Tungsten Carbide Ring
This is a tungsten carbide seal ring used in mechanical seals for pumps, valves, and rotating equipment in petroleum, chemical, and industrial applications. It is manufactured from cemented carbide with high hardness and strength,…
Product Overview
This is a tungsten carbide seal ring used in mechanical seals for pumps, valves, and rotating equipment in petroleum, chemical, and industrial applications. It is manufactured from cemented carbide with high hardness and strength, designed to resist wear and corrosion in abrasive or chemically aggressive environments. The ring is available in flat (PH) and step (TH) types, and can be produced to customer drawings. It is ground to tight tolerances after sintering to ensure optimal sealing performance.
Key Benefits
- High wear resistance in abrasive and high-pressure service, extending seal life
- Corrosion resistance to acids, alkalis, hydrocarbons, detergents, and sea water
- Maintains shape and hardness at temperatures up to 500°C, stable at 1000°C
- Minimal dimensional margin after sintering due to precise pressing and grinding
- No deformation under compression, suitable for high-load sealing applications
Technical Data
Values below come from the product data we publish. Anything not listed is confirmed against your drawing at quotation.
| Material | Cemented tungsten carbide (WC-Co) |
|---|---|
| Grades Available | YS2T YG8 YG15 YN8, selected based on service conditions |
| Dimensions | Ø12mm to 400mm, custom sizes to drawing |
| Shape | Flat (PH), step (TH), and other special shapes |
| Finish | Ground to tight tolerance after sintering |
| Lead Time | Stock items 3-5 days after payment; customised items quoted per order |
Problems It Solves
- Steel and ceramic seals wear out quickly in abrasive or corrosive fluids, leading to leaks and downtime
- Seal rings deform under high pressure, causing leakage and loss of sealing integrity
- Poor dimensional control after sintering forces excessive grinding, increasing cost
- Lack of chemical stability leads to rapid degradation in acid or alkali service
- Inconsistent material structure causes cracking or delamination during operation
Who It Is For
- Pump and valve manufacturers needing wear-resistant seal components
- Machinery builders specifying long-life seals for harsh environments
- Maintenance teams replacing seals that fail prematurely in abrasive service
- Industrial equipment OEMs requiring repeatable, high-precision seal rings
- 3D printing hardware developers integrating durable sealing parts
Application Scenarios
- Mechanical seals in centrifugal pumps handling sand-laden crude oil
- Valve stem seals in petrochemical process lines exposed to corrosive fluids
- Rotating shaft seals in ball mills and bead mills with abrasive slurries
- High-temperature seals in industrial machinery where steel fails quickly
- Seals in 3D printing hardware where precision and durability are critical
Technical Features
- Available in flat (PH) and step (TH) configurations, and other special shapes
- Manufactured from high-density cemented carbide with uniform microstructure
- Surface ground to minimal tolerance for superior sealing performance
- Processed with corrosion-resistant rare elements added during sintering
- High hardness and strength prevent deformation under compression
Materials and Grades
- WC-Co cemented carbide with cobalt content balanced for hardness and toughness
- YS2T (92 HRA) for high wear resistance in clean abrasive service
- YG8 (89 HRA) for balanced wear and impact resistance
- YG15 (86-87 HRA) for high toughness in impact-prone applications
- YN8 with added corrosion-resistant elements for aggressive chemical environments
Customisation Options
- Manufactured to customer drawings, including non-standard and specially shaped rings
- Grade selected based on fluid, abrasion load, temperature, and pressure cycle
- Flat (PH), step (TH), and other special shapes available
- Samples produced for pre-testing before bulk order release
- Matched ring and mating part pairs can be supplied together
How This Part Is Made
Drawing review and grade selection
Powder blending with selected WC-Co and additives
Pressing on imported press for consistent green density
Over-pressure sintering to close porosity and stabilise structure
Grinding to final dimensions and tolerance
Dimensional and physical inspection
Packing and shipping
Quality Control
- Physical properties, shape and tolerance are checked before shipping
- Every order is tested before bulk production is released
- Inspection photographs of the finished order are sent for confirmation before delivery
- Blank edges must not exceed 0.33mm depth of drop
- Surface must be free of peeling, bubbling, delamination, cracks, porosity, or burn defects
Use Guide
- Send the drawing, operating conditions, fluid type, temperature, and pressure cycle for correct grade selection
- Order the seal ring and mating part together to ensure proper fit and lapping
- Ensure full face support during installation; avoid point loading on unsupported edges
- Avoid sudden thermal shock when installing a cold ring into a hot system
- Keep one sample from the first batch for comparison during future inspections
How It Compares With The Alternatives
| Alternative | Trade-off |
|---|---|
| Hardened steel seal ring | Steel is cheaper and easier to machine, but wears rapidly in abrasive or corrosive service, leading to frequent seal failure |
| Ceramic seal ring | Ceramic has similar hardness but is more brittle under impact; carbide tolerates pressure cycling better |
| Coated seal ring | Coatings wear through and expose the base metal, which then fails quickly; solid carbide wears uniformly throughout its life |
Tungsten Carbide Ring FAQ
Are you a trade company or a manufacturer?
A manufacturer. The company has produced tungsten carbide parts for over 15 years and takes on design and processing of carbide products with technical support.
Where is your factory located?
Zhuzhou City, Hunan Province, China, which is the country's tungsten carbide production base.
Can you make seal rings to my own drawing?
Yes. OEM and ODM to customer drawings is standard, including flat, step, and other special-shaped rings.
Can I get a sample before placing a bulk order?
Yes. Samples are available for pre-testing. Send the drawing and service conditions for a quote.
How long does an order take?
Stock items are shipped 3-5 days after payment is received. Customised items are given a delivery time in the quotation.
How do I know the parts were checked before they shipped?
Physical properties, shape and tolerance are inspected before shipping, and detailed inspection photographs of the order are sent for confirmation before delivery.
Which grade should I choose?
It depends on the service. YS2T offers high wear resistance; YG8 balances wear and impact; YG15 is tougher under shock; YN8 resists corrosion. Send the operating conditions for a recommendation.
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Send the drawing or the dimensions plus what the part runs against. Samples are available for pre-testing before a bulk order.