Silicon Nitride Sealing Ring Si3N4 Seal Ring

Silicon nitride sealing ring is a kind of seal that made of silicon nitride ceramic, with high temperature and thermal shock resistance, good wear resistance, corrosion resistance, it is widely used in various mechanical equipment and pipeline joints, to prevent gas or liquid leakage.

Brand:
ATCERA
Item NO.:
AT-DHG-MF001

Materials
Si3N4
Shapes
Ring , Mechanical Parts
Applications
Mechanical Parts , Petrochemical Industry , Metallurgy Industry

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Properties of Silicon Nitride Sealing Ring

Silicon nitride ceramic has good chemical corrosion resistance, high strength, high hardness, good wear resistance, high temperature resistance, and small thermal expansion coefficient and friction coefficient.

1. Good corrosion resistance

The silicon nitride seal ring is resistant to acid, alkali and other chemicals, and can be applied to a variety of corrosive media in the environment;

2. Good wear resistance

Silicon nitride seal ring material has high hardness, wear resistance is good, and service life is long;

3. High temperature resistance

Silicon nitride seal ring has good high temperature resistance, the highest use temperature can reach up to 1300℃;

4. Low thermal expansion coefficient

Thermal expansion coefficient of silicon nitride is small, and SiC sealing ring can adapt to a very wide operating temperature range, low temperature does not affect the sealing effect, and expansion stress under high temperature is small.

Applications of Si₃N₄ Seal Ring

Silicon nitride sealing ring is mainly used to prevent water, oil, chemicals or gas leakage, or dust, air and other matters getting inside to the equipment. It's widely used in connection part of pipelines, pumps, valves and other equipment, end face or entrance of sealing containers or equipment, as well as the bearing sides of the drive shaft, the sealing effect is good, and replacement cycle is long.

1. Chemical equipment

Silicon nitride seal ring has good corrosion resistance, performance is not affected by acid, alkali and other chemicals, can be used in a variety of chemical equipment;

2. Mining and engineering machinery

Silicon nitride sealing ring material high hardness, good wear resistance, and high compressive strength, can be used for high load, high dust environment, replacement cycle is long;

3. Metal smelting furnace and other high temperature equipment

The silicon nitride sealing ring has good high temperature resistance, thermal expansion is small and thermal stress to equipment is small, which can effectively ensure the reliability of the equipment.

Size Chart of Si₃N₄ Seal Ring

We are committed to delivering prime silicon nitride seal ring tailored to your exact specifications. Our dedicated team ensures meticulous adherence to your instructions, striving to exceed customer expectations. Additionally, we offer the flexibility of customized sizes to accommodate your unique requirements.

The requirements below shall be provided if customized design request.

1. Use environment, working temperature;

2. Size and tolerance requirements of outer diameter, inner diameter and thickness;

3. Drawings and specifications requirements.

Machining Tolerance:

1. Diameter: ±0.01mm

2. Hole Depth: ±0.005mm

33. Surfance Roughness:Ra0.5

4. Cylindricity: ±0.004mm

5. Concentricity: ±0.003mm

6. Parallelism: ±0.002mm

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Drawing of Si3N4 Seal Ring

Si₃N₄ Seal Ring
Item No.	External Diameter (mm)	Inner Diameter (mm)	Thickness (mm)
AT-DHG-MF001	10.0	5.0	2.5
AT-DHG-MF002	15.0	9.0	3.0
AT-DHG-MF003	20.0	12.9	3.5
AT-DHG-MF004	25.0	15.0	2.0
AT-DHG-MF005	28.0	20.0	2.5
AT-DHG-MF006	31.0	25.0	3.0
AT-DHG-MF007	36.5	27.0	4.5
AT-DHG-MF008	48.0	38.0	4.8
AT-DHG-MF009	50.0	39.0	5.0
AT-DHG-MF010	50.0	40.0	5.0
AT-DHG-MF011	50.0	38.5	5.5
AT-DHG-MF012	50.0	30.0	10.0
AT-DHG-MF013	51.0	40.5	5.1
AT-DHG-MF014	55.5	51.5	2.0
AT-DHG-MF015	62.0	51.0	5.5
AT-DHG-MF016	65.0	53.8	5.5
AT-DHG-MF017	68.0	57.0	5.5
AT-DHG-MF018	90.0	18.0	6.0
AT-DHG-MF019	102.0	63.0	19.4
AT-DHG-MF020	120.0	112.8	8.5
AT-DHG-MF021	1~150	0.5~140	0.25~50

