Diaphragm pump

　　A diaphragm pump (English: Diaphragm pump) reciprocating pump that uses an elastic film, a corrosion-resistant rubber or an elastic metal sheet to separate the pump into two parts that are not in communication, respectively, where the liquid and the living column are present. In this way, the live column is not in contact with the delivered liquid. The reciprocating motion of the living column is transmitted to the diaphragm through the medium on the same side, so that the diaphragm also reciprocates, thereby realizing the suction and discharge of the liquid to be transported through the spherical valve. The only component in the diaphragm pump that is in contact with the liquid being conveyed is the spherical shutter, which is easily made into a form that is free from liquids. In industrial production, diaphragm pumps are primarily used to transport corrosive liquids or liquids containing solid suspended solids.

　　The diaphragm is a direct acting force to push the medium, so it is critical that we use the diaphragm correctly and the diaphragm is properly selected. We can choose the diaphragm according to the acidity and alkali content and particle content of the pumped medium. For details, please refer to the data:

　　Dingqing rubber diaphragm: resistant to gasoline, oil and moderately corrosive liquids

　　Neoprene diaphragm: resistant to various moderately acidic and alkaline liquids

　　Polytetrafluoroethylene and F46: resistant to strong acids and bases and various organic solvents

　　Fluororubber: organic solvent such as acid and alkali and toluene

　　The demand for diaphragm pumps in the domestic market has increased. Many units are not familiar with the materials used for diaphragms in one of the core components of diaphragm pumps when purchasing diaphragm pumps. Especially between polytetrafluoroethylene (F4) and F46. In the sales process, many customers have regarded F4 (polytetrafluoroethylene) as the best diaphragm. In fact, F46 (polyfluoroethylene propylene) is the most ideal diaphragm. Shanghai Xiangyang made the following distinctions:

　　The diaphragm is divided in color:

　　F4 is white opaque, F46 is grayish white, translucent

　　1. PVDF is polyvinylidene fluoride, which is a little worse than F4 and F46. It has low temperature resistance and poor corrosion resistance (price is much cheaper than F4 and F46.

　　2. PTFE (F4) is PTFE, which is quite resistant to temperature and corrosion. It is resistant to any medium corrosion and its color is absolutely white. It is generally used for lining fluorine pipes, valves, seals, bars, etc.

　　3. FEP (F46) is polyfluoroethylene propylene, the color is transparent, the corrosion resistance is equivalent to PTFE, and it is generally used for lining fluorine pump or perfluorinated pump. As a diaphragm, the F46 is softer and more wear-resistant than the F4, and its service life is relatively extended.

　　The diaphragm is distinguished by its nature:

　　1. Both F4 and F46 have strong corrosion resistance and chemical stability. The physical properties of F4 material are harder than those of F46. The temperature resistance is higher than that of F46, which is about 260 degrees. However, F4 is difficult to form, so many shapes are complicated. The accessories are made of F46.

　　2, F4 is PTFE, Chinese name: PTFE continuous use below 260 ° C

　　3, F46 is FEP, Chinese name: polyperfluoroethylene propylene continuous use below 200 ° C

　　Shanghai Yuyang absorbs the traditional advantages of diaphragm pumps, and is brave in innovation and continuous research and development. Now it has launched the fourth generation of electric diaphragm pump, QBY4 pneumatic diaphragm pump and new QBK pneumatic diaphragm pump. The main materials are divided into stainless steel (304, 316, 316L) diaphragm pump, aluminum diaphragm pump, cast iron diaphragm pump, fluoroplastic diaphragm pump, engineering plastic diaphragm pump, steel-lined fluorine diaphragm pump. Each material diaphragm pump can be equipped with different material diaphragms according to customer requirements. Which kind of diaphragm is required, you can call Xiangyang customer service for your reference. If the customer needs to replace the diaphragm with the diaphragm pump of other manufacturers, it can be determined according to the size of the diaphragm of the factory.

　　Polytetrafluoroethene, English abbreviation for PTFE, (commonly known as "Plastic King"), trade name Teflon®, in China, due to pronunciation, the trademark "Teflon" is also known as Teflon, Teflon , Tiefulong, Teflon, Teflon, etc., are transliteration of Teflon. Products of this material are generally referred to collectively as "non-stick coatings"; they are synthetic polymeric materials that use fluorine to replace all of the hydrogen atoms in the polyethylene. This material is resistant to acids and bases and to various organic solvents and is almost insoluble in all solvents. At the same time, PTFE has the characteristics of high temperature resistance, its friction coefficient is extremely low, so it can be used as a lubricant, and it has become an ideal coating for the inner layer of non-stick pan and water pipe.

　　Product name: diaphragm, high temperature diaphragm valve diaphragm, silicone diaphragm.

　　Specifications: DN15~DN80

　　Specifications: N15~DN80 quick-install diaphragm valve is used together, and can be customized according to customer requirements

　　Material: silicone rubber, EPDM, fluoro rubber, nitrile rubber.

　　Advantages: Industrial silicone rubber is resistant to water temperature or high temperature of steam of about 250 ° C, high elasticity, high tensile strength and high compressive strength.

　　Nitrile rubber is prepared by emulsion polymerization of butadiene and acrylonitrile. The 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 insulation performance and slightly lower elasticity. Nitrile rubber is mainly used in the manufacture of oil resistant rubber products.