Tungsten Carbide Rings

Forged with tungsten carbide’s extreme hardness, they ensure tight seals and wear resistance. Ideal for high – pressure, high – friction environments, our rings maintain precision under relentless stress.

Ring Types Kedel Provides for You

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What is a tungsten carbide ring?

Tungsten carbide rings are precision components with tungsten carbide as the core material, compatible with various sealing systems and valve assemblies. With high hardness (HRA 85 or higher), excellent wear resistance and corrosion resistance, they can operate steadily in high-pressure environments and corrosive media. Their main function is to maintain effective sealing, bear operational pressure and reduce wear between components. They are key components in industrial machinery and widely used in fields such as petrochemical engineering, machinery manufacturing and aerospace.

Common Seal Rings Hole Structures

The structural design of tungsten carbide rings dictates core performance metrics like sealing efficiency, load – bearing capacity, and wear resistance, directly influencing their in industrial applications.

Straight - Wall Type

Structural Feature：Features a uniform cylindrical cross – section with parallel inner and outer walls. The simple, consistent structure ensures stable dimensional tolerance.
Functional Advantage：Delivers reliable static sealing under low – to – medium pressure. Minimizes friction during axial/radial movement, suitable forial movement, suitable for precision guiding components.
Typical Applications：General – purpose seals in standard pumps, valves, and hydraulic cylinders; guiding rings in precision machining tools (e.g., CNC lathe spindles).

Tapered Type (Conical)

Structural Feature：Inner/outer diameters show gradual tapering (e.g., 3°–15° angle). The conical profile creates a self – centering effect under axial load.
Functional Advantage：Concentrates pressure to enhance sealing integrity in high – pressure systems. Improves load distribution, reducing localized wear.
Typical Applications：High – pressure oil/gas wellhead equipment; sealing rings in mining machinery (e.g., rock breaker hydraulic systems); cone crushers’ wear parts.

Grooved Type (Spiral/Annular)

Structural Feature：Integrates spiral/annular grooves on inner/outer surfaces. Grooves may be single or multi – channel, with depths of 0.2–1.5 mm.
Functional Advantage：Grooves act as lubricant reservoirs, reducing friction and heat. Spiral grooves can also guide fluid flow to flush contaminants.
Typical Applications：Sealing rings in high – speed rotating equipment (e.g., turbo – pump seals); wear – resistant rings in marine propeller shafts (with seawater lubrication).

What Products Are Commonly Used For?

Sealing rings are used in pumps, compressors, agitators, valves, and rotary joints.

Pumps

Application: Centrifugal pumps, reciprocating pumps in oil/gas, chemical, and refining industries.
Role: Seals aggressive fluids (corrosive, particle – laden media) under high pressure/temperature. Prevents leakage, extends pump lifespan in harsh conditions.
Why Choose It: Withstands abrasion from solid particles; resists corrosion by acids/alkalies. Maintains sealing integrity 3–5x longer than metal/ceramic rings.

Compressors

Application: Reciprocating/centrifugal compressors in petrochemical, natural gas sectors.
Role: Seals high – pressure gas streams (e.g., methane, hydrogen). Endures cyclic pressure changes and extreme temperatures.
Why Choose It: High hardness (≥90 HRA) resists deformation; low friction ensures stable operation. Cuts maintenance downtime by 40% in high – cycle systems.

Agitators

Application: Reactor agitators in chemical, pharmaceutical plants (corrosive, high – temp environments).
Role: Seals rotating shafts against reactive fluids (e.g., solvents, catalysts). Prevents hazardous leaks into reactors.
Why Choose It: Maintains precision tolerances (≤0.002mm) under continuous rotation. Outperforms stainless steel in acidic media by 80%+ lifespan.

Valves

Application: Gate valves, globe valves in oil/gas pipelines, chemical processing (high – pressure, abrasive media).
Role: Seals valve seats/discs to block fluid flow. Critical for zero – leakage in emergency shutdown systems.
Why Choose It: Resists galling (metal adhesion) during frequent cycling; handles abrasive slurries (e.g., mining sludge) without failure.

Rotary Joints

Application: Cooling systems (CNC machines), hydraulic circuits (injection molding), paper mills (steam transfer).
Role: Seals rotating interfaces in multi – directional fluid transfer. Adapts to high – speed rotation (≤3000 RPM) and mixed media.
Why Choose It: Self – lubricating under dry – run conditions; maintains seal in misaligned shafts. Reduces leakage rates by 90% vs. rubber seals.

Application Scenarios of Rings

Tungsten carbide rings play an important role in the industrial sector. From precision machinery to high-stress engineering, their application range is very extensive.

