Seal leak problem is always the pursuit of chemical equipment, it is this requirement led to shield pump magnetic pump and expanding applications. However, the reliability of truly no leakage is still a long way to go, such as magnetic pump shield pump shield isolation kits and sets of life issues, pitting the material, static sealing and so on. Now on some basic aspects of seal briefly as follows: ⒈ seal form is for static sealing, usually only two forms of gaskets and seals, and O-ring seals again the most widely used; for dynamic sealing, chemical pumps rarely used packing seals, mechanical seals mainly mechanical seals have a single face and double face, balanced and unbalanced type of points, balanced for high pressure sealing medium (usually refers to a pressure greater than 1.0MPa), ih Chemical Heat pump water temperature, double end mechanical seal is mainly used in high temperature, easy to crystallize, the viscosity, containing particles and toxic volatile media, double-end mechanical seal should seal barrier fluid is injected into the cavity, the pressure is generally higher than the medium pressure 0.07 ~ 0.1MPa. ⒉ sealing materials chemical pump static sealing materials commonly used fluorine rubber, special circumstances the use of PTFE material; material configured static ring of the mechanical seal is more critical, not just the best carbide cemented carbide, high prices are a respect, no hardness difference between the two is also unreasonable, so the best treatment based on the characteristics of the difference between the media. F-Naifushibeng in petrochemical plants, used to transport all kinds of acid, alkali and other chemical corrosion medium pump, ih chemical pumps Kora, requires the use of corrosion resistant pumps. Figure 19-3 as an F-Naifushibeng. F-Naifushibeng a type of centrifugal pump, it works and maintenance methods and ordinary centrifugal pumps roughly the same. Their differences as follows: ① impeller, pump and bushings, and other contact with the liquid part of corrosion-resistant material; ② other parts have to take anti-corrosion measures, ih chemical pumps, as shown in FIG. 19-3, in the packing gland the bottom bracket plate using acid, Jingjiang ih chemical pumps, to prevent leakage of corrosive to the bracket so that the bracket corrosion; ③ mouth ring (sealing ring) is greater than the general centrifugal pump; ④ mechanical seal used with large spring and coated tetrafluoroethylene or other plastics, in order to avoid corrosion caused by leakage of the spring; ⑤ should avoid this type of pump operation at low flow, so that the liquid temperature leaving the corrosion intensifies, parking should be off the suction valve to prevent leaking pump media outside . ih chemical pump accessories | Chengyu pump (certified) | ih chemical pumps from Hebei Cheng Yu-Pump Manufacturing Limited. Hebei Cheng Yu-Pump Manufacturing Co. (www.chengyubengye.com) (www.chengyubengye.com) Hebei Baoding, centrifugal pumps leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum to meet customer needs. In Chengyu pump leadership with the staff warmly welcome all inquiries negotiations to create Chengyu pump better future.