Panoramica del prodotto

Borosilicate Glass Balls are precision glass spheres manufactured for applications where chemical resistance, thermal stability, non-magnetic performance and visual clarity are more important than metal-like impact strength or high bearing load capacity. They are widely used in flow-control, metering, dosing, laboratory, pharmaceutical, cosmetic and industrial process equipment.

Compared with soda lime glass balls, borosilicate glass balls offer better thermal shock resistance and improved chemical durability. Compared with metal balls, they are non-magnetic, electrically insulating, corrosion resistant and visually transparent. Compared with plastic balls, they provide higher hardness, better dimensional stability at elevated temperature and better resistance to many aggressive media.

Material Selection & Technical Positioning

Borosilicate glass is a technical glass based primarily on silica and boron oxide. The low thermal expansion and high chemical durability of borosilicate glass make it a preferred choice for demanding fluid-control and laboratory environments where ordinary glass or plastics may deform, crack, swell or lose stability.

This product should not be positioned as a high-load bearing ball or impact-resistant metal replacement. It is best specified when the buyer needs corrosion resistance, thermal shock resistance, electrical insulation, non-magnetic behavior, clear appearance and predictable performance in valves, pumps, metering systems and process assemblies.

Specifiche tecniche

Proprietà	Typical / Recommended Content
Diameter Range	2.0 mm – 100.00 mm; other sizes subject to production confirmation
Grado di precisione	G20, G40, G100, G200, G500, G1000; selected according to application and cost target
Durezza	Mohs 6
Densità	Approx. 2.2-2.3 g/cm3
Modulo di Young	Approx. 60-65 GPa reference range
Magnetismo	Non-magnetic
Colore	Clear / transparent
Wear Resistance	Fair to good, depending on media and load
Electrical Behavior	Excellent electrical insulator
Chemical Resistance	Excellent resistance to corrosion and most acids; chemical compatibility should be confirmed for the actual medium
Thermal Performance	High thermal shock resistance; suitable for elevated-temperature applications within confirmed working limits
Finitura superficiale	Polished or precision finished according to grade and application

Chemical Composition Reference

The chemical composition of borosilicate glass may vary by formulation and supplier standard. The following table is a reference range for engineering and procurement communication. Final material specification should follow the agreed purchase order, drawing, sample approval or test report.

Component	Reference Range
SiO2	65.00-85.00 %
B2O3	8.00-15.00 %
Na2O	3.00-9.00 %
Al2O3	1.00-5.00 %
CaO	Max. 2.50 %
K2O	Max. 2.00 %
BaO	Max. 1.00 %

Heat Resistance, Chemical Resistance & Performance

Borosilicate glass balls are selected for harsh media and temperature variation because the material has a lower coefficient of thermal expansion than soda lime glass and better resistance to thermal shock. They are suitable for many environments where standard glass or plastics may be less stable.

For chemical service, borosilicate glass provides excellent resistance to corrosion and most acids. However, buyers should not treat any glass as universally resistant to all chemicals. Hydrofluoric acid, strong hot alkalis, high mechanical impact, abrasive slurry and rapid pressure shock require special evaluation before material selection.

Applications & Application Fit

Applicazione	Fit Level	Why It Fits	Buyer Note
Metering pumps and dosing systems	Very good	Chemical stability, transparent appearance and stable spherical geometry support dosing consistency	Confirm chemical medium, temperature and sealing requirement
Check valves and ball valves	Very good	Non-corroding, non-magnetic glass ball can provide reliable sealing in compatible fluids	Confirm seat material and pressure condition
Pharmaceutical and cosmetic dispensing components	Very good	Clear appearance, corrosion resistance and clean surface support visual inspection	Confirm cleanliness, packaging and regulatory requirements
Laboratory apparatus and instruments	Very good	Good chemical and thermal resistance with electrical insulation	Confirm actual chemical compatibility
Flow meters and visual indicators	Bene	Transparent and non-magnetic ball supports visible movement and measurement	Confirm density and buoyancy requirements
Filling material / process media	Bene	Chemically stable glass sphere for compatible process assemblies	Confirm particle size, cleanliness and media compatibility
Light grinding or milling media	Application-dependent	Hard glass surface may be useful where metal contamination must be avoided	Avoid high-impact or heavy abrasive grinding
High-load bearings or impact mechanisms	Limited	Glass is hard but brittle compared with steel or ceramic	Consider stainless steel, ceramic or metal balls instead

