Item Part no.
to DIN 24250
Description
1.1 472/481 Seal face
with bellows unit
1.2 410 Sealing ring
1.3 474 Drive collar
1.4 Socket head screw
1.5 904 Set screw
2 475 Seat
3 412 Sealing ring

MFLWT

Features

  • For unstepped shafts
  • Single Seal
  • Balanced
  • Independent of direction of rotation
  • Metal bellows rotating

Advantages

  • For extreme high 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).

Operating range

Shaft diameter:
d1 = 16 ... 150 mm (0.63" … 6“)
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 (73 PSI)
p1 <400 °C (752 °F) 3 bar (44 PSI)
Stationary seat lock necessary
Temperature:
t = -40 °C … +400 °C
(-148 °F … +752 °F)
Sliding velocity: vg = 20 m/s (66 ft/s)

Materials

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), Carpenter® 42 (T4), Hastelloy® C-4 (M)



Product variants

MFLWT90
Shaft diameter:
d1 = 16 … 150 mm (0.64" … 6")
Internally pressurized:
p1 = … 16 bar (232 PSI)
Externally pressurized:
p1 = 10 bar (145 PSI)
Temperature:
t = -20 °C ... +400 °C
(-4 °F ... +752 °F),
stationary seat lock necessary.
Sliding velocity: vg = 20 m/s (66 ft/s)