1. NBR（nitrile butadiene rubber）
The solenoid valve is made of butadiene and acrylonitrile by emulsion polymerization. Nitrile rubber is mainly produced by low temperature emulsion polymerization. It has excellent oil resistance, high wear resistance, good heat resistance and strong adhesion. The disadvantages are poor low temperature resistance, poor ozone resistance, poor electrical properties and slightly lower elasticity.
Main uses of solenoid valve: solenoid valve nitrile rubber is mainly used to make oil-resistant products, solenoid valves such as oil-resistant pipes, tapes, rubber diaphragms and large oil bladders, etc., are often used to make various oil-resistant molded products, such as O-rings, oil seals, leather Bowls, diaphragms, valves, bellows, etc., are also used to make rubber sheets and wear-resistant parts.
2. EPDM EPDM (Ethylene-Propylene-Diene Monomer)
The main characteristic of the solenoid valve EPDMZ is its excellent resistance to oxidation, ozone and erosion. Since EPDM belongs to the polyolefin family, it has excellent vulcanization characteristics. Solenoid Valve Among all rubbers, EPDM has the lowest specific gravity. The solenoid valve can absorb a large amount of packing and oil without affecting the characteristics. Therefore, a low-cost rubber compound can be produced.
Solenoid valve molecular structure and characteristics: EPDM is a terpolymer of ethylene, propylene and non-conjugated diene. Diolefins have a special structure, the solenoid valve can only copolymerize with one of the two bonds, and the unsaturated double bonds are mainly used as cross-links. The other unsaturated one will not become the polymer backbone, only the side chains. The main polymer chain of EPDM is fully saturated. This characteristic of the solenoid valve makes EPDM resistant to heat, light, oxygen, and especially ozone. EPDM is nonpolar in nature, resistant to polar solutions and chemicals, has low water absorption, and has good insulating properties. Solenoid valve characteristics: ① low density and high filling; ② aging resistance; ③ corrosion resistance; ④ water vapor resistance; ⑤ superheat resistance; ⑥ electrical properties; ⑦ elasticity;
3. VITON fluorine rubber (FKM)
The fluorine-containing rubber in the molecule of the solenoid valve has various types according to the fluorine content, that is, the monomer structure; the fluorine rubber of the hexafluoride series of the solenoid valve has better high temperature resistance and chemical resistance than the silicone rubber, and the solenoid valve is resistant to most oils and solvents (except ketones and esters), good weather resistance and ozone resistance, but poor cold resistance; solenoid valves are generally widely used in automobiles, B-class products, and seals in chemical plants, and the operating temperature range is -20 ℃ ～260℃, when low temperature is required, there is a low temperature resistant type that can be used up to -40℃, but the price is higher.
Post time: Oct-28-2022