1. Corrosion resistance, high temperature resistance, low temperature: chemical pump delivery of the media, including chemical raw materials, reaction intermediates, such as the general is a corrosive medium. The materials of pump selection of an appropriate and reasonable, with corrosion resistance; and the chemical pump for transporting the media sometimes is medium high temperature, flow of liquid material, the reaction required and the resulting heat carrier liquid. For example: condensate pump, boiler feed pump, heat pump. Chemical pump delivery of low temperature medium, there are many kinds, such as liquid oxygen, liquid nitrogen, methane and other, the pump temperature work mostly in a 20 - 10 DEG C. No matter transport resistance to corrosion, high temperature or low temperature chemical pump, material selection and structure must be appropriate, must have sufficient strength, design and manufacture of pump parts to thermal shock, thermal expansion and low temperature deformation, the influence of cold brittleness. To ensure that the pump can be safe and stable operation.
2. To meet the needs of chemical process: Pump in chemical production, not only to transport liquid materials and requirements of the process to provide the necessary pressure, must also ensure the delivery amount of material, in certain chemical unit operation, pump flow and head to stabilize, maintain a high efficiency and reliable operation of the pump.
3. Resistance to abrasion and erosion: contains solid particles suspended in the chemical pump delivery of logistics, while the pump impeller chamber while others work under high pressure and high flow rate, pump parts surface protection layer is destroyed, its life is short, so must improve the chemical pump wear resistance, erosion resistance, which requires materials of pump selection of wear resistant steel, ceramics, cast iron, and so on, the choice of erosion resistant titanium, manganese.
4 . No leakage or less leakage: flammable, explosive, poisonous and harmful liquid chemical pump delivery of most of the media, once the leak will seriously pollute the environment, endanger the personal safety and worker's physical and mental health, but do not meet the factory and clean and civilized factory without leakage, which must ensure operation of chemical pump does not leak, in pump seal on the new technology, new material, according to the operating rules and high quality maintenance.
5. Reliable operation: the operation of the chemical pump is reliable, including two meanings: first, the long period of operation is not a failure; the two is running in a variety of parameters. The reliability of operation is very important to the chemical production. If the pump often fails, it will not only result in regular production, affect production and economic benefits, and sometimes may cause accidents in chemical systems. Chemical pump speed fluctuations will cause fluctuations in flow and pump outlet pressure, so the chemical production can not normal or system reaction affected, the material can not balance, not only wasteful, and even cause decline in the quality of the products or the rejection of the products. So the chemical pump has the characteristic that must run smoothly and reliably.
