ZZZYP series pilot operated self-operated pressure regulating valve is an actuator product that does not need any external energy and uses automatic adjustment of the self-energy of the regulated medium. This product adopts the single seat valve quick opening flow characteristic adjustment mechanism, the internal use of non-filling, non-friction type movable components, the media pressure is stable, the adjustment accuracy is high, the sealing performance is safe and reliable, the set value can be arbitrarily adjusted during operation, etc. . Therefore, it is applicable to occasions such as the fuel gas of various industrial furnace combustion systems, the protection of the oil in the product storage tank or the oil storage tank (nitrogen seal) and the micropressure automatic adjustment of the heat treatment and shielding gas.