  Seal face (MA291, MA391): Silicon carbide (Q1)
  Seat (MA290/291, MA390/391): Silicon carbide (Q1)
  Metal parts: CrNiMo steel 316 (G)
  Secondary seals: FKM (V)

Operating range

• MA290 / MA390:
  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: 0.3wt. %
• MA291 / MA391:
  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 wt.%

Product variants

• MA390 (MA391)
  Axially downsized type of MA290 (MA291).