Carbon Seal
Graphite is an isoform of element carbon. In 1971, the United States studied the successful flexible graphite sealing material, which solved the leakage of atomic energy valve. After deep processing, the flexible graphite becomes an excellent sealing material, which are made into various carbon mechanical seals with the effect of sealing components. These carbon mechanical seals are used in chemical, petroleum, electric power industries such as high temperature fluid seal.
Because the flexible graphite is formed by the expansion of expanded graphite after high temperature, the amount of intercalating agent remaining in the flexible graphite is very small, but not completely, so the existence and composition of the intercalation agent have a great influence on the quality and performance of the product.
The original inventor used concentrated sulfuric acid as oxidant and intercalating agent. However, after being applied to the seal of a metal component, a small amount of sulfur remaining in the flexible graphite was found to corrode the contact metal after long term use. In view of this point, some domestic scholars have tried to improve it, such as Song Kemin who choosed acetic acid and organic acid instead of sulfuric acid. acid, slow in nitric acid, and lower the temperature to room temperature, made from a mixture of nitric acid and acetic acid. By using the mixture of nitric acid and acetic acid as the inserting agent, the sulfur free expanded graphite was prepared with potassium permanganate as oxidant, and acetic acid was slowly added to nitric acid. The temperature is reduced to room temperature, and the mixture of nitric acid and acetic acid is made. Then the natural flake graphite and potassium permanganate are added to this mixture. Under constant stirring, the temperature is 30 C. After reaction 40min, the water is washed to neutral and dried at 50~60 C, and the expanded graphite is made after high temperature expansion. This method achieves no vulcanization under the condition that the product can reach a certain volume of expansion, so as to achieve a relatively stable nature of the sealing material.
Sealcon can produce different carbon ring seals according to different customers’ requirement.
model |
M190T |
M106K |
M180K |
M106D |
M160C |
M160B |
material |
pure graphite |
furan resin |
furan resin |
antimony carbon |
copper alloy |
Babbitt alloy |
density (g/cm3) |
||||||
Fractural strength (MPa) |
100 |
65 |
80 |
65 |
80 |
65 |
compressive strength (MPa) |
250 |
230 |
240 |
200 |
250 |
160 |
Shaw hardness |
92 |
90 |
90 |
80 |
75 |
60 |
porosity (%) |
2 |
8 |
||||
Coefficient of heat expansion (1/℃) |
6 |
|||||
temperature (℃) |
600 |
210 |
210 |
350 |
350 |
200 |
medium |
concentration% |
pure graphite |
furan resin |
antimony |
copper alloy |
Babbitt alloy |
hydrochloric acid |
36 |
+ |
0 |
- |
- |
- |
sulfuric acid |
50 |
+ |
0 |
- |
- |
- |
sulfuric acid |
98 |
+ |
+ |
- |
- |
- |
nitric acid |
50 |
+ |
0 |
- |
- |
- |
nitric acid |
strong |
- |
- |
- |
- |
|
hydrofluoric acid |
40 |
+ |
0 |
- |
- |
- |
phosphoric acid |
85 |
+ |
+ |
- |
- |
- |
chromic acid |
10 |
+ |
0 |
- |
- |
- |
acetic acid |
36 |
+ |
0 |
- |
- |
- |
sodium hydroxide |
50 |
+ |
+ |
- |
- |
+ |
potassium hydroxide |
50 |
+ |
0 |
- |
- |
+ |
sea water |
+ |
+ |
+ |
+ |
+ |
|
benzene |
100 |
+ |
0 |
+ |
+ |
- |
ammonia |
10 |
+ |
+ |
+ |
+ |
- |
acetone |
100 |
+ |
+ |
+ |
0 |
+ |
carbamide |
+ |
+ |
+ |
0 |
- |
|
carbon tetrachloride |
+ |
+ |
+ |
+ |
+ |
|
oil |
+ |
+ |
+ |
+ |
+ |
|
gasoline |
+ |
+ |
+ |
+ |
+ |
Sealconis carbon seal ring manufacturer,we provide carbon mechanical seal,mechanical carbon seal,carbon seal material,carbon shaft seal,supplier sealand carbon ring seal,RFQ today!
Send product request
Other supplier products
Flygt Mechanical Seals FOL-45 | Replacement for: FOL 45lower parts for flygt 3140, 3152 pump FOL-45 lower parts for flygt 4650, flygt 4660pump FOL-45 lower parts for flygt 2201... | |
Flygt Mechanical Seals FBU-28 | Replacement for: FBU-28 upper parts for flygt 3101pump Features: Original Sweden design Big stock Wilo pumps ITT pumps Flygt Pump Model of... | |
Double Cartridge Mechanical Seals | Cartridge mechanical seal is the rotary ring, stationary ring, spring, auxiliary seal, bushings, glands, Gasket and static seal, total 7 components... | |
Double Cartridge Mechanical Seal for Sale | Cartridge mechanical seal is the rotary ring, stationary ring, spring, auxiliary seal, bushings, glands, Gasket and static seal, total 7 components... | |
METAL BELLOW MECHANICAL SEALS | Metal Bellow seals are ideal for high temperature applications and harsh chemical services where elastomers cannot be used effectively. This seal t... |
Same products
China made Drive end bearing HPT for steam turbine | Seller: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD | "China made Drive end bearing HPT for steam turbineOur company mainly serves thermal power plants... | |
JOYSTAR's Steam Sterilizer And Dryer List | Seller: JOYSTAR ELECTRICAL APPLIANCES MANUFACTURING CO.,LTD. | Our exclusive designed bottle rack guides the Steam Sterilisers and hot air straight into the bot... | |
JOYSTAR Electric Kettle For Baby Formula | Seller: JOYSTAR ELECTRICAL APPLIANCES MANUFACTURING CO.,LTD. | milk electric kettle For Baby Formula can keep warm all day and night until you dry out, so you c... | |
JOYSTAR Baby Food Maker And Steamer List | Seller: JOYSTAR ELECTRICAL APPLIANCES MANUFACTURING CO.,LTD. | A Baby Food Maker And Steamer is designed to help the mother with making baby food faster and eas... | |
JOYSTAR Baby Food Cooker List | Seller: JOYSTAR ELECTRICAL APPLIANCES MANUFACTURING CO.,LTD. | The most important thing is to make sure the food is well prepared to make it easy for the baby t... |