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
 |
Carbon Seal | Mechanical carbon sealhas a long history. Graphite is an isoform of element carbon. In 1971, the United States studied the successful flexible grap... |
 |
PTFE Teflon Bellow Mechanical Seals | Polytetrafluoroethylene (PTFE) is one of the best corrosion resistant materials in the world. Therefore, it is called "the king of plastic". So the... |
 |
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... |
 |
Stainless Steel Seal | Stainless Steel is short for stainless acid resistant steel. It is called Stainless Steel with weak corrosive medium or Stainless Steel, such as ai... |
 |
TC Seal | TC materials have features of high hardness, strength, abrasion resistance and corrosion resistance. It is known as “Industrial Tooth”.... |
Same products
 |
oil seal kit | Seller: Xingtai Nok-Cn Metal Seal Manufacturing Co., Ltd. | oil seal kit is a collection of various Oil Seals and related components designed for specif... |
 |
High-Performance Valve Cover Gasket | Seller: Xingtai Nok-Cn Metal Seal Manufacturing Co., Ltd. | High-Performance Valve Cover Gasket Product Description: High-Performance Valve Cover Gasket... |
 |
freeze plug | Seller: Xingtai Nok-Cn Metal Seal Manufacturing Co., Ltd. | freeze plug We not only will try our best to offer excellent services to every customer, but... |
 |
Discover the Excellence of Bonded Seals | Seller: Xingtai Nok-Cn Metal Seal Manufacturing Co., Ltd. | Discover the Excellence of Bonded Seals Discover the Excellence of Bonded Seals Enhance you... |
 |
Fuel Injector Washer Manufacturer | Seller: Xingtai Nok-Cn Metal Seal Manufacturing Co., Ltd. | Fuel Injector Washer Manufacturer Fuel Injector Washer Manufacturer-NNK As a professional m... |
