High Precision Diamond Polished 99% 99.5% 99.8% Alumina Ceramic
Seal Face
Specification of the ceramic seal face
| Materials options | High purity alumina(Al2O3), Zirconia (ZrO2),silicon carbide (SiO2) |
| 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 face
1. Perfect sliding surface quality: diamond-like surface, the
roughness to be Ra0.1
2. Superb chemical stability against hot strong acid and alkali and
free of rust forever
3. Excellent wear-resistance and abrasion resistance, over 276
times than stainless steel
4. High-temperature resistance, stand with over 1500℃ free of
deformation
5. Exceptional hardness, the physical hardness is up to 1700MPa
6. Great mechanical properties, hardness, compressive and flexural
strength
7. Precise and consistent dimensions every batch via fine grinding,
CNC machining
8. Eco-friendly and safe, the material meets FDA, LFGB completely
9.Stable breaking strength, and less variance in figure or
dimension
Description of the ceramic seal face
Alumina ceramic seal face is characterized by its extremely high
strength, wear resistance, low friction, and chemical stability.
The outstanding surface quality (diamond polished surface )on both
sides makes it sealing performance as desired. Due to alumina's
versatile features, alumina ceramic seal ring could work with
various severe service environments well, even if under hot strong
acid and alkali, high temperature, high pressure, high voltage /
current status. It has a super long service cycle in comparison
with metal mechanical seals and reduces the time of maintenance
The ceramic seal face plays a key role 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 seals,
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 seals:
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.
