Carbon Seal
Carbon mechanical seal has a long history. 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.
Selection of Carbon Seal Material
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.
Specification of Carbon Ring Seal
Sealconcan produce differentcarbon shaft seals according to different customers’ requirement.
As a carbon seal ring manufacturer, we will do our best to meet all the needs of customers.
More kinds of hydrocarbon pump mechanical seal, please visit our website.
Send product request
Other supplier products
 |
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... |
 |
PTFE TEFLON BELLOW MECHANICAL SEALS | PTFE Teflon Bellow Mechanical Sealfor Sale China PTFE Teflon Bellow sealhas been widely applied in the area of atomic energy, defense, aerospace, e... |
 |
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... |
 |
SiC Mechanical Seal | Sealconsilicon carbide products are classified into many kinds according to different application environment. It is generally used more mechanical... |
 |
Flygt Mechanical Seals FSU-90 | Hangzhou Sealcon Fluid Machinery CO., Ltdwas established in 2011, with Sealcon trademark we specialized in high quality mechanical sealdesign, manu... |
Same products
 |
E Foil Battery | Seller: Shenzhen Worldpower Energy Storage Technology Co.,Ltd | The E Foil Batteryis revolutionizing the world of electric foiling boards. This high-performance ... |
 |
4 Inch Flapper Disc | Seller: Keying Abrasives | Keying 4 in flap disc including Paint & Striper Disc with a central hole, Paint & Striper... |
 |
LFR30B Infrared Forehead Thermometer | Seller: Lepu Medical Technology(Beijing)Co.,Ltd | Blue dots focusing calibration system help users to find the optimal measuring distance LFR30B... |
 |
Hot Shrinkage Mould | Seller: Guangdong Yufeng Industries Co.,Ltd | The life of hot shrinkage mouldis closely related to the extruded material and extrusion ratio, a... |
 |
Copper Tape With Conductive Adhesive | Seller: HOPELIGHT ELECTRICAL CO.,LIMITED | Copper Tape With Conductive Adhesive Copper tape with conductive adhesive is made of high-qualit... |
