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SS-LL9DJUE: Burgmann LL9DJUE replacement

Description:
SS-LL9DJUE: Replacement of Burgmann LL9DJUE mechanical seal

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Features
Equivalent to Burgmann LL9DJUE
API 682 Category 2 and 3, Type A,
Arrangement 2 seal
Dual seal in face-to-back arrangement
Dry contact outer seal (containment seal)
Balanced
Cartridge unit
Stationary multiple springs
Solid seal faces

Operating range
Pressure (primary seal): p = vacuum ... 60 bar (870 PSI)
Pressure (secondary seal): p = 2.75 bar (40 PSI) normal operation,max. 60 bar (870 PSI) in wet operation
Temperature: -40 °C … +176 °C (-40 °F … +349 °F)*
Sliding velocity: ... 25 m/s (82 ft/s)
Viscosity: 300 mPas
Solids content: ... 0.5 wt.%
* Engineered up to 260 °C (500 °F) with FFKM (K) secondary seals

Materials
Seal ring (primary seal): Blister resistant carbon,Silicon carbide SSiC (Q1), RBSiC (Q2)
Seal ring (secondary seal): Special carbon
Mating ring:Silicon carbide SSiC (Q1), RBSiC (Q2)
Secondary seals:FKM (V), FFKM (K), EPDM (E), NBR (P)
Springs: Hastelloy® C-276 (M5)
Metal parts: CrNiMo steel 316 (G)

Recommended applications
Refining technology)
Oil and gas industry
Petrochemical industry
Chemical industry
Power plant technology
Light volatile hydrocarbons
LPG plants
API 610 / ISO 13709 pumps
Process pumps

Advantages
Outer seal which can be used for flashing as well as non-flashing applications prevents hazardous emissions in case of inboard seal failure
Low heat generation and power consumption due to narrow seal face width of inner seal
Longer seal life
Good followability due to no influence from run-out, squareness or vibration of the shaft
Pressure-balanced design prevents mating ring being forced out under reverse pressure
No damage to shaft sleeve as dynamic
O-Ring is not in direct contact with the sleeve


SS-LL9DJUE Dimentions(mm)
API/d1 API/d2 API/d3 d5 d6 l4 l5 l6 l7
20 70 105 51 128 128 98 30 80
30 80 115 63 138 130 98 32 80
40 90 125 74 148 133 98 35 80
50 100 140 84 168 142 107 35 87
60 120 160 99 188 142 107 35 87
70 130 170 108 198 142 107 35 87
80 140 180 120 208 142 107 35 87
90 160 205 138 238 150 115 35 93
100 170 215 148 248 150 115 35 93
110 180 225 157 258 155 115 40 93