China Ceramic Alumina Tube manufacturer

Diamond Polished SiC Ceramic Seals Ra 0.1 Roughness Surface For Pump

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: SiC Ceramic Seal Ring Material: Silicon Nitride
Type: Ceramic Ring Color: Black
Size: OD Is Up To 300mm Feature: High Temperature Resistance
Tolerance: As Design Drawing Or OEM Shape: Customized Designs
Surface Treatment: Diamond-polished Application: Ceramic Seal Ring For For Pump Sealing
High Light:

alumina ceramic disc


carbon ceramic mechanical seal

Product Description

Custom Diamond Polished SiC Silicon Carbide Ceramic Seal Ring for Pump

Main features of the SiC ceramic seal ring

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 1600℃ 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

Specification of the SiC ceramic seal ring

Available materials Silicon carbide (SiO2), 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 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



Description of the Silicon carbide ceramic seal ring

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.Diamond Polished SiC Ceramic Seals Ra 0.1 Roughness Surface For Pump 0

Datasheet of technical ceramic seals

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
1675 1600 1500 1600 1200
CTE (20-800℃) 1×10 -6 /℃ 6.5~8.0 6.2~8.0 5.0~8.0 3.7~4 3.1
Thermal shock T(℃) ≥250 ≥200 ≥220    ------ ≤1000
Thermal conductivity(25℃) W/m.k 30 29 24 150 15~20
Volume resistivity (25℃ ) >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   -------     --------

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.


Diamond Polished SiC Ceramic Seals Ra 0.1 Roughness Surface For Pump 1

Why choose us?

★ 1 0+ 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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