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AS-MA290/AS-MA390: Burgmann Cartridge seal MA290/MA390

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AS-MA290/AS-MA390: Cartridge mechanical seal replacement of Burgmann MA290/MA390

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AS-MA290/SS-MA390:Burgmann MA290/MA390 cartridge mechanical seal
Structure Description
Equivalent to Burgmann MA290/MA390
Cartridge
Balanced
Independent of direction of rotation
Stationary multiple springs
Springs and pin located on the atmospheric side
Operating range
SS-MA290 / SS-MA390:
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: 0.5 Pa·s
Solids content: 0.3 %
SSMA291 / SSMA391:
Pressure: p = … 10 bar (145 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 face (SS-MA290, SS-MA390): High density carbon graphite
Seal face (SS-MA291, SS-MA391): Silicon carbide (Q1)
Seat (SS-MA290/291, SS-MA390/391): Silicon carbide (Q1)
Metal parts: CrNiMo steel (G)
Secondary seals: FKM (V)
SS-MA390 (SS-MA391)
Axially downsized type of MA290 (MA291).

AS-MA290/SS-MA390 dimensions(mm)
d d1min d1max d2 d3 l1 l2 l3
20 30 51 58 104 42 60 12
24 34 51 58 104 42 60 12
25 35 51 58 104 42 60 12
28 38 54 63 108 42 65 12
30 40 56 63 108 42 65 12
32 42 56 63 108 42 65 12
33 43 66 73 118 42 75 14
35 45 66 73 118 42 75 14
38 48 66 73 118 42 75 14
40 50 66 73 118 42 75 14
43 53 71 78 128 42 80 14
45 55 71 78 128 42 80 14
48 58 81 88 138 44 90 14
50 60 81 88 138 44 90 14
53 63 81 88 138 44 90 14
55 65 81 88 138 44 90 14
58 68 96 103 164 46 105 18
60 70 96 103 164 46 105 18
63 73 96 103 164 46 105 18
65 75 96 103 164 46 105 18
70 80 102 109 178 46 111 18
75 85 114 121 193 49 123 18
80 90 114 121 193 49 123 18
85 95 124 131 208 49 133 20
90 100 124 131 208 49 133 20
95 105 134 141 218 49 143 20
100 110 134 141 218 49 143 20

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