Fluoroplastic pump is a kind of pump in the chemical pump series which is classified by the manufacturing material. Fluoroplastic pump can be divided into the following categories according to its structure: (1). Fluoroplastic centrifugal pump; (2). Fluoroplastic submersible pump; (3). Fluoroplastic magnetic pump; (4). Fluoroplastic self-priming pump; (5). Fluoroplastic pipeline pump; (6). Fluoroplastic mortar pump; (7). Steel-lined fluoroplastic pump, etc.
1. Fluorine-lined plastic pump
Fluorine-lined centrifugal pump is a new generation of corrosion-resistant centrifugal pump, which integrates the advantages of various chemical pumps and is suitable for long-term transportation of various acids, oxidants and other corrosive media of any concentration under temperature conditions of -20℃ ~ 120℃. The impeller and pump cover are made of metal inserts wrapped with fluoroplastics, and the pump body is made of metal shell and lined with fluoroplastics (F46), which is enough to bear the weight of the pipeline and withstand mechanical impact. The shaft seal adopts advanced external bellows mechanical seal, the static ring is made of 99.9% alumina ceramics, and the dynamic ring is made of polytetrafluoroethylene filling material. The characteristics of fluorine-lined plastic centrifugal pump are corrosion resistance, wear resistance and good sealing.
2. The all-fluorinated plastic pump
The all-fluorinated plastic pump is a centrifugal chemical pump that was developed earlier and is more commonly used. Its pump head is all molded with fluorinated plastics. The main materials are polymer materials, F26 materials, F46 materials, and fluorinated plastic alloy materials. The price error is relatively large due to different materials. Manufacturers are easily confused when choosing, because they choose the right material according to the type of medium being transported, corrosiveness, medium temperature, and medium concentration. This type of pump is generally used to transport chemical fluids in industries and mines where the inlet and outlet pipe diameters are relatively small and the flow and head requirements are low. Because the pump head is all made of fluorinated plastics, the mechanical strength is relatively weak and it is easy to crack and age. The inlet and outlet pipes of the pump must be disassembled during maintenance. Otherwise, it is easy to damage the pump body due to external force and pipe gravity during maintenance and installation.
3. Fluoroplastic alloy pump
Fluoroplastic alloy pump is made of polytetrafluoroethylene (F46) and polytetrafluoroethylene (F4) fused in a certain proportion – fluoroplastic alloy (F50), referred to as fluoroalloy. The material of products made of fluoroalloy is higher than F46, and the temperature resistance is also improved. This is why many fluoroplastic pump and valve manufacturers use fluoroalloy to make their moving parts – impellers. When choosing a pump, comprehensive considerations need to be made. The price of fluorine-lined centrifugal pump is relatively lower than that of perfluoroplastic pump. It can be selected when the inlet and outlet pipelines are required to be below 80 and the flow head is below 30. Fluorine-lined centrifugal pumps with relatively large requirements are more suitable, and perfluoroplastic pumps with metal shells can better withstand the gravity of the pipeline. It is also relatively simple to repair and replace accessories and relatively safe. Fluoroplastic alloy pumps perform well in special working conditions and have strong advantages in high temperature, wear resistance and other fields.
