Alternative to:
Burgmann MG1/12/13/S20, AESB02/B012/B013, Roten L3/L3K/L3N, Flowserve 190/192/193, Latty T700
Features
• For plain shafts
• Single and dual seal
• Elastomer bellows rotating
• Unbalanced
• Independent of direction of rotation
• No torsion on bellows
Advantages
• Shaft protection over entire seal length
• Protection of seal face during installation due to
special bellows design
• Insensitive to shaft deflections due to large axial
movement ability
• Universal application opportunities
• Important material certifications available
• High flexibility due to wide offer on materials
• Suitable for low-end sterile applications
• Special design for hot water pumps (RMG12) available
• Dimension adaptions and additional seats available
Operating range (see note on page 1)
Shaft diameter: d1 = 10 … 100 mm (0.39" … 3.94")
Pressure: p1 = 16 bar (230 PSI),
vacuum … 0,5 bar (7.25 PSI), up to 1 bar (14.5 PSI)
with seat locking
Temperature: t = -20 °C … +140 °C (-4 °F … +284 °F)
Sliding velocity: vg = 10 m/s (33 ft/s)
Axial movement: ±2.0 mm
Recommended applications
• Process industry
• Chemical industry
• Pulp and paper industry
• Water and waste water technology
• Food and beverage industry
• Sugar industry
• Oil applications
• Water, waste water, slurries (up to 5 % by weight)
• Pulp (up to 4 % otro)
• Latex
• Dairies, beverages
• Sulfide slurries
• Chemicals
• Oils
• Chemical standard pumps
• Helical screw pumps
• Stock pumps
• Circulating pumps
• Submersible pumps
• Water and waste water pumps
Materials
Seal face: Carbon graphite antimony impregnated (A),
Carbon graphite resin impregnated (B), Silicon carbide (Q1),
Tungsten carbide (U3)
Seat: Silicon carbide (Q1, Q2), Tungsten carbide (U3),
Special cast CrMo steel (S), Aluminium oxide (V)
Elastomer: NBR (P), EPDM (E), FKM (V), HNBR (X4)
Metal parts: CrNiMo steel (G), Hastelloy® C-4 (M)
Standards and approvals
• Various material approvals e.g. FDA, WRAS, KTW, ACS,
W270, available (depending on type and material
combinations). Please inquire!
• EN 12756 (MG12, MG13)
Product variants

MG12
Dimensions, items and designations same as for MG1,
but with an extended bellows tail to achieve the fitting
length I1k according to EN 12756 in combination with
seat G6 or G60 (da exceeds EN 12756).
MG1S20
Dimensions, items and designations same as for MG1,
but with an extended bellows tail to achieve the special
fitting length I1S in combination with seat G50.

MG13
Dimensions, items and designations same as for MG1,
but with an extended bellows tail to achieve the fitting
length I1N according to EN 12756 in combination with
seat G6 or G60 (da exceeds EN 12756).
RMG12
Identical to MG12, but with a special bellows surface on
the shaft side. For use in hot water pumps up to 120 °C
(248 °F) and 25 bar (363 ft/s) or 140 °C (284 °F)
and 16 bar (232 PSI). Only in combination with seat
G606 (d1 = 12 … 38 mm) (0.47" … 1.50").
Seal face: Tungsten Carbide (U3)
Seat G606: Carbon graphite resin impregnated (B)