Technical Data of Silicon Nitride Materials

Si3N4 Type	Gas pressure sintering Si3N4	Hot pressing sintering Si3N4
Density (g/cm³)	3.2	3.3
Flexture strength (MPa)	700	900
Young Modulus (GPa)	300	300
Poisson's ratio	0.25	0.28
Compressive strength (MPa)	2500	3000
Hardness (GPa)	15	16
Fracture toughness (MPa*m^1/2)	5~7	6~8
Maximum working temperature (℃)	1100	1300
Thermal conductivity (W/m*K)	20	25
Thermal expansion coefficient (/℃)	3*10^-6	3.1*10^-6
Thermal shock resistance (ΔT ℃)	550	800

*This chart illustrates the standard characteristics of the silicon nitride materials commonly employed in the manufacturing of our Si₃N₄ products and parts. Please be aware that the attributes of customized silicon nitride products and parts may vary depending on the specific processes involved. Detailed parameter is decided by type and composition of stabilizing agent.

Usage Instructions

1. Select the appropriate silicon nitride seal ring according to the design size and working environment, so as to avoid premature aging of the seal ring and reduce the service life of the seal ring;

2. Clean the dust and impurities of the silicon nitride seal ring and the mating surface before installation, to ensure the service life of the silicon nitride seal;

3. Install the sealing ring in the correct direction, so as not to cause poor sealing effect;

4. The ambient temperature of the silicon nitride seal ring should not exceed the maximum use temperature, if the temperature is too high, it will cause the aging of the seal and reduce the service life of the seal ring.

Valuable Information

Si₃N₄ Seal Ring Packing

Silicon nitride seal rings are carefully packaged in appropriate containers to avoid any potential damage.

Customization Advantages

1. According to your application scenario, analyze the needs, choose the appropriate material and processing plan.

2. Professional team, quick response, can provide solutions and quotations within 24 hours after confirming the demand.

3. Flexible business cooperation mechanism, support at least one piece of quantity customization.

4. Quickly provide samples and test reports to confirm that the product meets your needs.

5. Provide product use and maintenance suggestions to reduce your cost of use.

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FAQ

Do you supply the materials unlisted on your website?

Although our primary focus is on advanced ceramic materials such as alumina, zirconia, silicon carbide, silicon nitride, aluminum nitride, and quartz ceramics, we are always exploring new materials and technologies. If you have a specific material requirement, please contact us, and we will do our best to fulfill your needs or find suitable partners.

Can you aid in material selection & ceramic product design?

Absolutely. Our technical team possesses profound knowledge of ceramic materials and extensive experience in product design. We are happy to provide you with material selection advice and product design support to ensure optimal performance for your products.

Do you have a minimum order value requirement?

We do not have a fixed minimum order value requirement. We always focus on meeting our customers' needs, and we strive to provide quality service and products regardless of the order size.

What services beyond ceramic products do you offer?

In addition to ceramic products, we also provide a range of additional services, including but not limited to: customized ceramic processing services based on your needs, using blanks or semi-finished blanks produced by yourself; if you are interested in outsourced ceramic packaging and metallization services, please contact us for further discussion. We are always committed to providing you with a one-stop solution to meet your various needs.

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Yes, we do. No matter where you are located globally, we can ensure the safe and timely delivery of your order.

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