Ceramic Mechanical Seal Face

The more common end or rotating face mechanical seal designs feature mating faces as the primary sealing elements. Rings of ceramic carbide carbon or composites of these materials are lapped flat in the range of less than 1 micron on an axial end face. The old adage pay me now or pay me later applies to seals.

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Ceramic seal faces can last 20 years and are a very cost effective option.

Ceramic mechanical seal face.

This paper will review some of the most common seal face materials. The seal is comprised of the case spring diaphragm and washer which come locked together as one piece. Mechanical seals require clean water or other compatible liquid for the lubrication of the seal faces. Mechanical seals mechanical seals supplies uk for virtually any application.

Exotic materials have been developed including ceramics and various grades of mechanical carbons. The faces must be stable conduct heat. For double mechanical seals back to back en specifies the short type only. Mechanical seals face materials.

The seal faces of a mechanical seal provide a demanding set of requirements for a seal designer. Single spring mechanical pump seals multipule springs metal bellows in both in line and cartridge seals. You must consider the environment the seal will be exposed to. Mechanical seals according to en 12756 code system for single mechanical seals there is a distinction drawn between standard n and short k types.

The faces in a typical mechanical seal are lubricated with a boundary layer of gas or liquid between the faces. For use in waste water boiler feed and compressor pumps these seals have an extra long spring that accommodates variations in seal cavity length. Mating faces for pump seals. Ceramic mating faces are used for water and general service applications including oil.

John crane is an american company now a subsidiary of smiths group and provider of engineered products and services including mechanical seals couplings hydro dynamic bearings seal support systems filtration systems and artificial lift. The seat is comprised of the seat and the gasket. The choice of seal face depends on the mechanical seal application. Ceramic seal faces for mechanical seals engineered cartridge seals.

Other mechanical seal hardware which includes shaft sleeves gland rings collars compression rings and or pins. Symbols a area of sliding face a h area hydraulically loaded by medium pressure b width of sliding face. M barnwell services mechanical seals are one of the most effective ways of sealing rotating shafts consisting of two lapped faces arranged perpendicular to the axis of the rotating shaft which gives rise to the alternative name radial face seal pump seals or packings. Mechanical seals come in a wide range of designs however the most important factor when determining how long a seal is going to last is deciding on the right seal face materials.

They come furnished as two pieces the seal and the seat.