The MFL85N, 680, Chestertion 886, Latty B17 sealing concept with rolled metal bellows seal can achieve a good service life of more than 2 years even though the application requirements are very high. This means an increase of a factor of 50 and a significant reduction in maintenance. Therefore, the maintenance cost of relevant pumps can be reduced by about 90%. Mf95n with rolled metal bellows could be selected because this type of seal is very robust and is also combined with a high viscosity. In addition, the metal bellows take over the function of dynamic loading O-ring, so the seal is less sensitive to sediment. We recommended to industries below:
Water and waste water technology
Pulp and paper industry
Media with low solids content
Pressure oils for bio diesel fuels
Multi-stage pumps (non-drive side)
Water and waste water pumps
Metal Bellow Seals MFL85N, 680, Chestertion 886, Latty B17
•For unstepped shafts
•Independent of direction of rotation
•For extreme temperature ranges
•No dynamically loaded O-Ring
•Self cleaning effect
•Short installation length possible
•Pumping screw for highly viscous media available (dependant on direction of rotation).
Shaft diameter: d1 = 16 … 100 mm (0.64" … 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)
Seal face: Carbon graphite antimony impregnated (A), Silicon carbide (Q12)
Seat: Silicon carbide (Q1)
Bellows: Inconel® 718 hardened (M6), Hastelloy® C-276 (M5)
Metal parts: CrNiMo steel (G), Duplex (G1), Hastelloy® C-4 (M)
•Oil and gas industry
•Highly viscous media
•Special rotating equipment
Shaft diameter: d1 = 20 … 100 mm (0.79" … 4") Internally pressurized: p1 = … 16 bar (232 PSI), stationary seat lock necessary.
Externally pressurized: p1 = 10 bar (145 PSI)
Temperature: t = –40 °C … +220 °C (–40 °F … +428 °F)
Sliding velocity: vg = 20 m/s (66 ft/s)
MFL85P / MFL90P
Version with pumping ring. Dependent on direction of rotation. Can be retrofitted.
Dimensions, items and description as for MFL85N, but with pumping screw (item no. 1.4).
Dependent on direction of rotation! The pumping screw can be retrofitted.