Cowseal

MG mechanical seal

Burgmann MG1 MG12 MG13 MGS20

The Burgmann MG1, MG12 and MG13 are robust, high-quality elastomer bellows mechanical seals designed for a wide range of industrial applications.

These unbalanced single seals feature a rotating bellows design that is independent of the direction of rotation. The special bellows design protects the seal faces during installation and provides a large axial movement capability to accommodate shaft deflections.

Mechancial seal drawing

drawing

Mechancial seal Chart

d1 d3 d7 d8 d7-1 l3 l2 l1 l4 l5 l6 l7 l8
10 22 21 19.2 24.6 6.5 6.5 9 10 14.7 25.5 26 33.5
12 24.5 23 21.6 27.8 6.5 6.5 9 10 14.7 25.5 26 33.5
14 24.5 23 21.6 27.8 6.5 6.5 9 10 14.7 25.5 28.5 33.5
16 28 27 24.6 30.9 6.5 6.5 10.5 10 17.2 25.5 28.5 33.5
18 28 27 24.6 30.9 7.5 7.5 10.5 10 17.2 25.5 30.1 37.7
20 31.5 30 34.15 34.15 7.5 7.5 10.5 11.4 21.7 25.5 30.1 37.7
22 31.5 30 34.15 34.15 7.5 7.5 10.5 11.4 21.7 25.5 32.7 42.7
24 34.5 33 40.5 40.5 7.5 7.5 10.5 11.4 21.7 25.5 32.7 42.7
26 34.5 33 40.5 40.5 7.5 7.5 10.5 11.4 21.7 25.5 32.7 42.7
28 37.5 36 46.5 46.5 7.5 7.5 10.5 11.4 21.7 25.5 35.2 42.7
30 37.5 36 46.5 46.5 7.5 7.5 10.5 11.4 21.7 25.5 35.2 42.7
32 40.5 39 48.4 48.4 7.5 7.5 10.5 11.4 21.7 25.5 35.2 42.7
35 40.5 39 48.4 48.4 7.5 7.5 10.5 11.4 21.7 25.5 35.2 42.7
38 43.5 42 50.8 50.8 7.5 7.5 10.5 11.4 21.7 25.5 35.2 47.7
40 43.5 42 50.8 50.8 9 9 10.8 12 14 30.2 33.5 36.2
42 43.5 42 50.8 50.8 9 9 10.8 12 14 30.2 41.5 36.2
45 48.5 48 55.3 55.3 9 9 10.8 12 14 30.2 41.5 36.2
48 48.5 48 55.3 55.3 9 9 10.8 12 14 30.2 41.5 36.2
50 51.5 50 57.15 57.15 9 9 10.8 12 14 30.2 41.5 36.2
53 51.5 50 57.15 57.15 9 9 10.8 12 14 30.2 41.5 36.2
55 54.5 54 61.5 61.5 9 9 10.8 12 14 30.2 41.5 36.2
58 54.5 54 61.5 61.5 9 9 10.8 12 14 30.2 41.5 36.2
60 57.5 57 63.8 63.8 9 9 10.8 12 14 30.2 41.5 36.2
63 57.5 57 63.8 63.8 9 9 10.8 12 14 30.2 41.5 36.2
65 60.5 60 66.7 66.7 9.5 9.5 11.5 13.5 14 30.7 41.5 38.2
68 60.5 60 66.7 66.7 9.5 9.5 11.5 13.5 14 30.7 41.5 38.2
70 63.5 63 69.85 69.85 9.5 9.5 11.5 13.5 14 30.7 41.5 38.2
75 63.5 63 69.85 69.85 9.5 9.5 11.5 13.5 14 30.7 41.5 38.2
80 66.5 66 72.3 72.3 9.5 9.5 11.5 13.5 15 32.2 41.5 41.7
85 66.5 66 72.3 72.3 11 11 13.5 13.5 15 32.2 41.5 41.7
90 69.5 69 75.4 75.4 11 11 13.5 13.5 15 32.2 41.5 41.7
95 69.5 69 75.4 75.4 11 11 13.5 13.5 15 32.2 41.5 41.7
100 72.5 72 78.4 78.4 11 11 13.5 13.5 15 32.2 41.5 41.7

Key features

  • Elastomer bellows rotating design
  • Unbalanced single seal, independent of rotation direction
  • No torsion transmitted to bellows
  • Shaft is protected over entire seal length
  • Special bellows design protects seal faces during installation
  • Large axial movement capability to handle shaft deflections
  • Suitable for sterile applications and hot water pumps (MG12)

Materials of construction

  • Rotary Face: Carbon, Silicon Carbide, Tungsten Carbide
  • Stationary Seat: Ceramic, Silicon Carbide, Tungsten Carbide
  • Elastomers: Nitrile, EPDM, FKM, FFKM
  • Metal Parts: Stainless Steel

Operating limits

  • Temperature: -20°C to 120°C (-4°F to 248°F)
  • Pressure: Vacuum to 1.2 MPa (174 psi)
  • Speed: ≤10 m/s (32.8 ft/s)

Applications

  • Chemical processing
  • Pulp & paper
  • Water & wastewater treatment
  • Food & beverage
  • Pharmaceutical
  • General industrial pumps, mixers, agitators

Interchangeability

  • MG1 interchangeable with Vulcan 20/10, 20H, 22
  • MG12 interchangeable with Burgmann RMG12
  • MG13 interchangeable with Burgmann H10

FAQs

MG1 and MG13 are essentially the same seal, while the MG12 is a variant of the MG1 with a longer bellows tail to meet the EN 12756 standard fitting length.

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