Check valve technical parameters

Clamp check valve, also known as counter-flow valve, check valve, back pressure valve, check valve. This kind of valve is automatically opened and closed by the force generated by the flow of the medium itself in the pipeline, which belongs to an automatic valve. Check valve for piping systems, i

Phosphorus is unusually strong in abundance

According to the previous yellow phosphorus market conditions, each year after entering the end of April, due to the main yellow phosphorus production areas in Yunnan, Guizhou and other places will soon enter the wet season, the output is expected to increase, the market price tends to gradually d