SSIC silicon carbide sealing ring

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Special ceramics: Special ceramics

Product Description:

SSIC  silicon carbide sealing ring

SSIC  silicon carbide sealing ring

SSIC  silicon carbide sealing ring

SSIC  silicon carbide sealing ring

SSIC  silicon carbide sealing ring

SSIC  silicon carbide sealing ring


Silicon carbide seal rings Definition - silicon carbide material, depending on the process, after a certain production methods, the production of a silicon carbide products. Its purpose - use is quite extensive, a variety of mechanical products can be applied to, depending on the specifications, the production of different types of products, and ultimately to play a role in sealing. How to develop silicon carbide seal ring market - depending on the product positioning market, according to market distribution brand. Prospects silicon carbide seal ring - prospects for development is still quite widely, in general, based on the current process, innovation, products more promising.

Feature

1. plasticity - as long as the silicon carbide material has a certain process, it may be compressed into various shapes of blank, then a second and can be processed, shaped into products that customers need.

2. corrosion resistance - silicon carbide seal ring may be in the acid environment, the sealing effect is not reduced.

3. abrasion resistance - silicon carbide seal ring through a certain finishing process, so to achieve high-precision flat and smooth, plus the wear resistance of silicon carbide, silicon carbide seal ring so you can use mutual friction. In high-temperature performance, wear performance is not reduced.

4. High temperature resistance - due to the material properties of silicon carbide, silicon carbide seal ring and therefore has a high temperature resistance, depending on the process, high temperature performance is not the same. The reaction sintered silicon carbide seal ring can be used at 1300 degrees without pressure sintered silicon carbide seal ring can reach 1600 degrees.

Here are some of the pressure sintered silicon carbide products, physical and chemical parameters:

 

medium

content

Causticity

Atmospheric SIC

The reaction SIC

WC

WC

AL2O3

ZrO2

Si3N4

stainless steel

steel

HNO3 nitric acid

50%

A

A

C

A

A

C

C

C

Hydrochloric acid HCI

35%

A

A

C

A

A

C

C

A

Sulfuric acid H2SO4

98%

A

A

C

A

A

C

C

A

Hydrofluoric acid HFF

40%

A

C

C

C

C

C

C

C

Phosphoric acid H5PO4 215OC

85%

C

C

C

C

C

C

C

C

HNO3+HF

20%+5%

A

C

C

C

C

C

C

C

Sodium chlorate NaCIO

10%

A

B

C

A

A

A

C

A

Sodium hydroxide NaOHH

50%

A

C

A

B

A

B

A

A

Potassium hydroxide KOH


A

C

A

B

A

B

A

A

Acetic acid CH3COOHH

80%

A

A

C

A

A

C

C

C

Sodium sulfate + Na2CO3 + H2SO4 925OC

 


A

A

C

A

A

C

C

B

Silica solution SIO2

 


B

C

C

C

C

C



Assessment Method: the specimen prior polishing, immersed in the test liquid (70OC) for 100 hours, the weight was measured and observed microstructure, weight reduction is calculated by the degree of corrosion was observed microstructure for corrosion to comprehensive judgments.

A level (corrosion): corrosion rate ≤0.125mm / ingredients in a small amount of corrosion observed slice

Level B (somewhat resistant): corrosion rate = 0.125-1.0mm / or annual corrosion rate ≤0.125mm / observe a large number of corrosion

Class C (resistant to corrosion): corrosion rate ≥1.0mm / or the main ingredient of Corrosion

 Silicon carbide performance indicators

Index Name

 

Atmospheric SiC

Reaction Bonded Silicon Carbide

Purity (%) of silicon carbide

> 97

>90

Density (g / cm)

3.06-3.15

>3.05

Particle size (um)

0.5-0.7

8-20

Hardness (HRA)

≥90

≥90

Flexural Strength (MPa)

400-580

350-450

Compressive strength (MPa)

3900

>2500

Fracture Strength (MPa)

3.05-4.6

4.3

Elastic Modulus (GPa)

