.

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



在线联系供应商

至: Hangzhou Sealcon Fluid Machinery Co., Ltd
Your E-mail:
消息正文:


Send to other suppliers

Other supplier products

Seal Spare Parts Sleeve
Seal Spare Parts Sleeve In most pumps, the portion of the shaft that is under the sealing arrangement is covered with a shaft sleeve. The shaft sleeve is a sleeve of metal...
Metal Bellow Mechanical Seals
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...
Rubber Seal
Rubber Seal Rubber seal is one of the common base components in sealing device, and plays an important role in the leaking and sealing. It is composed of one o...
O RING MECHANICAL SEALS
O RING MECHANICAL SEALS Types of O Ring Mechanical Seal We supply all standard types of materials in a range of Shore Hardnesses and colours. In addition to standard imper...
Single Cartridge Seals
Single Cartridge Seals Cartridge mechanical seal is assembled by the rotary ring, stationary ring, spring, secondary seal( o rings, PTFE), gland and other mechanical seal...
供应产品

Same products

STATIONARY SEATS
STATIONARY SEATS 卖方: Hangzhou Sealcon Fluid Machinery Co., Ltd Rotary and stationary ringare the main components of a mechanical seal, which is a device that he...
SINGLE CARTRIDGE SEALS
SINGLE CARTRIDGE SEALS 卖方: Hangzhou Sealcon Fluid Machinery Co., Ltd Our single cartridge mechanical sealis manufactured by balanced seal-face technology, helping to ...
Seal Spare Parts Spring
Seal Spare Parts Spring 卖方: Hangzhou Sealcon Fluid Machinery Co., Ltd Introduction ofSeal Springs For a mechanical seal, the initial closing force ensures that the sea...
Seal Spare Parts Sleeve
Seal Spare Parts Sleeve 卖方: Hangzhou Sealcon Fluid Machinery Co., Ltd In most pumps, the portion of the shaft that is under the sealing arrangement is covered with a s...
Seal Spare Parts Sealing Rings
Seal Spare Parts Sealing Rings 卖方: Hangzhou Sealcon Fluid Machinery Co., Ltd Brief Introduction of Sealing Rings The seal ring is a ring seal with the notch, it is placed in ...