China Ceramic Alumina Tube manufacturer

Al2O3 Ceramic Seals , Alumina Ceramic Disc Strong Acid Alkali Resistant Fine Grinding

Product Details:
Place of Origin: China
Brand Name: Jinghui Ceramics
Certification: RoHS
Model Number: JH.CR.001
Payment & Shipping Terms:
Minimum Order Quantity: 5000 sets per order
Price: Negotiable
Packaging Details: Plastic bag with export carton
Delivery Time: 3~4 weeks
Payment Terms: T/T, Western Union, MoneyGram, Paypal, , L/C
Supply Ability: 100000 sets per month

Detail Information

Product Name: Ceramic Seal Disk For Pump Material: High Purity Alumina
Type: Ceramic Disc Color: Purity White
Size: OD Is Up To 100mm Feature: High Temperature Resistance
Tolerance: As Design Drawing Or OEM Shape: Customized Designs
Surface Treatment: Diamond-polished Application: Ceramic Seal Disc For Valve
High Light:

alumina ceramic disc


ceramic disc tap washers

Product Description

High Polished Durable Al2O3 Alumina Ceramic Seal Disk for Pump

Specification and ceramic seal disk

Available materials 96% alumina, 99% alumina, silicon carbide (SiO2) and Silicon nitride (Si3N4)
Roughness Fine polishing better than Ra0.3, diamond polishing better than Ra0.1
Dimension The max. outer diameter up to 50mm
Other parameters Flatness to be 0.002mm, perpendicularity: 0.005mm, Parallelism : 0.002mm
Nominal tolerance Size less than 10mm with 0.10mm, size over than 10mm with 1% of dimensions
Precision process Polishing, fine grinding, CNC machining



Main features of the ceramic seal disk

1. Excellent wear-resistance and abrasion resistance, over 276 times than stainless steel

2. Exceptional hardness, the hardness is up to 1700MPa

3. Chemical stability, resistant most of strong acid and alkali

4. Perfect surface contact area ratio: the value can ensure between 60 ~ 80%

5. Great mechanical properties, hardness, compressive and flexural strength

6. Precise and consistent dimensions every batch via fine grinding

7. Eco-friendly and safe, the material meets FDA, LFGB completely


Description of ceramic seal disk for pump

Ceramic seal disk valving is an innovative liquid control system found in tap, faucet, sanitary controlling system, regulator, diverter, water pump.  Each time you use the devices, two discs ( rotor and stator)  control water, beverages, oil flow by gliding back and forth in an airtight seal that prevents leaking and ensures a super smooth operation.
The sliding surface of the ceramic sealing disk is extremely smooth and almost as hard as diamonds. These durable valves are unaffected by temperature extremes, sand, rust, and severe water conditions.
As ceramic seal disk is a key component in water, oil, gas sealing system, we always ensure that we manufacture best-quality products through strict quality control in every process, we introduced KPI into our manufacturing flow chart and keep all batches with consistent dimensions. 
With over 15 years of manufacturing experience for ceramic seal discs, we have been supplying a variety of standard components, also we support various customized needs per your technical drawings, specification or practical samples.
Application of ceramic seal disk:
Ceramic seal discs are widely used in a variety of water faucet, water tap, sanitary sealing system, regulating system,  sealing valves, water /oil/gas pump and so on.

Datasheet of technical ceramic seals

Property Units Materials
99.5%Al2O3 99%Al2O3 95%Al2O3 ZrO2 Si3N4
Density g/cm3 ≥3.85 ≥3.80 ≥3.60 ≥6.0 ≥3.2
Water absorption % 0 0 0 0 0
Hardness HV 1700 1700 1500 1300 1550
Flexural strength Mpa ≥379 ≥338 ≥320 ≥1200 ≥600
Compressive strength Mpa ≥2240 ≥2240 ≥2000 ≥1990 ≥2500
Fracture toughness Mpa m1/2 4-5 4-5 3-4 6.5-8 6
Max. service temperature
1675 1600 1500 1000 1200
CTE (20-800℃) 1×10 -6 /℃ 6.5~8.0 6.2~8.0 5.0~8.0 8.0~9.5 3.1
Thermal shock T(℃) ≥250 ≥200 ≥220 ≥300 ≤1000
Thermal conductivity(25℃) W/m.k 30 29 24 3 15~20
Volume resistivity (25℃ ) >1 x 10 14 >1 x 10 14 >1 x 10 14 >1 x 10 11 >1 x 10 12
Insulation strength KV/mm 19 18 18 17  
Dielectric constant(1Mhz) (E) 9.7 9.5 9.5 29  

Packaging proposal and transportation solutions

1. We will keep the ceramic parts inside the inner package to be fixed without moving, then it will prevent them from collision each other, to avoid any cause any chippings during transportation.

2. In addition, the inside of the outer carton will be filled with sufficient protective kinds of stuff.


Al2O3 Ceramic Seals , Alumina Ceramic Disc Strong Acid Alkali Resistant Fine Grinding 0

Why choose us?

★ 10+ Years of manufacturing experience in OEM, ODM                        ★ Powerful R&D, mass production capability
★ In-house comprehensive manufacturing types of equipment               ★ Rigorous quality control system and processes
★ Surpassing pre-sales and after-sales service                                       ★ Abide all orders as the first priority



Q1. Are you a factory or trading company?
A: We are a manufacturer. You are welcome to visit our factory.
Q2: Do you send a sample to check?
A: Sure, the sample is free and freight collect.
Q3: When will you ship it?
A: If the products are in storage, we'll ship within 48 hours
Q4: When can I get the price?
A: We regularly quote within 24 hours after we get your inquiry. If you are in urgent need of getting the price.
Please call us or tell us in your email so that we will proceed with your inquiry as a priority.
Q5: Is it available to provide customized products?
A: We always support custom-made demand as per different materials, dimensions, and designs.
Q6: How to ensure quality?
A: The dimension out of any batch will be carried out sampling inspection per international AQL standard. A 100% cosmetic inspection will be done.
Q7: What other products are you dealing with?
A: We focus on a variety of ceramic tubes, ceramic substrates, ceramic sheets, textile ceramics besides metalized ceramics.


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