Balem 133-020 ressure relief/Sustaining & Check Valve

Model 133-020 consists of Basic Valve(BALEM 130) and Pressure Relief Valve(Model 573). It is installed at bypass of the pipe line in order to prevent damage on pipe by discharging high pressured water to atmosphere once the pipe pressure increased higher than the pre-set pressure, and strengthen the maintenance of constant pressure at the inlet pressure within the pre-set pressure. Also, once downstream pressure is higher than inlet pressure close the basic valve in order to prevent the backflow caused by back pressure. To protect eqiupment in the pipeline, when pressure raises rapidly, valve will open fast and when valve closes, closes slow to protect surges and can adjust the speed of the opening and closing.