Material Selection Guide

Material Option	Typical Strength	Limitation	When to Recommend
Borosilicate glass balls	High thermal shock resistance, excellent chemical resistance, clear and non-magnetic	Brittle under impact; not for heavy bearing loads	Metering pumps, check valves, laboratory, pharma, cosmetic and harsh-media flow control
Soda lime glass balls	Economical, hard, corrosion resistant in stable environments	Lower thermal shock resistance than borosilicate	Cost-sensitive valves, instruments, bottle caps, decorative and light industrial uses
Black glass balls	Opaque, low-glare, visually distinct glass option	Material formulation and corrosion resistance must be confirmed	Optical, decorative, low-glare and selected instrument applications
Ceramic balls	Very high hardness, wear resistance and corrosion resistance	Higher cost; material selection is more specialized	High wear, chemical, high-temperature or precision applications
Stainless steel balls	Tougher than glass and available in different corrosion grades	Magnetic/non-magnetic and corrosion performance vary by grade	Higher load, mechanical assemblies, valves and corrosion-sensitive metal applications
Palline di plastica	Lightweight and low cost with broad chemical options	Lower hardness and temperature capability than glass	Float valves, low-load valves, lightweight assemblies and chemical-compatible plastic applications

Manufacturing & Process Control

Borosilicate glass balls require stable forming, controlled sizing, precision finishing, polishing, cleaning and grading to support repeatable performance in valves, metering systems and industrial assemblies. For precision applications, ball diameter, roundness, surface appearance and cleanliness should be controlled according to the required grade and final use.

SDBALLS can support standard and customized orders according to material, diameter, grade, finish, packing and application requirements. For OEM projects, sample approval and application confirmation are recommended before mass production.

Quality Control & Inspection

Quality control for borosilicate glass balls should focus on dimensional accuracy, grade consistency, roundness, surface appearance, clarity, contamination control, packing condition and application compatibility. For sealing or metering use, buyers should confirm the grade and tolerance needed for reliable seating and dosing performance.

• Diameter and grade inspection
• Roundness and surface appearance checking
• Visual inspection for cracks, chips and obvious inclusions
• Material and color confirmation when required
• Cleanliness and packing inspection for pharmaceutical, cosmetic or laboratory applications
• Third-party testing or inspection documents upon project request

Packing Options

SDBALLS can supply borosilicate glass balls in bulk industrial packing or customized OEM packing according to size, quantity, cleanliness requirement and shipping method. Protective packing is important because glass balls should be protected from impact, chipping and contamination during transport.

• Plastic bag + carton packing for small and medium quantities
• Bottle, pail, drum or carton packing according to diameter and weight
• Palletized export packing for bulk orders
• Customized labels with material, size, grade, lot number and quantity
• Cleaner packing options for laboratory, pharmaceutical or cosmetic supply programs

How to Specify for Quotation

To quote borosilicate glass balls accurately, please confirm the following information:

• Material: borosilicate glass / required glass standard if specified
• Diameter in mm or inch
• Precision grade or tolerance requirement
• Quantity and annual demand estimate
• Application: valve, metering pump, dosing system, grinding, filling, laboratory, cosmetic or pharmaceutical use
• Working medium, temperature, pressure and chemical exposure
• Surface finish, cleanliness and visual appearance requirement
• Packing method and label requirement
• Inspection report, third-party test or sample approval requirement
• Destination port, trade term and target delivery schedule

Technical FAQ

Q: What is the difference between borosilicate glass balls and soda lime glass balls?

A: Borosilicate glass balls provide better thermal shock resistance and stronger chemical stability than standard soda lime glass balls. Soda lime glass is often used for cost-sensitive applications in stable temperature environments, while borosilicate glass is preferred for harsher chemical or temperature conditions.

Q: Are borosilicate glass balls magnetic?

A: No. Borosilicate glass balls are non-magnetic, making them suitable for use near instruments, sensors, flow-control systems and applications where magnetic interference is not acceptable.

Q: Can borosilicate glass balls be used in check valves and metering pumps?

A: Yes. They are commonly used in check valves, metering pumps, dosing systems and ball valves where chemical resistance, stable spherical geometry and non-magnetic performance are required. Seat material, pressure, temperature and working medium should be confirmed.

Q: Are borosilicate glass balls corrosion resistant?

A: Yes, they offer excellent corrosion resistance and are resistant to many acids and chemicals. However, chemical compatibility should always be confirmed, especially for hydrofluoric acid, strong hot alkalis or special aggressive media.

Q: Can borosilicate glass balls replace stainless steel balls?

A: Only in suitable applications. Borosilicate glass is corrosion resistant, non-magnetic and electrically insulating, but it is more brittle than stainless steel. For high-load mechanical impact or bearing applications, stainless steel or ceramic balls may be more suitable.

D: Quali gradi di precisione sono disponibili?

A: Common grades include G20, G40, G100, G200, G500 and G1000. The correct grade depends on sealing accuracy, metering performance, surface requirement and cost target.

Q: Can these balls be used as grinding media?

A: They can be used in selected light grinding or milling applications where metal contamination must be avoided and the process load is suitable for glass media. They are not recommended for heavy impact grinding or highly abrasive slurry without testing.

Q: What information is needed for a quotation?

A: Please provide material, diameter, grade or tolerance, quantity, application, working chemical medium, temperature, pressure, surface finish, cleanliness requirement, packing method, inspection documents and destination.