What are the characteristics of non electric ball valves? As the name implies, the non electric ball valve refers to the main material of the pipe body forming the expansion joint, which is used as fiber fabric or other special non materials. The important accessories of the non electric ball valve are the important guarantee for the normal operation of the non electric ball valve. Therefore, these parts should be properly selected according to different service conditions and the characteristics of non electric ball valves.
1. Liner: used to reduce the inner wall of the non electric ball valve pipe and the cylinder of the fluid passing through it, so as to reduce the fluid resistance and protect the inner surface of the pipe. Also called inner sleeve or conduit. The lining material can be the same as or different from the pipe.
2. Stop bar: set on the expansion joint assembly. It is usually made of rods or rods. It is mainly used to limit the movement range (axial, transverse, angular direction) of the pipe under normal working conditions. When the support is damaged during the main fixation, this component can prevent the non electric ball valve pipe from over stretching and compression, and can also control all internal pressure loads and dynamic loads caused by the support damage.
3. Labyrinth structure is adopted for non electric ball valve to prevent reverse migration of flue gas. Aluminum silicate fiber felt and aluminum silicate limit cotton can not only reduce the working temperature of non electric ball valve, but also prevent flue gas from entering
4. The end plates on both sides of the non electric ball valve are welded on the two connected flues and ash ducts respectively, and the refractory insulation materials are filled between the lining wall and the high-temperature resistant fiber to prevent the leakage of flue gas and fly ash.
5. The expansion gap between the non electric ball valve and the flue and the ash duct is filled with a fire-resistant steel wire mesh seal ring wrapped with fire-resistant fiber to prevent fly ash from depositing in the expansion gap, thus impeding the normal process of thermal expansion; At the same time, the anti channeling of smoke is also prevented.