The ZZYP self-operated pressure regulating valve primarily consists of a control valve, an actuator, and a spring set to a predetermined pressure. It is suitable for non-corrosive liquids, gases, and steam, and is used for pressure control either upstream (where the control valve opens when upstream pressure rises) or downstream (where the control valve opens when downstream pressure rises) of the valve in system pipelines. It finds extensive application in petroleum, chemical, power, metallurgical, pharmaceutical, food, textile, machinery, and HVAC industries. Functional types include pressure-reducing downstream pressure regulation (Type B) and pressure-relieving upstream pressure regulation (Type K).