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Tungsten Carbide Seal Rings & Mechanical Seal Faces
Custom tungsten carbide seal rings and mechanical seal faces for pumps, mixers and compressors. Cobalt- or nickel-bonded grades, lapped to your flatness spec.
Tungsten carbide is one of the standard face materials for mechanical seals. It runs against carbon graphite, silicon carbide or another carbide face, holds a lapped surface and tolerates abrasive particles in the fluid.
Specifications
| Material | Tungsten carbide, cobalt binder (YG) or nickel binder (YN) |
|---|---|
| Cobalt-bonded grades | YG6, YG6X, YG6H, YG8 |
| Nickel-bonded grades | YN6, YN6X, YN6H, YN8, YN8X, YN8H, YN10, YN10X, YN10H |
| Sintering | Vacuum sintered, or HIP (grades with the H suffix) |
| Ring types | Plain, stepped, grooved and complex seal rings |
| Maximum diameter | 500 mm |
| Grade properties | Binder content, grain size, density, hardness and TRS for each grade: see our Grades page |
Typical applications
- Mechanical seals for centrifugal pumps, mixers and agitators
- Seals for slurry, water, oil and chemical service
- Rotating and stationary faces, mating rings and seats
What we supply
- Plain rings, stepped rings and rings with slots, pin holes or drive notches
- Faces lapped and polished to the flatness and roughness on your drawing
- Blanks sintered to near-net shape for your own finishing
Choosing the grade
Cobalt-bonded grades are the common choice for general service. For seawater, acids or other corrosive fluids, nickel-bonded grades resist binder leaching better. Tell us the fluid, temperature and the counter-face material and we will propose a grade.
Grade data (binder content, grain size, hardness, density, transverse rupture strength) is confirmed in writing for the grade we propose. How we choose grades →
For a fast quotation, send
- Drawing with dimensions, tolerances and face flatness / roughness
- Fluid, temperature, pressure and speed, if known
- Counter-face material (carbon, silicon carbide, carbide)
- Quantity and whether this replaces an existing part
Questions buyers ask
Can you match an existing seal ring without a drawing?
Often yes. Send photos with measurements, or the seal manufacturer's part number, and describe the service. We will confirm what we need before quoting.
Can you supply an inspection certificate with the shipment?
Tell us which document you need — EN 10204 3.1, reporting measured values for your batch, is the usual request. It is confirmed in the quotation, before you commit.
Cobalt or nickel binder?
Nickel-bonded carbide is usually chosen for corrosive fluids such as seawater; cobalt-bonded grades are common for general service. The final choice depends on your fluid and should be confirmed against the grade data sheet.