ZAZN oxygen special electric two-seat regulating valve 904 receives DC current signal from the regulating instrument, changes the flow rate of the regulated medium, and keeps the controlled process parameters at a given value. It is widely used in production automation control of electric power, metallurgy, chemical industry, petroleum, textile, pharmaceutical, paper and other industrial sectors.

   This series of products have nominal diameter from 20 to 200 mm, nominal pressure of 1.0, 1.6, 4.0, 6.4 MPa, temperature range from - 250 C to 450 C, receiving signal of 0-10 mA.DC or 4-20 mA.DC. Electric two-seat regulating valve is suitable for large pressure difference occasions. There are two kinds of metal-metal and non-metal-metal seals according to the sealing material of the inner parts of the valve. The leakage of the latter can reach the level VI (zero leakage) standard when the valve closes. According to the different fillers, it can be divided into two kinds: general filler 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 characteristics are linear or equal percentage. Different actuators can be divided into two types: common type and electronic type. Various varieties and specifications are available.

Product characteristics:

·The valve body is designed in accordance with the principle of hydrodynamics, and the rated flow coefficient increases by 30%.

· The adjustable range is large, the inherent adjustable ratio is 50, and the flow characteristics are straight line and equal percentage.

· Electric two-seat regulating valve has small unbalance force, good valve stability and large pressure difference.

· The valve core with soft sealing structure is adopted in the regulating and cutting type, which meets the leakage standard of Grade VI (zero leakage).

· The servo amplifier adopts deep dynamic negative feedback, which can improve the accuracy of automatic regulation.

· There are many kinds of electric operators, which can be used in 4-20 mA.DC or 0-10 mA.DC.

· The electronic electric regulating valve can directly control the opening of the valve by the current signal without servo amplifier.

· The bellows sealed control valve completely sealed the moving stem to prevent fluid leakage.

Technical parameters:

Relevant structural drawings are as follows: