99 5 pure aluminum oxide alumina is preferred.
Ceramic seal faces.
In general dissimilar materials are used for seal faces.
Ceramic generally a 99 5 aluminum oxide offering excellent wear characteristics due to it s hardness.
In evaluating materials for seal faces both the properties of the individual materials and the combination of the tribological pair must be considered.
It is chemically inert and can be applied to nearly any product.
The more common end or rotating face mechanical seal designs feature mating faces as the primary sealing elements.
They provide longer life and greater operating safety.
Lower purity grades typically 85 are available but are more subject to chemical attack and thermal shock.
Kemet lapping systems are used in both manufacturing and reconditioning processes.
Carbon ceramic silicon carbide or tungsten carbide may be considered.
For best results with double or tandem seals handling abrasive the inboard seal faces should be a hard material such as silicon carbide vs.
If ceramic faces are not holding up and upgrade to silicon carbide which is in the same family of materials is a harder alternative.
Combination of ceramic carbon graphite seal faces are ideal choice for leak proof maintenance free applications.
Carbon tungsten carbide ceramic silicon carbide chrome oxide stellite ni resist and phosphor bronze.
Ceramic cannot however handle the thermal shocks that ni resist or 17 4 seats can.
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Common types of mechanical seal face.
It is chemically inert and can be applied to nearly any product.
At rcpl we manufacture mechanical seal faces in various sizes and compositions like ravituff 99 ravituff 95 eco alumina steatite and saz.
These materials are frequently thought of as the soft face and the hard face although sometimes two hard faces are used.
Silicon carbide while the outboard seal faces should have maximum lubricity such as.
Ceramic seal rings is the best seal face material for highly corrosive chemical services we supply the high alumina ceramic materials.
Kylin ky seals is currently selling mechanical seals elastomer bellow mechanical seals o ring mechanical seals ptfe wedge mechanical seals teflon bellow mechanical seals metal bellow mechanical seals cartridge mechanical seals etc seal faces silicon carbide seal faces reaction bonded silicon carbide sintered silicon carbide sintered silicon carbide with graphite reaction bonded.
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.
Stationary sealing members of buna epr.