ZAZN type electric double-seat regulating valve accepts DC current signal from the regulating instrument, changes the flow of the regulated medium and keeps the controlled process parameters at the given value. It is widely used in the production automation control of electric power, metallurgy, chemical industry, petroleum, light textile, pharmaceutical, paper making and other industrial sectors.
The nominal diameter of this series of products is from 20 to 200mm, the nominal pressure is 1.0, 1.6, 4.0, 6.4MPa, the operating temperature range is from -250℃ to 450℃, and the receiving signal is 0～10mA.DC or 4～20mA.DC. Electric double-seat regulating valve is suitable for occasions with large pressure difference. According to the material of the sealing part of the valve trim, there are two types： metal-metal and non-metal-metal seals. The leakage of the latter can reach the standard of Class VI when the valve is closed. According to different packing, it can be divided into general packing seal and bellows seal. The former is used in general occasions, while the latter is used in special occasions where leakage is not allowed. The flow characteristic is linear or equal percentage. Equipped with different actuators, it can be divided into two types: ordinary type and electronic type. A variety of varieties and specifications are available.
Nominal Diameter DN(mm)
Rated Flow Coefficient Kv
Nominal Pressure (MPa)
Inherent Flow Characteristics
Straight line, equal percentage
Inherent Adjustable Ratio
Hard seal: Class II, IV Soft seal: Class VI
Working Temperature t(℃)
Signal Range (mA.DC)
Mode of Action
Electric off type electric on type
Operating Environment Temperature (°C)
Electric regulating valve: -20～70 Servo amplifier: 0～50
Use Environment Humidity
Electric regulating valve: ≤95% Servo amplifier: ≤85%
220V . AC 50HZ380V . AC 50HZ
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