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Custom 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 can not leak out through this clearance. These sealing mechanisms are often referred to as “shaft seals” or “pump seals”.

Metallized Carbon Corporation manufactures the mechanical “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 primary seal ring manufactured using carbon graphite materials, 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 lift off 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.

Metallized Carbon Corporation's technical staff can recommend the Metcar grade that will optimize the customers seal design and performance.






Specifications

Material

Over 150 grades of Metcar available, made from combining Carbon/Graphite with Antimony, Bronze, Babbitt, Copper, Nickel, Silver, Steel, Stainless Steel, Monel, Thermoset Polymers, and High Temperature additives.

Size Limit

Up to 24” OD

Applications

Air Conditions
Aircraft Jet engines

Blenders

Gear boxes

Heat Exchangers

High Speed Turbine Compressors

Mixers

Pumps

Water turbines

Liquids Sealed

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, carbon dioxide, argon and ethane

Liquid chlorine

Liquid oxygen, nitrogen and hydrogen

LPG

Molten Metals

Molten sulfur

Oil mist

Plating Solutions

Potable water

Propane

Sea water

Solvents

Tanning Liquors

Xylene

Gasses Sealed

Air
Ammonia (Dry)

Argon

Carbon Dioxide

Chlorine (Dry)

Ethane

Ether

Ethylene

Freon

Hydrogen

Hydrogen Chloride (Dry)

Hydrogen Flouride (Dry)

Hydrogen Sulfide

Iodine

Natural Gas

Nitric Oxide

Nitrogen

Nitrous Oxide

Oxygen

Phosgene

Propane

Propylene

Steam

Sulfur Dioxide (Dry)

Vacuum

Temperature Rating

-400 to 1000 ºF

QA/QC Practices

All raw material physically tested prior to machining
DCC/CMM dimensional measurement/verification

Optical measurements

Compliances

All gaging and measurement equipment is calibrated and fully traceable to NIST Standards
ISO9001-2008


 DOWNLOADS 

Metcar Physical Properties
(PDF, 447KB)


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