WMFL85N Metal Bellow Mechanical Seals Replace Eagle Burgmann MFL85N
Features
For unstepped shafts
Single seal
Balanced
Independent of direction of rotation
Metal bellows rotating
Analogue for
Burgmann MFL85N, Chesterton 886, John Crane 680, Latty B17, LIDERING LMB85
Advantages
For extreme temperature ranges
No dynamically loaded O-Ring
Self-cleaning effect
Short installation length possible
Pumping screw for highly viscous media available (dependent on direction of rotation)
Recommended applications
Process industry
Oil and gas industry
Refining technology
Petrochemical industry
Chemical industry
Hot media
Cold media
Highly viscous media
Pumps
Special rotating equipment
Oil
Light hydrocarbon
Aromatic Hydrocarbon
Organic solvents
Week acids
Ammonia
Operating range
Shaft diameter:
d1 = 16 … 100 mm (0.63″ … 4“)
Externally pressurized:
p1 = … 25 bar (363 PSI)
Internally pressurized:
p1 <120 °C (248 °F) 10 bar (145 PSI)
p1 <220 °C (428 °F) 5 bar (72 PSI)
Temperature: t = -40 °C … +220 °C
(-40 °F … 428) °F,
Stationary seat lock necessary.
Sliding velocity: vg = 20 m/s (66 ft/s)
Notes: The range of preesure,temperature and sliding velocity is depend on seals
Combination material
Rotary Face
Silicon carbide (RBSIC)
Carbon graphite resin impregnated
Tungsten carbide
Stationary Seat
Silicon carbide (RBSIC)
Tungsten carbide
Elastomer
Fluorocarbon-Rubber (Viton)
Ethylene-Propylene-Diene (EPDM)
PTFE Enwrap Viton
Bellows
Alloy C-276
Stainless Steel （SUS316)
AM350 Stainless Steel
Alloy 20
Parts
Stainless Steel (SUS304)
Stainless Steel (SUS316)
Mediums: Hot water, oil, liquid hydrocarbon, acid, alkali, solvents, paper pulp and other medium-and-low-viscosity content.
Item Part No. DIN 24250 Description
1.1 472/481 Seal face with bellows unit
1.2 412.1 O-Ring
1.3 904 Set screw
2 475 Seat (G9)
3 412.2 O-Ring
WMFL85N Dimension Data Sheet (mm)
