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 kind of seal is the dust sealing ring?
Role of dust ringDust seal is very important for the protection of some hydraulic equipment. If the hydraulic equipment into a number of dust, not only will wear to the seal, but also for some guide sleeve and piston rod wear is more serious. In addition, if these impurities into the hydraulic medium, the operation of the valve will also have a certain impact on the pump function, and if the situation is worse, a lot of damage to these devices may. After using the dustproof ring, the dust and sundries of the wheat on the piston rod can be effectively removed, but the oil film on the upper part can not hurt any more, and is beneficial to the lubrication of the sealing element.
Q:Is polyurethane TPV suitable for sealing products?
The needle, stopper, bottle, Straw, casing and other soft parts;7 、 flashlight shell, children's toys, toy tires, golf bags, all kinds of grips, etc..- electronic appliances1. All kinds of earphone wire, earphone wire connector;2, mine cable, numerical control coaxial cable, ordinary and high-grade wire and cable insulation layer and sheath;3 、 power socket, plug and sheath etc.;
Q:500 degree high temperature rubber sealing strip
For high and low temperature parts, insulation, pipe joints, etc.. Fluorine rubber - using the upper temperature limit of 300 degrees for chemical lining, advanced seals, high vacuum adhesive and so on.More than 500 degrees of high temperature, should have melted, can not be sealed role.
Q:Classification of the use of seals
The seal according to the shape and material type, sealing structure, sealing mechanism, classification of seal for packing into the packing cavity after the gland axial compression on it (see figure 29.5-9), when the filler and relative motion, because the plastic filler to produce a radial force, and close contact with the axis. At the same time, the lubricant impregnated in the packing is extruded and an oil film is formed between the contact surfaces. Because the contact state is not uniform, the contact parts will appear the boundary lubrication condition, known as the "bearing effect"; the concave without contact to form a small oil tank, oil film thickness, contact and non-contact parts of an irregular maze, preventing the liquid leakage flow this effect, called "labyrinth effect". This is the mechanism of packing seal. Obviously, the good seal is to maintain the "bearing effect" and "labyrinth effect"". That is to say, to maintain good lubrication and proper compression. If the lubrication is bad or pressed too tight, the oil film will be interrupted, resulting in dry friction between the packing and shaft, and finally lead to burning shaft and serious wear and tear. To this end, often on the packing pressing degree of adjustment, so as to fill in the lubricant after running for a period of time loss, and then squeezed out some lubricant, pressing force relaxation while compensating for volume changes caused by filling.
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:In the seal of hydraulic cylinder, the O-ring and Y ring are sealed well
Can not simply say that the good sealing and badAs long as the pressure reaches the sealing ring value, the seal is normal. Each has its own merits。
Q:What are the equipment needed to produce the sealing ring?
It's easy to see things done by others, but when you really get into it, it's not the case. You don't know about the multi-level sealing ring is what is known as the king of PTFE tetrafluoroethylene, plastic. Are you going to make a vinyl sealing ring?
Q:What is the operation of the seal company sulfur chemical?What is the specific work? Is there any danger and harm?
Then there is vulcanizing machine is generally heating, pressure equipment, vulcanizing board temperature is higher, easy to scald. So be careful in operation
Q:What rubber kind of rubber does the brake seal of the car use?
Because he is the first production. He asked me. I told him that the first, customer is the name of 15 years ago called, because at that time the brake is so called castor oil, brake oil, castor oil, brake is sensitive enough, the driver should step down to stop with great force, so come now the
Q:How about the sealing ring for the piston rod seal?
The sealing structure and sealing ring of piston rod is the key component in the reciprocating actuating mechanism. It is not only related to leakage problems, but also will affect the performance of the entire machine equipment and life. The piston rod in the reciprocating actuator, mainly to bear a certain axial force, and at a certain speed reciprocating movement to external work. With the development of science and technology and industry, the requirement of reciprocating motion is higher and higher. Especially in the case of high pressure and high speed movement, the problem of sealing structure and sealing ring of piston rod is particularly important.

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