The S-type, FS type, SL type, SY type, WSY type, and FSY series fiberglass pumps are made of polyvinyl butyral and modified phenolic glass fiber materials that are molded at high temperatures for liquid contact. They have good corrosion resistance, high temperature resistance, light weight, high specific strength, and no deformation. The shaft seal adopts two types: ordinary type and particle resistant machine seal (the submersible pump does not require mechanical seal structure, which is reasonable and consumes less power)