First, the introduction of the Taiwan O circle.
The O-ring of imported spraying sealing ring is a kind of rubber ring with circular cross-section. Because the cross-section is O-ring, it is called O-ring. One of the most widely used hydraulic and pneumatic transmission systems. Often called O-Ring.O-rings in Taiwan and Japan are circular rubber sealing rings with circular cross-section.Under static conditions, O-rings of imported spraying sealing rings can prevent leakage of liquid and gas media.Under dynamic conditions, O-rings can also be used as dynamic sealing elements for axial reciprocating motion and low-speed rotating motion. According to different conditions, different materials can be selected to suit them.
Two, imported spray seal ring O ring rubber material brief introduction
1) NBR butadiene rubber (also known as Ding Qing rubber).
A. NBR butadiene rubber is copolymerized by acrylonitrile butadiene, and the limit temperature range is -40~120 C. Tin eye glue is one of the most commonly used rubber materials for oil seals and O rings.
B. Rubber parts made of NBR, especially sealing parts (such as O-rings, star rings, ED rings, polyurethane oil seals, rubber flat gaskets, etc.) are widely used in fuel tanks, lubricating oil tanks, petroleum hydraulic oils, gasoline, water, silicone grease, silicone oil, diester lubricants, glycol hydraulic oils and other fluids. In the medium. It can be said that butadiene rubber is the most widely used and low cost rubber seal.
C. NBR advantages of butadiene rubber
Oil resistant, water resistant, solvent resistant and high pressure resistant oil has excellent characteristics.
Good compression, wear resistance and elongation.
D. NBR disadvantages of butadiene rubber
It is not suitable for polar solvents, such as ketones, ozone, nitro hydrocarbon and land imitation.
Three. Imported O-ring seals, food grade silicone aprons.
Silica O-rings are often used as high-temperature food-grade sealing rings because of their high-temperature anti-aging ability; at the same time, they are resistant to low temperature, oxidation and ozone, and have high permeability and high resilience. Adding conductive carbon black, nickel powder, aluminum powder and silver powder into silica gel can make it have certain conductivity. It can be compatible with most oil substances, chemicals and solvents. Wear resistance and water resistance in general, generally do not need dynamic seals. Generally, it can not be used in concentrated solvents, oil products, concentrated acids and diluted caustic soda solution.
The limit temperature of silica gel is - 60 ~250 C, and the special silicone rubber can reach 300 C. The common colors are white, white, transparent, red and so on.
Silica gel and its O-ring are widely used in all walks of life, such as national defense industry, daily necessities and modern industry. Because of its innocuity and tasteless environmental protection, silica gel is often chosen as a seal for the food industry and household appliances. Because of the conductivity of silica gel, it is used for TV anode cover, electrical connector, liquid crystal display contact parts and so on. Silicone products are also often used for waterproof and leaking in toiletries, sealed at cement joints. Used in automotive industry for door, window and body seals, spark plug shield and bioreactor lining, electronic parts, valve cover and oil tank bottom shell static seals, etc.