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TG680

TG680

EagleBurgmann MFL WT80 Series Replacement
TG680 Seres mechanical seal featurng welded metal
bellowsstatic seal,The bellows adopts advanced
welding technology.45°C wave design, which makes
the stress distribution morereasonable and
flexibility, to ensure seals has advantages of
reliable sealing and good matching property. The
Type 680incorporates drive lugs under the bellows
that provide addedrotational drve, This reduces
torsional stress on the bellowsand makes the Type
680 the ideal seal for maximum reliability and
and extended life in viscous or high-temperature
applications.The seal has excellent dynamic
performance and has a wide
range of applications.
Detail Information
Features
  Drive lugs
  Welded metal bellows
  Bi-dire ctional
  Balanced
  Flexible graphite auxiliary seal
  Available with DOUBLE-PLY Bellows
  TG680 seal, equivalent to Type MFL WT80
Recommended Applications
Refining technology, Oil and gas industry
Extreme ranges of temperature and high-viscosity media 
Pumps
Special Rotating Equipment.
Operating range
Shaft diameter:  d1=16...100mm
Pressure: p=0...2.5Mpa(362.5psi)
Temperature:  t = -75 °C ...400 °C(-103°F to 752°F)-TG680M
                       t = -40 °C ...290 °C(-40°F to 554°F)-TG680C
                       t = -20 °C ...200 °C(-4°F to 428°F)-TG680T
Sliding velocity:   Vg≤25m/s(or Vg≤5,000rpm(82ft/m)
Notes: The range of preesure,temperature and sliding velocity is depend on seals combination materials
Product Structure
Combination Materials
1.BELLOWS
    AM350  T8             Hastelloy C-276  M5                  inconel 718  M6
2.SEAL FACE
    Carbon graphite  A         Sintered Silicon  O1            Sintered Silicon    O1  
    antimony impreg                   Carbide SSlC                       Carbide SSIC
3.AUXILIARY SEAL
   Flexible Graphite  G             Flexible Graphite  G            Flexible Graphite  G
4.ROTARY HEAD
    All0y 42  T4                     Hastelloy C-276  M5                     All0y 42  T4
5.METAL PATRTS
    CrNiMo-steel  G             Hastelloy C-276  M5                        All0y 625  T3
6.APPLICATION
   Mildly corrosive medium      Corrosive medium            Corrosive medium
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