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Standard Cartridge Seals
MA390 / MA391

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

Product specification example

<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).

※Applicable ranges shown in the product introduction are limit values for each standard material.
Applicable ranges, performance data and figures can serve only as a guide for selection and therefore in actual use there will be some cases where general specifications cannot be applied due to unknown factors or constraints. Please check the applicability before use.
The contents are subject to change without notice for improvement.

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Product name:Standard Cartridge Seals
MA390 / MA391

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