The back pressure valve is installed on the positive pressure discharge pipeline of the metering pump to prevent siphonage and eliminate fluctuations in the dosing amount caused by pressure fluctuations at the dosing point. On-site, remove the protective cap on the adjusting screw and rotate the adjusting screw. The pressure can be adjusted to the required value via the pressure gauge in the pipeline, and the back pressure can be set within the range of 0-0.6MPa by adjusting the screw.Used in co