High Hardness Wear Resistance Technical Silicon Carbide SiC Ceramic valve Seat
Prime benefit of the SiC ceramic valve seat
1. Exceptional hardness, the physical hardness is up to 2500MPa
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. Perfect sliding surface quality: diamond-like surface, the roughness to be Ra0.1
5. High-temperature resistance, stand with over 1600ºC free of deformation
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
The specification of the ceramic seal valve seat
| Available materials |
Silicon carbide (SiC2), 95%, 99%, 99.5% alumina, and Silicon nitride (Si3N4) |
| Roughness |
Fine polishing better than Ra0.3, diamond polishing better than Ra0.1 |
| Dimension |
The max. outer diameter up to 200mm |
| 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 |
Description of the SiC ceramic valve seat
Silicon carbide (SiC) is in the same family of technical ceramics, but SiC ceramic has much better hardness and lubrication than other ones. There are 2 types of silicon carbide, the one is directly sintered silicon carbide(SSiC), another one is reaction-bonded silicon carbide(RBSiC) . SSiC can withstand higher temperature and pressure than RBSiC. Besides, Silicon carbide offers superb wear resistance, chemical stability, it's an ideal choice for ceramic seals in the sealing system.
The ceramic seal ring 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.
We offer a variety of customized and standard seal ceramic rings from prototyping to massive production. All these ceramic seal rings are widely used in a different water pump, gas & oil production, chemical & petrochemical, refinery, power, pharmaceutical, and so on.
The gallery of ceramic seals
Remark:
We produce a variety of technical ceramic seals in different materials, also different types of ceramic seals, including ceramic sealing disc, ceramic seal ring, ceramic seat, ceramic ball valve.
Technical Datasheet of the ceramic sealing disc
| Property |
Units |
Materials |
| 99.5%Al2O3 |
99%Al2O3 |
95%Al2O3 |
SiC |
Si3N4 |
| Density |
g/cm3 |
≥3.85 |
≥3.80 |
≥3.60 |
≥3.21 |
≥3.2 |
| Water absorption |
% |
0 |
0 |
0 |
0 |
0 |
| Hardness |
HV |
1700 |
1700 |
1500 |
2500 |
1550 |
| Flexural strength |
Mpa |
≥379 |
≥338 |
≥320 |
≥550 |
≥600 |
| Compressive strength |
Mpa |
≥2240 |
≥2240 |
≥2000 |
≥3306 |
≥2500 |
| Fracture toughness |
Mpa m1/2 |
4-5 |
4-5 |
3-4 |
3 |
6 |
Max. service temperature
(Non-loading) |
ºC |
1675 |
1600 |
1500 |
1600 |
1200 |
| CTE (20-800ºC) |
1×10 -6 /ºC |
6.5~8.0 |
6.2~8.0 |
5.0~8.0 |
3.7~4 |
3.1 |
| Thermal shock |
T(ºC) |
≥250 |
≥200 |
≥220 |
------ |
≤1000 |
| Thermal conductivity(25ºC) |
W/m.k |
30 |
29 |
24 |
150 |
15~20 |
| Volume resistivity (25ºC ) |
ohm.cm |
>1 x 10 14 |
>1 x 10 14 |
>1 x 10 14 |
>1 x 10 5 |
>1 x 10 12 |
| Insulation strength |
KV/mm |
19 |
18 |
18 |
------- |
------- |
| Dielectric constant(1Mhz) |
(E) |
9.7 |
9.5 |
9.5 |
------- |
-------- |
Our advantage and strength
1. 10+ Years of manufacturing experience in OEM, ODM and trusted & professional teams
2. Powerful R&D, prototyping & mass production capability to support trial order and high volume production
3. In-house comprehensive manufacturing types of equipment from raw materials to high precision machining
4. Rigorous quality control system and processes, including IQC, IPQC, QA, OQC in working instructions
5. Surpassing pre-sales, sales, and after-sales service, abide all orders every customer as the first priority
FAQs (Frequently Asked Questions)
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.
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