Well Resistance Precision Polished Alumina Ceramic Sealing Discs
for Pump Seal
Specification and ceramic sealing disc
1. Material options: 96% alumina, 99% alumina, silicon carbide
(SiO2) and Silicon nitride (Si3N4)
2. Working surface roughness: fine polishing better than Ra0.3,
diamond polishing better than Ra0.1
3. Dimension: the max. outer diameter up to 50mm
4. Other parameters: flatness to be 0.002mm, perpendicularity:
0.005mm, Parallelism : 0.002mm
4. Nominal tolerance: size less than 10mm with 0.10mm, size over
than 10mm with 1% of dimensions
5. Precision process available: polishing, fine grinding, CNC
machining
Prime benefit of the ceramic sealing disc
1. Great mechanical properties, hardness, compressive and flexural
strength
2. Excellent wear-resistance, over 276 times than stainless steel
3. Exceptional hardness, the hardness is up to 1700MPa
4. Chemical stability, resistant most of strong acid and alkali
5. Perfect surface contact area ratio: the value can ensure between
60 ~ 80%
6. Precise and consistent dimensions every batch via fine grinding
7. Eco-friendly and safe, the material meets FDA, LFGB completely
Description of the ceramic sealing disc
High purity alumina ceramic sealing disc for the pump seal has been
recognized for its safe, outstanding properties and precise
operation, thereby creating a perfect sealing effect. Furthermore,
aluminum oxide ceramic (alumina) is a very cost-effective material,
so alumina ceramic sealing discs have been widely used. With
comparison with traditional seal disc, it can work smoothly even if
after 500,000 cycles or higher due to its unmatched wear resistance
and exceptional mechanical strength.
As the ceramic sealing disc is a key component in oil, water, 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 sealing
discs, we have been supplying a variety of standard components,
also we support various customized needs per your technical
drawings, specification or practical samples.
If you are looking for a quality manufacturer for ceramic sealing
discs, please get through with us. We do believe you will find it's
a wise choice.
Application of ceramic sealing disc:
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 (Non-loading) | ℃ | 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℃ ) | ohm.cm | ＞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.
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
FAQ
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.
