The main material of chemical pump mechanical seal material

(1) Rubber asbestos packing XS250 (extreme use temperature 250 ° C), rubber asbestos packing XS350 (limit use temperature 350 ° C):

Applicable medium: steam, water, alkaline solution. The main production units: Shanghai Asbestos Factory, Beijing Asbestos Factory, Qingdao Asbestos Factory, Kaifeng Asbestos Factory, Xi'an Asbestos Factory, Chongqing Asbestos Factory, Anshan Asbestos Factory, Shenyang Sealing Packing Test Factory.

(2) Oil-impregnated asbestos packing YS250 (limit use temperature ≤250°C), YS350 (limit use temperature ≤350°C): The outstanding feature of this product is that the packing contains lubricating oil, the friction coefficient is small, and the compression amount is large.

Applicable medium: steam, air, industrial water, heavy petroleum products.

The main production units: Shanghai Asbestos Factory, Beijing Asbestos Factory, Qingdao Asbestos Factory, Kaifeng Asbestos Factory, Xi'an Asbestos Factory, Chongqing Asbestos Factory, Anshan Asbestos Factory, Shenyang Asbestos Factory.

(3) Polytetrafluoroethylene asbestos packing SMF: Operating temperature: -100～+250°C, suitable medium: corrosive medium such as weak acid and strong alkali.

The main production units: Shanghai Asbestos Factory, Qingdao Asbestos Factory, Shenyang Sealing Packing Test Factory.

(4) Oil-impregnated cotton and hemp root YMM: Extreme use temperature: ≤120°C, suitable medium: river water, tap water, groundwater, seawater, etc.

The main production units: Shanghai Asbestos Factory, Beijing Asbestos Factory, Qingdao Asbestos Factory, Kaifeng Asbestos Factory, Xi'an Asbestos Factory, Chongqing Asbestos Factory, Anshan Asbestos Factory, Shenyang Sealing Packing Test Factory.

(5) Polytetrafluoroethylene fiber braided packing, the product is divided into six grades.

The main production units: Hefei General Machinery Research Institute, Shandong Zaozhuang Fluorine Plastics Factory, Shanghai Plastics Research Institute, Shenyang Sealing Packing Test Plant.

During use, begin to allow a small amount of leakage of the filler. After a period of use, the packing is in a relatively stable state, and then adjust the packing gland. Do not press too tightly at the beginning to prevent burning of the filler.

(6) Carbon fiber braided sealing filler: It is a new material with high strength and high modulus. It has the advantages of high strength, high modulus of elasticity, high temperature resistance, chemical corrosion resistance, good thermal conductivity and low thermal expansion coefficient. Self-lubricating.

In the initial operation, the packing gland should be lightly pressed to allow a small amount of leakage of the medium. After a period of operation, it is gradually pressed to make the packing enter a relatively stable stage. Carbon fiber PTFE braided packing (FTH-1), if leaks are found during operation, the packing gland can be tightened several times.

The main production units: Anshan City, Liaoning Province, asbestos factory, Shenyang seal filler test plant, Shanghai carbon plant, Liaoyuan City, special fiber test plant.

(7) Phenolic fiber braided sealing filler: It has the advantages of high temperature resistance, acid medium corrosion resistance, good adsorption and heat insulation performance, low friction coefficient, abrasion resistance, no pollution to human body and environment, and low price. Mainly used in high-pressure piston pump, high-pressure water pump, FRP acid-resistant pump, ammonia pump, reciprocating pump and oilfield deep well pump packing seal. The performance is shown in the following table:

Applicable medium

Acid and alkali, organic solvents, engine oil, steam, water, etc.

The main production units: Zhejiang Yuyao Tanghou Sealing Packing Factory, Shenyang Sealing Packing Test Plant, Shandong Zaozhuang Fluorine Plastic Factory, Shanghai Asbestos Factory.

(8) Expanded graphite (flexible graphite) material: in addition to the excellent self-lubricity, corrosion resistance, high and low temperature resistance, radiation resistance, wear resistance and low friction coefficient of graphite itself, it also has softness and low density. , compression resilience and a wide range of operating temperatures. The applicable media has a PH value of 0 to 14. Aside from a few strong oxidizing media such as aqua regia, concentrated nitric acid, concentrated sulfuric acid and dichromate at high temperatures, other media can be used. Before loading the stuffing box, the packing ring is cut with a blade and then only axially twisted. It is placed on the shaft and pressed into the stuffing box. The incision should be staggered 900 or 1200 per turn. A small amount of leakage is allowed at the beginning of the operation, and the amount of leakage will gradually decrease as time goes by.

The main production units: Shandong Binzhou Flexible Graphite Sealing Factory, Zhejiang Cixi Sealing Material Factory, Zhejiang Yuhuan Chumen Sealing Parts Factory, State-owned Wuxi Yuke Petrochemical Sealing Factory.

(9) Carbon-graphite material: It has good thermal conductivity, electrical conductivity, chemical stability, thermal shock resistance, self-lubricity and processability. In the pump industry, it is used for centrifugal pump, shield pump, diesel distribution pump, submersible pump, clean water pump, high temperature hot oil pump, nuclear secondary pump, boiler feed pump, air pump and other end seals, ring seal, mechanical seal ring, shaft For sealing, rotating film, etc.

The main production units: Dongxin Electric Carbon Plant, Harbin Electric Carbon Plant, Shanghai Electric Carbon Plant, Beijing Electric Carbon Plant, Fuxin Electric Carbon Plant, Zhuzhou Electric Carbon Plant, Zhenjiang Electric Carbon Plant.

Ten, rubber

(1) Natural rubber: It has excellent flex resistance, good wear resistance, cold resistance and insulation, and high tear strength. It is resistant to aging, poor weather resistance, oil resistance and solvent resistance. use