Self regulating valves do not require external energy sources. They use the energy of the regulated medium as a power source, introduce an actuator to control the position of the valve core, change the pressure difference and flow rate at both ends, and stabilize the pressure before (or after) the valve. It has the advantages of sensitive action, good sealing, and small pressure set point fluctuations, and is widely used in automatic control of pressure reduction and stabilization or release and stabilization of gas, liquid, and steam media. This series of products has three types of structures: single seat (ZZYP), sleeve (ZZYM), and double seat (ZZYN). The actuator has two types: diaphragm type and piston type. The action types include pressure relief valve rear pressure regulation (B type) and pressure relief valve front pressure regulation (K type). The nominal pressure rating of the product includes PN16, 40, and 64; Valve body diameter range DN20~300; There are three levels of leakage levels: Level II, Level IV, and Level VI; The traffic characteristic is fast opening; The pressure is adjusted in stages from 15 to 250MPa. Can be combined as needed to meet user operating requirements.

Self operated regulating valve is composed of valve body, valve seat, valve core, balance spring and other components. It is a type of valve that does not require external energy and uses the pressure changes of the regulated medium to automatically adjust. It is an energy-saving product that introduces the controlled medium into the actuator based on mechanical principles to generate force and push it, controlling the up and down movement of the valve core element to achieve automatic adjustment, and maintaining constant pressure or pressure before or after the valve. The biggest feature of this product is that it can work in places without electricity or gas, and the pressure setting value can be adjusted freely during operation. Adopting fast opening flow characteristics, with sensitive action and good sealing performance, it is widely used in automatic control of gas, liquid, steam and other medium pressures in various industrial equipment such as petroleum, chemical, power station, light industry, printing and dyeing.

There are two types of actuators for this series of products: membrane type and piston type; The forms of action include: pre valve pressure regulation (pressure relief and holding type), post valve pressure regulation (pressure reduction and stabilization type); The attached thermal insulation condenser can be used at temperatures ≤ 350 ℃. According to different working conditions, different types of valve core structures and actuators can be selected to achieve the best control effect.