Mechanical Seal Rings

Mechanical seal rings are used to seal the clearance between the rotating shaft and the stationary housing in equipment such as pumps and mixers so that liquid cannot leak out through this clearance. These sealing mechanisms are often referred to as shaft seals or pump seals.

Metcar manufactures the primary rings or carbon/graphite wear faces used in many of today’s most sophisticated and reliable mechanical seals for industrial, aerospace, and military applications. These mechanical seal assemblies usually consist of a carbon/graphite primary seal ring, a counter face ring, secondary (O-ring) seal rings, springs, fasteners, and a metal housing.

Mechanical seal assemblies are also used to seal gases in high-speed compressors. These dry gas seals are double mechanical seals that utilize a controlled barrier gas and spiral grooves in the counter face which provide aerodynamic liftoff or gas lubrication between the seal faces.

Mechanical seal primary rings can be supplied to customer drawings and specifications. The rings can be supplied plain, shrink-fitted, or cemented in metal retaining rings. Metcar mechanical seal rings can also be supplied with the sealing face lapped flat to one helium-light band.

  • • Air conditioning
  • • Aircraft jet engines
  • • Blenders
  • • Gear boxes
  • • Heat exchangers
  • • High speed turbine compressors
  • • Mixers
  • • Pumps
  • • Water/Steam turbines
  • • Acids
  • • Alkalies
  • • Anhydrous ammonia
  • • Beverages
  • • Bleaches
  • • Boiler feed water
  • • Diesel fuel
  • • Dry cleaning fluids
  • • Dyes
  • • Freon
  • • Fuel oil
  • • Gasoline
  • • Heat transfer oils
  • • Hydraulic oil
  • • Hydrocarbons
  • • Jet fuel
  • • Kerosene
  • • Lacquers
  • • Liquid air
  • • Liquid argon
  • • Liquid ethane
  • • Liquid chlorine
  • • Liquid oxygen
  • • Liquid nitrogen
  • • Liquid hydrogen
  • • LPG
  • • Molten metals
  • • Molten sulfur
  • • Oil mist
  • • Plating solutions
  • • Potable water
  • • Propane
  • • Seawater
  • • Skydrol
  • • Solvents
  • • Tanning liquors
  • • Xylene
  • • Air
  • • Ammonia (Dry)
  • • Argon
  • • Carbon Dioxide
  • • Chlorine (Dry)
  • • Ethane
  • • Ether
  • • Ethylene
  • • Freon
  • • Hydrogen
  • • Hydrogen Chloride
  • • Hydrogen Flouride (Dry)
  • • Hydrogen Sulfide
  • • Iodine
  • • Natural Gas
  • • Nitric Oxide
  • • Nitrogen
  • • Nitrous Oxide
  • • Oxygen
  • • Phosgene
  • • Propane
  • • Propylene
  • • Steam
  • • Sulfur Dioxide (Dry)
  • • Vacuum

specifications

material:Over 150 grades of our proprietary carbon/graphite Metcar material are available. Our engineers will work with you to select the optimum grade.

temperature rating:Air/Oxidizing Environments
-400 to 1000ºF

temperature rating:Neutral/Reducing Environments
-400 to 5600ºF

size limit:Mechanical seal rings are available up to 24’ OD.

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