The ZAZM series electric sleeve regulating valves accept DC current signals from regulating instruments, altering the flow rate of the regulated medium to maintain the controlled process parameters at the set value. They are widely used in the production automation control of various industrial sectors such as power, metallurgy, chemicals, petroleum, light industry, textile, and papermaking. The nominal pipe sizes of this series range from 20 to 200mm, with nominal pressures of 1.0, 1.6, 4.0, and 6.4MPa. The operating temperature range is from -40℃ to 450℃, and the signal acceptance range is 0~10mA.DC or 4~20mA.DC. The electric single-seat regulating valve is suitable for low pressure differences, high medium viscosity, or slightly granular impurities. The electric sleeve regulating valve is suitable for high pressure difference applications. They are available in two types of sealing materials: metal-to-metal and non-metal-to-metal, with the latter achieving a leakage rate up to VI grade (zero leakage) when the valve is closed. They can be divided into two types of packing: general packing and bellows packing, with the former used for general applications and the latter for critical applications where external leakage is not permitted. Flow characteristics are linear or equal percentage. Different types of actuators can be used to create standard and electronic models. A variety of types and sizes are available for selection.