Place of Origin:Guangdong, China
Material Introduction:
Made from 95%–99.7% high-purity alumina ceramic (Al₂O₃). Titanium alloy or stainless-steel shaft extensions and metal connection parts are available when required by the assembly design.
Functional Features:
Provides good wear resistance, corrosion resistance in water-based environments, and dimensional stability. Precision-ground or polished surfaces help reduce friction and maintain a stable fit between the piston and pump body. Diameter, length, bore structure, end geometry, tolerance, and surface finish can be customized according to customer drawings.
Application Industries:
Suitable for reverse osmosis water purification equipment, aquarium circulation pumps, desktop water dispensers, beverage vending equipment, small appliance pumps, hydrotherapy equipment, dishwasher drainage pumps, and compact cooling circulation systems. View more ceramic pump components.
Global OEM Supply:
Serving OEM customers in the USA, Germany, Japan, and Europe.
Lead Time:
Standard specifications usually require 15–30 days. Custom dimensions, special bores, or non-standard piston designs usually require 35–50 days. The final lead time depends on material grade, dimensions, tolerances, surface finish, inspection requirements, and order quantity.
This alumina ceramic pump piston is made from 95%–99.7% alumina for water purifiers, aquarium circulation pumps, water dispensers, and small appliance pumps. Its precision-ground or polished surface reduces friction against mating parts and helps maintain a consistent running clearance. It addresses common problems found with metal pistons, including wear, corrosion, unstable pumping, increased leakage risk, and frequent maintenance during long-term water circulation.
The piston body is available in 95%, 96%, 99%, or 99.7% alumina ceramic (Al₂O₃). The material grade is selected according to the working fluid, wear conditions, required cleanliness, and project budget.
The final material and structure should be confirmed according to the piston load, assembly method, operating medium, and expected service life.
Explore more custom ceramic pump components for fluid-handling equipment.
The following values are typical references. Actual performance depends on alumina purity, piston dimensions, machining method, and test conditions. Final specifications should be confirmed against the approved drawing and selected material grade.
| Parameter | Reference Technical Indicator | Notes |
|---|---|---|
| Material Grade | 95%–99.7% Alumina | Selected according to wear resistance, cleanliness, cost, and operating conditions |
| Vickers Hardness | 18–22 GPa for selected high-purity grades | Actual hardness varies with alumina purity and material grade |
| Surface Finish (Ra) | 0.05–0.2 μm | Reference range available after precision grinding or polishing |
| Cylindricity | ≤ 0.005 mm | Depends on piston diameter, length, and structure |
| Compressive Strength | > 2100 MPa for selected high-purity grades | Actual value depends on material grade, product structure, and test method |
| Thermal Expansion | Approx. 8.1 × 10−6/K | Typical reference value that varies with material grade and temperature range |
| Comparison | Alumina Ceramic | Zirconia Ceramic | Stainless Steel |
|---|---|---|---|
| Wear Resistance | Well suited to repeated sliding movement | Good wear resistance with higher toughness | Depends on the steel grade and surface treatment |
| Impact Resistance | Moderate; careful installation is required | Better for impact or side-load conditions | Generally good |
| Resistance in Water | Good stability in common water-based media | Good stability in common water-based media | Depends on water quality and stainless-steel grade |
| Surface Finishing | Can be precision-ground and polished | Can achieve a smooth polished surface | Easy to machine but may wear over time |
| Dimensional Stability | Good | Good | More affected by temperature changes |
| Metal Contamination Risk | Low | Low | May produce wear particles or corrosion products |
| Relative Cost | Balanced performance and cost | Usually higher than alumina | Initial cost may be lower |
| Typical Use | Small water pumps and continuous circulation systems | Pumps requiring greater toughness or impact resistance | General pumps with limited wear requirements |
This product is an alumina ceramic pump piston rather than a shaft used mainly for rotary transmission. It is intended for compact pumps in water purifiers, aquarium systems, water dispensers, small appliances, and water circulation equipment. Final suitability should be checked against the actual pump design.
Available options include 95%, 96%, 99%, and 99.7% alumina. Grades between 95% and 96% suit general small water pumps, while 99%–99.7% alumina is used when higher wear resistance, cleanliness, or chemical stability is required.
Yes. We manufacture custom alumina ceramic pistons in solid, through-bore, blind-bore, and stepped designs. Outer diameter, length, bore, end geometry, tolerance, and surface finish can be evaluated from a drawing or sample.
A ground or polished surface reduces friction against the pump body or seal and helps limit wear on mating parts. The required surface finish depends on the running clearance, pump structure, and operating conditions.
Alumina has good chemical stability, but suitability for drinking-water equipment also depends on the full pump assembly, connection materials, cleaning process, and local regulations. Project-specific validation should be completed before final use.
Yes. We serve OEM customers in the United States and also support projects in Germany, Japan, and Europe with drawing review, prototype validation, custom production, and volume manufacturing.
Standard specifications usually require 15–30 days. Custom dimensions, special bores, or non-standard structures usually require 35–50 days. Final lead time depends on the material grade, dimensions, tolerances, surface finish, inspection requirements, and order quantity.
Please send your 2D or 3D drawing, required alumina grade, outer diameter, length, bore structure, tolerance, surface roughness, working medium, pump type, and estimated quantity. We will review the design and recommend a suitable material, machining process, inspection plan, and production lead time.
