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 thesealing material.
Sealcon can produce differentsaccording to different customers’ requirement.
+ stable - unstable 0 middle (between stable and unstable)
Tag:Mechanical Seals
Send product request
Other supplier products
 |
SEAL SPARE PARTS | SEAL SPARE PARTS Sealcon supplies a series of pump mechanical seal parts, which are developed and manufactured by using the latest technology. All... |
 |
Ceramic Seal | Ceramic material refers to inorganic non-metallic materials made of natural or synthetic compounds through forming and sintering. It has the advant... |
 |
Coke Dry Quenching Rotary Seal Valve | Coke dry quenching is a kind of coke quenching method using inert gas to cool the red coke. During the dry quenching process, the red coke is loade... |
 |
Seal Spare Parts Sealing Rings | Seal Spare Parts Sealing Rings Brief Introduction of Sealing Rings The seal ring is a ring seal with the notch, it is placed in the ring groove o... |
 |
MECHANICAL SEALS FOR PUMP | Mechanical seal for pump is a kind of dynamic seal assembly, which is widely used on the rotating shaft. It is also known as the end seal. Consisti... |
Same products
 |
FKM RUBBER O RING | Seller: Xingtai Oubei rubber & Plastic products Co., LTD | FKM RUBBER O RING Benefits High Temperature Stability Capable of continuous operation up t... |
 |
Water Seal，Oil Seal | Seller: Xingtai Oubei rubber & Plastic products Co., LTD | Water Seal，Oil Seal If you're experiencing leaks in your Samsung or LG washing machine, the ... |
 |
Ec End Cap Covers Oil Seals | Seller: Xingtai Oubei rubber & Plastic products Co., LTD | Ec End Cap Covers Oil Seals Product use: mainly used in construction machinery, injection ... |
 |
o rings manufacturer | Seller: Xingtai Oubei rubber & Plastic products Co., LTD | o rings manufacturer O-RINGS & O-RING SETS At , we offer a comprehensive range of O-r... |
 |
auto oil seal | Seller: Xingtai Oubei rubber & Plastic products Co., LTD | auto oil seal At , we specialize in manufacturing and supplying auto oil seals that are en... |
