MD251

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MD251

MD251
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Item Description
1, 11 Seal face
2, 8, 10, 12, 16, 19 O-Ring
3 Spacer
4 Thrust ring
5 Collar
6, 13 Spring
7, 14, 21, 22, 24 Pin
9, 15 Seat
17 Gasket
18 Seal cover
20 Shaft sleeve
23 Drive collar
25 Set screw
26 Assembly fixture
27 HSH cap screw

MD251

Features

  • Cartridge design
  • Balanced
  • Double seal
  • Independent of direction of rotation
  • Springs do not contact the liquid
  • Inboard seal can withstand both forward and back pressure

Advantages

  • Equipped with flushing, quenching, and drainports as standard
  • PTFE backup ring as standard

Operating range

Pressure: p = vacuum … 16 bar (232 PSI)
Temperature:
t = -20 °C … 160 °C (-4 °F … 320 °F) (oil),
0 °C … 80 °C (32 °F … 176 °F) (water)
Sliding velocity: vg = 20 m/s (66 ft/s)
Viscosity: … 1 Pa·s
Solids content: … 7 %

Materials

Seal face (inboard side): Silicon carbide (Q1)
Seal face (atmosphere side): High density carbon graphite
Seat: Silicon carbide (Q1)
Metal parts: CrNiMo steel (G)
Secondary seals: FKM (V)

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The Eagleburgmann Group

Sealing technology for plants and machines

EagleBurgmann is one of the worldwide leading providers of industrial sealing technology. Mechanical seals, seal supply systems, magnetic couplings, carbon floating ring seals, expansion joints, gaskets and packings as well as comprehensive services are used wherever reliability and safety are needed.

Mechanical seals and more

Sealing technology by EagleBurgmann is used worldwide in oil and gas industries, refineries, the petrochemical, chemical, and pharmaceutical industries, food processing, energy, water, mining, paper, aerospace, and other industries. Close to 5,800 employees provide their ideas, solutions, and commitment so that customers can rely on our sealing technology.

What makes us stand out is our excellent quality, great innovative capacity, and an extensive product portfolio for nearly all industrial processes and fields of application. Our product portfolio includes everything from mechanical seals and seal supply systems to magnetic couplings, carbon floating ring seals, expansion joints, and gaskets and packings as well as comprehensive services. Since we are part of the German Freudenberg and Japanese EKK group, we have all the necessary resources for a firmly based reliable partnership.

EagleBurgmann WORLDWIDE