the notes of prevent damage of cock valve

In the installation of plug valves, in order to prevent damage to the plug, and to ensure full performance plug valves, should pay attention to the following four points: 1 to ensure that the valve is in the open state. The first pipeline heating. As much as possible to the heat transfer from the pipe plug valve. Avoid prolonged heating of valve itself. 2 the use of gauze or wire brush to remove pipe and cut, to bright metal. Steel wool is not recommended. 3 the first vertical cut along the pipeline, and finishing, deburring, diameter measurement. 4 outside of the pipe and welding hood apply flux, soldering flux must be completely covered surface. Use flux sparingly.