380-410

420

Thermal conductivity

102.6

35-110

Coefficient of thermal expansion (1 / ℃)

4.02×10

4.3×10

Poisson's ratio

0.14

0.15

 


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Q:What's the function of the sealing ring?
Composition of mechanical sealMechanical seals are mainly composed of the following four components. 1. Main seals: moving ring and stationary ring. 2. Auxiliary sealing parts: sealing ring. 3, pressing parts: spring, push ring. 4, transmission parts: play skip and key or fixed screw.
Q:Why is there no decent seal for domestic oil seals? What time can Chinese manufacturing resurgence?
Ha-ha! In fact, there are also good domestic, but you did not find it, to find a good supplier, you do this line for many years? Is that all right? Do you know any big manufacturers in China? Such as: manufacturers of PTFE, rubber manufacturers, polyurethane manufacturers, you may have been looking for those family workshops
Q:How to choose the sealing ring according to the shaft?
According to the installation form can be divided into radial installation and axial installation. Therefore, the selection of sealing ring specifications depends on the specific circumstances. For example, for static seals, H8/f7 tolerances can be used. Please choose the O type pressure ring deformation of large size as far as possible.
Q:What are the common sealing forms of hydraulic cylinders?
The common sealing forms include clearance seal, friction ring seal and sealing ring seal. 1, the gap seal to rely on the relative movement of the small gap between the surface to prevent leakage. In order to improve the sealing capacity of the device, several small annular grooves are often made on the surface of the piston to increase the resistance of the oil through clearance. It has the advantages of simple structure, small frictional resistance, resistant to high temperature, but the leakage of large, high processing requirements, can not restore the original capacity after abrasion is only used in small size, low pressure, high speed of relative movement between the cylinder and the piston.
Q:Men's motorcycle front left shock absorber oil leakage, do not change two seals?
Motorcycle front shock absorber oil leakage, usually due to shock absorber oil seal caused by oil leakage, it is possible to replace the oil seal,
Q:Seal manufacturers as agents, how about money?
The outlook is good, considering whether it is just a question of need, the size of your market. Gasket, packing manufacturer
Q:How to choose the sealing ring material, sealing ring of different materials, what is the difference?
Insulation performance,butSILSilicone rubber sealing ring tensile strength than general rubber poor, and no oil resistanceSIL;The silicon rubber sealing ring is suitable for household electricityAppliances such as electric water heaters, electric irons, microwave ovens, etc.,
Q:What are the seals commonly used in the industry?
In recent years, the production and quality of rubber seal products in China have gradually entered a new stage and new period. However, only these can not satisfy the need of the development of other industries of various types of rubber seal products standardization and serialization of products, especially compared with the international advanced countries, our products in terms of product quality, or product varieties, has a considerable gap. The 100 forum focuses on the concept, seal the research content and research significance, summarizes the current situation of rubber seal, mechanical seal and packing seal technology, analysis of China's and the world advanced sealing technology in developed countries at the level of research and development ability of the new products on the gap, and our future focus on the seal the field of research and put forward some suggestions.The overall competitiveness of China's sealing industry is not strongAs we all know, in our country, the sealing industry can be regarded as the smallest industry, but the products can be used in conjunction with large industries. No matter aviation, navigation, petroleum, chemical industry, or machinery, power generation, metallurgy, mines, etc., are inseparable from the seals. In short, all organic, pump, pipe, valve places are dependent on the seal. Therefore, the industry is small, involving a wide range of faces.
Q:Silicone seals should pay attention to what storage?
Do not open the sealing package when using, avoiding dirt sticking on the seal or scratching the seal.3, storage of non packaged products, do not stick or bring impurities, according to the original state of storage.
Q:What's the difference between the sealing ring shaft and the bore?
There is a very simple way, you see the seal specifications can know, generally speaking, such as diameter, x, diameter, X-ray diameter (16x23.3x3.2), the first to write the internal diameter is the axis, and conversely, the outer diameter x diameter, X-ray diameter is the axis!

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