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AS-LY9DSTT: Burgmann LY9DSTT replacement

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AS-LY9DSTT: Replacement of Burgmann LY9DSTT mechanical seal cartridge seal

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Structure description
Replacement of Burgmann LY9DSTT
API 682 Category 2 and 3, Type C,
Arrangement 3 seal
Dual seal in face-to-face arrangement
Balanced
Cartridge unit
Rotating metal bellows
Shrink fitted seal ring and solid mating ring
Operating range
Pressure single ply bellows: p = vacuum ... 20 bar (... 290 PSI)
Pressure double ply bellows: p = vacuum ... 35 bar (... 508 PSI)
Temperature: t = -200 °C ... +400 °C(-328 °F ... +752 °F)
Sliding velocity: vg ... 50 m/s (... 164 ft/s)
Viscosity: ... 1,000 mPas
Solids content: ... 0.5 wt.%
Materials
Seal ring: Blister resistant carbon,Silicon carbide SSiC (Q1), RBSiC (Q2)
Mating ring:Silicon carbide SSiC (Q1), RBSiC (Q2)
Bellows: Inconel® 718 (M6)
Secondary seals: Graphite (G)
Metal parts: CrNiMo steel 316 (G), Carpenter® 42 (T4)
Recommended applications
Refining technology
Oil and gas industry
Petrochemical industry
Chemical industry
Power plant technology
LPG plants
API 610 / ISO 13709 pumps
Process pumps
Advantages
Very compact design
Suitable for higher speeds
Good followability due to no influence from run-out, squareness or vibration of the shaft
Low heat generation and power consumption due to narrow seal face width
Longer seal life
Also available in double ply design
Suited for applications with extreme high and low temperatures
Absence of dynamic O-Ring eleminates/ reduces seal face hang-up
Bellows design minimizes variation in face load due to shaft expansion or face wear
Resistant to abrasive particles in the medium, no shaft or sleeve fretting

AS-LY9DSTT Dimentions(mm)
API/d1 API/d2 API/d3 d5 l1 l2 l3 l4
20 70 105 - - - - -
30 80 115 138 145 98 47 73
40 90 125 148 151 97 54 73.5
50 100 140 168 149 107 42 84
60 120 160 188 162 107 55 80
70 130 170 198 169 107 62 81,5
80 140 180 208 162 107 55 79
90 160 205 238 180 117 63 88.5
100 170 215 248 184 117 67 85
110 180 225 258 189 117 72 83.5

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