Pvc Lay Flat Hose,Pvc Lay Flat Hose Pipe,Pvc High Pressure Lay Flat Hose,Pvc High Pressure Layflat Hose JIANGSU SUNMOON SHALE GAS HIGH PRESSURE HOSE CO.,LTD , https://www.tpulayflatpipe.comSelf-Regulating valve through the valve itself through the medium pressure, temperature as the energy-driven valve automatically work, no external power supply and secondary instrument. Also known as self-control valve. Self-regulating valves are the use of valve feedback signal output (pressure, pressure, temperature) through the signal pipe to the actuator drive valve to change the valve opening, to regulate the pressure, flow, temperature purposes.