The strength performance of the brass valve refers to the ability of the brass valve to withstand the pressure of the medium. brass valves are mechanical products that are subject to internal pressure, so they must have sufficient strength and rigidity to ensure long-term use without rupture or deformation. The sealing performance of the brass valve refers to the ability of each sealing part of the brass valve to prevent the leakage of the medium, which is the most important technical performance index of the brass valve. There are three sealing parts of the brass valve: the contact between the opening and closing parts and the two sealing surfaces of the valve seat; the matching place between the packing and the valve stem and the stuffing box; the connection between the valve body and the bonnet. The leakage in the former part is called internal leakage, which is commonly referred to as lax closure, which will affect the ability of the brass valve to cut off the medium. For shut-off valves, internal leakage is not allowed. The latter two leaks are called external leakage, that is, the medium leaks from the inside of the valve to the outside of the valve. External leakage will cause material loss, pollute the environment, and even cause accidents in severe cases. For flammable, explosive, toxic or radioactive media, leakage is not allowed, so brass valves must have reliable sealing performance.
