The diaphragm adjustable pressure reducing regulator valve is a special valve installed on the pipeline of the water supply and drainage system of high-rise buildings to reduce the inlet pressure to a certain required outlet pressure. YX741X diaphragm adjustable pressure reducing valve relies on its own energy to keep the outlet pressure stable at the set value, that is, the outlet pressure does not change due to the change of inlet pressure and flow, and the inlet of the valve control system is equipped with a self-cleaning filter, using fluid characteristics, so that the suspended particles with larger specific gravity and larger diameter will not enter the control system. Ensure unimpeded system circulation and allow valves to operate safely and reliably. The system is sensitive and has a long service life.