M74-D Burgmann mechanical seals

M74-D

Features

For plain shafts
Dual seal
Unbalanced
Rotating multiple springs
Independent of direction of rotation
Seal concept based on the M7 range
Variant with pumping screw available (M74F-D)

Advantages

Efficient stock keeping due to easily interchangeable faces
Extended selection of materials
Flexibility in torque transmissions
EN 12756 (For connection dimensions d₁ up to 100 mm (3.94″))

Operating range(M74-D)

Shaft diameter:
d1 = 18 … 200 mm (0.71″ … 7.87″)
Pressure:
p1 = 25 bar (363 PSI)
Temperature:
t = -50 °C … 220 °C
(-58 °F … 428 °F)
Sliding velocity:
vg = 20 m/s (66 ft/s)
Axial movement:
d1 up to 100 mm: ±0.5 mm
d1 from 100 mm: ±2.0 mm

M74-D Materials

Seal face: Silicon carbide (Q1)
Seat G9: Carbon graphite antimony impregnated (A), Carbon graphite resin impregnated (B), Silicon carbide (Q1)
Seat G4, G6 (Q1, Q2), Seat G13 (A, B)Secondary seals: EPDM (E), FKM (V), FFKM (K)
Springs: CrNiMo steel (G)
Metal parts: CrNiMo steel (G), Duplex (G1)

Standards and approvals

EN 12756

Recommended applications

Chemical industry
Process industry
Pulp and paper industry

Low solids content and low abrasive media
Toxic and hazardous media
Media with poor lubrication properties
Adhesives

Chemical standard pumps

Download catalog for more information:M74 D

M74-D Burgmann mechanical seals

M74-D

Features

Advantages

Operating range(M74-D)

M74-D Materials

Standards and approvals

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