Machinery Ceramic Parts
Alumina Ceramic Discs for Water Pumps
Sealing and wear discs that outlast the pump service interval
The sealing face is where a water pump usually fails first: grit gets into the interface, the face scores, and the pump starts to leak. An alumina ceramic disc gives that interface a hard, chemically inert running surface. Discs are formed by hot pressing or dry pressing to a density of 3.6 to 3.9 g/cm3, then ground round or to whatever profile the pump housing needs.
Key Benefits
- Hard alumina face resists the abrasive particles that score a metal seal
- Corrosion resistant in water, so no rust ring forms around the seat
- Electrically insulating, which breaks any galvanic path across the seal
- Hot pressed or dry pressed depending on the density and cost target
- Round or fully custom profile to suit the existing housing
Problems It Solves
- Seal faces scoring and leaking after grit enters the pump
- Corrosion around a metal seat in hard or treated water
- Replacement discs that do not match the original housing profile
Who It Is For
- Pump manufacturers standardising on a ceramic seal face
- Aftermarket suppliers who need discs matched to an existing housing
- Maintenance teams replacing metal discs that fail inside the service interval
Application Scenarios
Water pump seal and wear faces
Pump seals and wear inserts on general machinery
Insulating washers and bushings inside pump assemblies
Refractory duty where the disc sits in a hot zone
Technical Features
- Density 3.6 to 3.9 g/cm3
- Formed by hot pressing or dry pressing
- White alumina body
- Round or custom shape
Manufacturing Process
Raw material preparation, forming, surface grinding, internal and external diameter grinding and precision CNC machining are all carried out in house.
Materials
- Alumina ceramic
Specifications
| Material | Alumina ceramic |
|---|---|
| Shape | Round or custom |
| Colour | White |
| Usage | Refractory and wear duty |
| Density | 3.6 - 3.9 g/cm3 |
| Forming method | Hot pressing or dry pressing |
Figures are taken from the published product specification. Values not listed are marked TBC and confirmed against your drawing before quotation.
Quality Control
- Diameter, thickness and face flatness checked before packing
- Inspection report to your drawing on request
- Packing and shipping documented with photographs
Certifications
No third party certification documents are published for this product. Every shipment is inspected to your drawing with an inspection report issued. Certification status is TBC and confirmed on request.
Customization Options
- Send the housing dimensions or the old disc and we match it
- Choose hot pressing or dry pressing according to the density you need
- Slots, bores and chamfers ground as required
Comparison With Other Ceramics
Alumina is the economic choice for water duty. Where the medium carries heavy abrasive load or runs hot, silicon carbide is the better face material; where the disc is thin and takes impact, zirconia is the safer body.
Use Guide
- Give the face flatness requirement, not only the diameter and thickness
- Seat the disc on a compliant gasket rather than directly onto machined metal
- Keep the disc square in the housing during assembly to avoid edge chipping
Industries Using This Part
Related Solutions
Alumina Ceramic Disc for Water Pump FAQ
Can you match a disc to my existing pump?
Yes. Send the drawing or the old disc with the dimensions that matter and we match the profile.
What density do the discs reach?
3.6 to 3.9 g/cm3, depending on whether the disc is hot pressed or dry pressed.
Is the disc suitable for insulating duty as well?
Yes. Alumina is a good electrical insulator, so the same disc breaks any galvanic path across the joint.
Do you supply samples before a production order?
Yes, free of charge, with freight paid by the buyer. Sample delivery is 4 to 7 working days.
What is the production lead time?
15 to 30 days if the goods are not in stock, depending on dimension and quantity.
Can the price be negotiated?
Discounts are considered for large volume orders.
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Send a 2D or 3D drawing with the critical dimensions marked. Samples are free of charge and delivered in 4 to 7 working days.
Send a 2D or 3D drawing by WhatsApp or email. Samples in 4 to 7 working days.