UHMWPE Ball | Ultra High Molecular Weight Polyethylene Ball | 5mm to 310mm
UHMWPE (Ultra-High Molecular Weight Polyethylene) balls are high-performance thermoplastic spheres recognized for their exceptional wear resistance, impact strength, and extremely low coefficient of friction. With a molecular weight of 3 to 6 million g/mol, UHMWPE outperforms standard engineering plastics in abrasive environments. Designed as slurry pump check balls and impact-resistant plastic balls, these spheres resist cracking and abrasive wear when handling industrial mining slurries, concrete feeds, and particulate-laden wastewater. UHMWPE is highly resistant to corrosive chemicals, including strong acids and bases, and absorbs virtually zero moisture.
Applications
Abrasive Slurry Pumps
Used as reciprocating check spheres in slurry transfer pumps handling sand, clay, or ash.
Mining Flow Valves
Provides chemical and wear resistant flow control in acidic mining wash lines.
Food Conveyors
FDA-compliant wear elements in grain and bulk food handling conveyor assemblies.
Marine Sliders & Roller Bearings
Low friction spheres operating in saltwater environments without corrosion or swelling.
Wastewater Sealing Valves
Check spheres in wastewater treatment valves, resisting grit and chemicals.
Pneumatic Conveying Systems
Acts as diversion and flow control elements handling abrasive powders.
Features
Abrasion Resistance
Outstanding wear resistance in abrasive chemical slurry applications.
Low Coefficient of Friction
Coefficient of friction of ~0.15 provides self-lubricated performance.
High Impact Strength
Absorbs mechanical impacts and shocks without cracking or breaking.
Zero Moisture Absorption
Hydrophobic material remains dimensionally stable in water and steam.
Chemical Inertness
Outstanding resistance to strong acids, bases, and organic solvents.
Sub-Zero Temperature Range
Retains high impact resistance down to -150°C.
Lightweight Design
Low density (~0.94 g/cm³) reduces mechanical inertia in dynamic systems.
FDA Compliant
Natural unreinforced resin is safe for food processing and sanitary systems.
Technical Specifications
| Property | Value |
|---|---|
| Material | UHMWPE (Ultra High Molecular Weight Polyethylene) |
| Diameter Range | 5mm – 310mm |
| Grade | ISO 3290 Grade G10 |
| Temperature Range | -200°C to +80°C |
| Wear Resistance | Up to 10x greater than carbon steel |
| Impact Strength | Highest of any thermoplastic |
| Specific Gravity | 0.93 – 0.94 g/cm³ (floats on water) |
| FDA Compliance | Yes — food and pharmaceutical grade |
| Friction Coefficient | 0.1 – 0.2 (self-lubricating) |
| Export Markets | UAE, Germany, USA, Japan, Singapore, Brazil, Turkey, Middle East |
Available sizes
We supply UHMWPE balls in standard metric and fractional sizes. Custom diameters can be manufactured to match your specifications.
| Size | Metric | Inch | Tolerance |
|---|---|---|---|
| 1/4″ | 6.00 mm | 0.250″ | ±0.04 mm |
| 3/8″ | 9.52 mm | 0.375″ | ±0.04 mm |
| 1/2″ | 12.70 mm | 0.500″ | ±0.05 mm |
| 3/4″ | 19.05 mm | 0.750″ | ±0.05 mm |
| 1″ | 25.40 mm | 1.000″ | ±0.06 mm |
| 1-1/2″ | 38.10 mm | 1.500″ | ±0.10 mm |
| 2″ | 50.80 mm | 2.000″ | ±0.12 mm |
Manufacturing Process
Resin Sourcing
High molecular weight polyethylene powders (molecular weight 3.5M+ g/mol) are used.
Compression Molding
Raw powder is filled into heavy dies and molded at high compaction pressures to prevent voids.
Thermal Sintering
Molded billets undergo a controlled thermal schedule to fuse the polymer chains.
Precision Grinding
Sintered rounds are turned on CNC lathes and centerless ground to achieve spherical roundness.
Quality Audit
Sphericity and wear resistance indicators are verified in our inspection room.
Material comparison
Compare UHMWPE properties against PTFE to choose the correct material for your assembly.
| Characteristic | UHMWPE | PTFE |
|---|---|---|
| Abrasion Wear Resistance | Outstanding (best-in-class wear life in slurries) | Moderate (PTFE is softer and wears faster in gritty media) |
| Maximum Operating Temp | Up to +90°C (low thermal limit) | Up to +260°C (high thermal limit) |
| Sphericity & Machining | Moderate (material is tough and sticky to machine) | Excellent (high dimensional accuracy) |
| Dry Friction Coefficient | Low (~0.15) | Extremely Low (0.04 - 0.10) |
Compliance & Standards
IEC registered. FDA-compliant for food and pharmaceutical contact. ISO 3290 Grade G10. Floats on water (SG 0.93–0.94) — suitable for float valve applications. Regular export to UAE, Germany, USA, Japan, Singapore, Brazil, Turkey, and Middle East.
Frequently Asked Questions
What makes UHMWPE Balls better than standard HDPE Balls for abrasive service?
UHMWPE has a molecular weight 10–100x higher than standard HDPE, giving it wear resistance up to 10 times greater than carbon steel and the highest impact strength of any thermoplastic. This makes UHMWPE Balls the correct choice for abrasive slurry pump check valves in mining, dredging, and mineral processing where standard HDPE or plastic balls would rapidly wear.
What is the largest UHMWPE Ball you manufacture?
We manufacture UHMWPE Balls up to 310mm diameter — one of the largest sizes available globally. Large UHMWPE Balls (150mm to 310mm) serve large-bore water infrastructure check valves and large industrial pump check valves.
Do UHMWPE Balls float on water?
Yes. UHMWPE has a specific gravity of 0.93–0.94 g/cm³ — less than water — so UHMWPE Balls float. This makes them useful for float valve applications, liquid level control systems, and applications where buoyancy is needed.
Are UHMWPE Balls food grade?
Yes. UHMWPE is FDA-compliant and widely used in food processing and dairy equipment. Our UHMWPE Balls are safe for food and pharmaceutical contact applications requiring wear resistance combined with food-grade compliance.
Why is UHMWPE better than PTFE for slurry applications?
UHMWPE has much higher abrasion resistance and toughness. It resists erosive wear from sand, grit, and particulates far better than softer PTFE.
What is the maximum operating temperature of UHMWPE balls?
The maximum continuous operating temperature is +90°C. Exceeding this temperature causes the polymer to soften and lose its wear properties.
Do UHMWPE balls float on water?
Yes. UHMWPE has a density of approximately 0.94 g/cm³, allowing it to float on water, which is useful in float valves and level indicators.
Is UHMWPE chemical resistant?
Yes. It offers excellent resistance to most acids, alkalis, and organic solvents, similar to PTFE, though it is not as universally resistant at high temperatures.
How is UHMWPE molded?
Because of its extremely high molecular weight, UHMWPE cannot be injection molded. It must be compression molded from powder under high pressure and temperature.
Are UHMWPE balls food safe?
Yes. Natural UHMWPE resin is FDA compliant and is widely used in grain silos, commercial food packaging, and food conveyor components.
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