MA250 / MA251

Request product

MA250 / MA251

MA250 / MA251
Request product
Item Description
1 Seal face
2, 7, 11 O-Ring
3 Spacer
4 Thrust ring
5 Spring
6 Seat
8 Gasket
9 Seal cover
10 Bushing
12 Shaft sleeve
13 Pin
14 Drive collar
15 Retaining ring
16 Set screw
17 Assembly fixture
18 HSH cap screw

MA250 / MA251

Features

  • Cartridge design
  • Balanced
  • Independent of direction of rotation
  • Stationary, inside mounted type
  • Springs do not contact the liquid

Advantages

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

Operating range

MA250:
Pressure: p = 0 … 16 bar (232 PSI)
Temperature:
t = -20 °C … 160 °C (-4 °F … 320 °F) (oil),
0 °C … 60 °C (32 °F … 140 °F) (water)
Sliding velocity: vg = 20 m/s (66 ft/s)
Viscosity: … 0.5 Pa·s
Solids content: … 0.3 %

MA251:
Pressure: p = 0 … 16 bar (232 PSI)
Temperature:
t = -20 °C … 160 °C (-4 °F … 320 °F) (oil),
0 °C … 60 °C (32 °F … 140 °F) (water)
Sliding velocity: vg = 20 m/s (66 ft/s)
Viscosity: … 1 Pa·s
Solids content: … 7 %

Materials

Seal face (MA250): High density carbon graphite
Seal face (MA251): Silicon carbide (Q1)
Seat (MA250/MA251): Silicon carbide (Q1)
Metal parts: CrNiMo steel (G)
Secondary seals: FKM (V)

Similar products

MA290 / MA291

MA290 / MA291

  • Cartridge
  • Balanced
  • Independent of direction of rotation
  • Stationary multiple springs
  • Springs and pin located on the atmospheric side

Read more

MA390 / MA391

MA390 / MA391

  • Cartridge
  • Balanced
  • Independent of direction of rotation
  • Stationary multiple springs
  • Springs and pin located on the atmospheric side

Read more

MD251

MD251

  • 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

Read more

Contact

Inquire about individual solutions

We develop and produce customer-specific special and individual solutions for every application.

Inquire now Discover reference projects
Back to the overview
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