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　　The plate and frame type oil filter is mainly used to filter water and impurities in lubricating oil, hydraulic oil, transformer oil, turbine oil, cutting oil, light diesel oil and other oil. Stainless steel can be used as plant oil filter for the fuselage. The machine is composed of filter bed, oil pump and coarse filter. Taking industrial short staple cotton filter paper as the filtering medium, different filter paper specifications can be selected according to different filtering requirements, and the filtering accuracy can reach the accuracy of 1um in high energy. The utility model has the advantages of simple structure, convenient movement, easy operation and low operation cost. LY-100 plate and frame type oil filter can be equipped with oil gun. Optional stainless steel material, filter vegetable oil. Common flowmeter and digital flowmeter are optional. Optional with closed mode. The body color can be blue, green, white, etc.

　　The filtering material of LY-100 plate and frame type oil filter is mainly filter element and filter paper. The precision of filter element determines the filtering effect of oil products, and the thickness of filter paper determines the precision of filtering impurities. When selecting filter material, we often ignore the material of filter plate. In fact, the material and weight of filter plate are the key to ensure that the filter will not shake or leak oil. The filter material of plate and frame oil filter produced by Chongqing Zhongjing Filter Equipment Manufacturing Co., Ltd. is made of aluminum plate and cast iron. Today, I will introduce the advantages and disadvantages of cast iron material of LY-100 plate and frame oil filter.

　　Iron carbon alloy with carbon content more than 2%. Generally, the carbon content of industrial cast iron is 2.5% - 3.5%. Carbon in cast iron is mostly in graphite form, sometimes in cementite form. In addition to carbon, cast iron also contains 1% - 3% silicon, manganese, phosphorus, sulfur and other elements. Alloy cast iron also contains nickel, chromium, molybdenum, aluminum, copper, boron, vanadium and other elements. Carbon and silicon are the main elements that affect the microstructure and properties of cast iron. Cast iron can be divided into:

　　① gray cast iron. The carbon content is high (2.7% ~ 4.0%). The carbon mainly exists in the form of flake graphite, and the fracture is gray, which is called gray iron for short. It has low melting point (1145-1250 ℃), small shrinkage during solidification, close to carbon steel in compressive strength and hardness, and good shock absorption. Due to the existence of flake graphite, it has good wear resistance. The casting performance and cutting process are good. Used to manufacture machine bed, cylinder, box and other structural parts. Its brand number is followed by "HT" with two groups of numbers. For example: HT20-40 (the first number represents the minimum tensile strength and the second group represents the minimum bending strength).

　　② white cast iron. The content of carbon and silicon is low, the carbon is mainly in the form of cementite, and the fracture is silvery white. It is easy to produce shrinkage cavity and crack. High hardness and brittleness, unable to bear impact load. It is mainly used as the blank of malleable cast iron and wear-resistant parts.

　　③ malleable cast iron. After annealing of white cast iron, graphite is distributed in floccules, which is called ductile iron for short. Its structure and properties are uniform, wear-resistant, with good plasticity and toughness. It is used to manufacture parts with complex shape and strong dynamic load.

　　④ ductile iron. After spheroidizing the gray cast iron, the graphite is spheroidal, which is called nodular iron for short. All or most of the carbon exists as free spheroidal graphite with silver gray fracture surface. Compared with ordinary gray cast iron, it has higher strength, better toughness and plasticity. Its brand number is indicated by two groups of numbers attached to "QT", for example: qt45-5 (the first group of numbers represents the minimum tensile strength and the second group of numbers represents the minimum elongation). It is used to manufacture internal combustion engine, auto parts, agricultural machinery, etc.

　　⑤ vermicular cast iron. The graphite of gray cast iron is vermicular after it is vermiculated. The mechanical properties are similar to that of nodular cast iron, and the casting properties are between gray cast iron and nodular cast iron. Parts used to make cars.

　　⑥ alloy iron castings. Ordinary cast iron is obtained by adding some alloy elements (such as silicon, manganese, phosphorus, nickel, chromium, molybdenum, copper, aluminum, boron, vanadium, tin, etc.). Alloy elements make the matrix structure of cast iron change, so it has the corresponding characteristics of heat resistance, wear resistance, corrosion resistance, low temperature resistance or non magnetism. It is used to manufacture spare parts of mining, chemical machinery, instruments and meters, etc.