ZZYP self-operated pressure regulating valve is a kind of energy-saving pressure regulating valve, which does not need external energy, but only depends on the pressure change of the medium itself to achieve automatic regulation and the pressure before (or after) the valve is constant. The valve is an ideal energy-saving product. It is widely used in the pressure and stability of steam. It is also suitable for the automatic control of non-corrosive gases, low viscosity liquid medium pressure reduction and pressure stabilization (behind the valve) or pressure relief and pressure stabilization (before the valve).