Fluid Conveyance

Reaction Agitation

Fluid Control

Rotary Sealing

What You Need to Know About Common Ring Parameters

The common parameters of tungsten carbide rings mainly revolve around aspects like material composition, physical properties, and dimensional accuracy. Different application scenarios emphasize distinct parameters. Here’s a breakdown of the core parameters

Material-Related Parameters

WC Content Range	Core Performance	Typical Scenarios	Key Property Trade-off
≥95% (Ultra-High Grade)	Extreme abrasion resistance, high hardness	Sand-laden mud drilling, granite penetration, abrasive slurry systems	Max wear resistance ↔ Lowest toughness (prone to chipping under heavy impact)
85%–90% (Medium Grade)	Balanced hardness & toughness	Conventional drilling (sandstone reservoirs), general industrial sealing	Versatile for mainstream applications
80%–85% (Medium-Low Grade)	Enhanced toughness, moderate wear resistance	Soft formation drilling (shale, clay), vibration-prone rotary joints	Toughness priority over extreme abrasion resistance

❗ Ultra-high WC excels in abrasive environments but risks fracture in gravel layers; medium-low WC resists chipping in offshore/vibratory systems.

Binder Type	Core Property	Applicable Scenarios	Formulation & Cost Notes
Cobalt-based (Co, 3%–6%)	High hardness + wear resistance	Precision sealing (pumps, valves), fine grinding tools	Low Co → Brittle risk; requires smooth operation conditions
Cobalt-based (Co, 10%–20%)	High toughness + impact resistance	Mining machinery, heavy-load drill bits	High Co → Lower hardness; 30%+ cost increase vs. low-Co grades
Nickel-based (WC-Ni)	Acid/alkali corrosion resistance	Sour gas wells (H₂S), chemical processing	Ni enhances oxidation resistance; 50%+ cost vs. Co-based
Iron-based (WC-Fe)	Economical corrosion resistance	Low-corrosive industrial pumps, general valves	Weaker than Ni in strong acids; 40% cost reduction vs. Ni

❗ Cobalt-based accounts for 80% of applications (cost-effective/versatile); Ni/Fe grades need strict sintering atmosphere (oxygen-free) to avoid oxidation defects.

physical property parameters

Specific Parameter	Measurement/Range	Key Features	Application Notes
Rockwell Hardness (HRA)	89–93	Near-diamond hardness	General industrial sealing systems
Vickers Hardness (HV)	1200–2400	High indentation resistance	Precision grinding tools (e.g., bearing rings)
High-Temp Hardness Retention	≥80% of room-temperature hardness at 700℃	Maintains hardness under thermal load	Aerospace engine seals, high-temp valves

❗ For high-temperature applications, prioritize “High-Temp Hardness Retention” data over room-temperature values.

Specific Parameter	Measurement/Range	Key Features	Application Notes
Bending Strength	1500–3000 MPa (e.g., YG8: ~1800 MPa)	Reflects fracture resistance	High-impact scenarios (e.g., crusher wear parts)
Tensile Strength	980–1500 MPa	Marked for extreme tensile loads	Heavy-load valves, tension-bearing rotary joints

❗ Tensile strength is rarely standalone; combine with bending strength for impact-resistant design.

Parameter Category	Specific Parameter	Measurement/Range	Key Features	Application Notes
Density	Density Range	14.5–15.5 g/cm³ (Theoretical WC: 15.63 g/cm³)	Closer to theoretical value = more stable performance	Precision seals (strict uniformity requirements)

❗ Density uniformity directly affects sealing precision; use ultrasonic testing for verification.

Specific Parameter	Measurement/Range	Key Features	Application Notes
Melting Point	Pure WC: ~2870℃ Alloy: Lower (due to binder addition)	Binder phase reduces melting temperature	Mark as “Max Operating Temp”: Conventional: ≤500℃; Modified: ≤800℃
Thermal Conductivity	80–160 W/(m·K)	Affects heat dissipation efficiency	High-temp equipment (e.g., hot rolling mill seals)

❗ For thermal shock scenarios, combine thermal conductivity with “high-temp hardness retention” data.

Dimensions and Precision

Parameter	Core Feature	Use Case
Inner Diameter (ID)	Marked as “ID = X mm” (e.g., ID = 20 mm)	Adapts to shaft/hole sealing structures in pumps/valves
Outer Diameter (OD)	Marked as “OD = X mm” (e.g., OD = 30 mm)	Matches housing dimensions of compressors/agitators
Thickness (T)	Marked as “T = X mm” (e.g., T = 5 mm)	Provides structural support for rotary joint seals

❗ Custom dimensions required for non-standard equipment (e.g., high-pressure valves).

Parameter	Core Feature	Use Case
Roundness & Cylindricity	Precision seals: Roundness ≤0.002 mm, Cylindricity ≤0.005 mm	Ensures leak-proof performance in shaft/hole mating
Surface Roughness	Sealing face: Ra ≤0.2 μm; Ultra-precision (aerospace): Ra ≤0.05 μm	Critical for hydraulic system seals in aerospace/defense

❗ Achieving tight tolerances requires precision grinding (e.g., CNC lapping).

Parameter	Core Feature	Use Case
Grooved/Threaded Rings	Groove depth (e.g., 0.5 mm), width (e.g., 1 mm), thread pitch	Enhances lubrication in high-speed rotating joints
Composite Structure Rings	Cone angle (e.g., 5°–10° for double-taper designs)	Optimizes load distribution in high-pressure valves

❗ Special structures require 3D simulation to verify fluid dynamics/mechanical compatibility.