A, FKM carbon steel imports combined washer overview
The FKM carbon steel inlet combination washer is formed by the rubber ring and metal ring as a whole. It is a seal ring used to seal the thread and flange. The ring includes a metal ring and a rubber seal.
Metal ring rust treatment, rubber ring generally uses oil resistant rubber or fluorine rubber. The combination cushion has two sizes, metric and imperial. There is a standard JB982-77 combination of metal pads and rubber. The combination washer is used for threaded pipe joint and screw plug seal. It is generally used together with the jacket type pipe joint to plug the oil port. It is mainly used for the static seal of the end face of the threaded connection of the hydraulic valve pipe joint. It is suitable for the static seal of the end face of the British, American Standard British thread and the French and German standard metric thread connection. The combined gaskets can be divided into A and B according to their structural forms. They can be divided into full and half packages according to the different kinds of packages.
The combination pad is widely used in the pipeline system with oil medium, for welding, clamping, expanding pipe joint, screw plug and mechanical device pressure system end face static seal.
Application of two, FKM carbon steel inlet combination washer
It is suitable for the pipeline system of oil medium. It is sealed for the pressure system of welding, clamping, expanding pipe joint, screw plug and mechanical device to prevent leakage of oil, fuel, water and medicine. Because of its simple structure, high efficiency and low cost, it has been widely applied in the machinery manufacturing industry.
technical parameter
Working pressure: less than 40 Mpa
Temperature: -20 degrees C ~ +220
Medium: hydraulic oil
Material properties
Material: rubber, metal material
Three, FKM carbon steel imported combination washer commonly used materials and properties.
1, rubber O ring (NBR): Ding Erxi C and fine copolymer, general use temperature range of -40~120 DEG C. The rubber is one of the common rubber in the oil seal and O type ring. The rubber O ring is a O ring with a wide use, low cost and low cost. The conventional hardness is 70 degrees.
Advantages: gasoline and aliphatic hydrocarbon oils are exceptionally good, second only to polysulfide rubber, propyl ester and fluorine rubber, and superior to other general rubber. Good heat resistance, tightness, abrasion resistance and water resistance. The disadvantages are poor cold resistance and ozone resistance, low strength and elasticity, poor acid resistance, poor electrical insulation and poor polarity solvent performance. Rubber O ring is used to make fuel tank and lubricating oil tank. It is a rubber part used in fluid medium such as hydraulic oil, gasoline, water, silicon grease, silicone oil, two ester lubricating oil, glycerol system hydraulic oil and so on. It is also used for producing various oil resistant products, mainly used in mineral hydraulic oil and In water pressure and air movement.
3, fluororubber O ring (FPM/FKM): Six boiling polypropane - vinylidene fluoride copolymer. The current widely used six boiling Department of fluorine rubber by DuPont Co to early "Viton" goods listed. High temperature resistance is superior to silicone rubber. It has excellent chemical resistance, most oil and most solvents (except for ketone, ester, ester), weatherability and ozone resistance, and the cold resistance is poor. The general use temperature range of fluororubber O ring is -40~240, the general hardness is 75 degrees, the color is Brown, and the green and black are also compared. The more common.  
Advantages: high temperature resistance, acid and alkali resistance, oil resistance, radiation resistance, high vacuum resistance, electrical insulation, mechanical properties, chemical corrosion resistance, ozone resistance, air aging resistance are excellent. Disadvantages are poor workability, high price, poor cold resistance, low elasticity and low permeability. Fluoro gum O rings are mainly used in the defense industry for the manufacture of vacuum, high temperature resistant, chemical resistant sealing materials, rubber pipes, or other parts and automobile industries on aircraft and rockets.