Product Description:
ZAZP series electric single-seat control valves accept the DC current signal from the regulating instrument, change the flow rate of the medium to be modulated, and keep the controlled process parameters at a given value. It is widely used in production automation control in electric power, metallurgy, chemical, petroleum, textile, pharmaceutical, papermaking 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 -40°C~450°C, and the acceptance signal is 0~10mA.DC or 4~20mA.DC. Among them, the electric single-seat control valve is suitable for occasions with small pressure difference, large medium viscosity or slightly particulate impurities. Electric sleeve control valves are suitable for large pressure differences. According to the material of the sealing part of the valve trim, there are two types of metal-metal and non-metal-metal seals, the latter of which can reach the VI (zero leakage) standard when the valve is closed. According to different packing materials, it can be divided into two types: general packing seals and bellows seals, the former is used in general occasions, and the latter is used in important occasions where leakage is not allowed. The flow characteristics are linear or equal percentage. The actuators with different actuators can be divided into two types: ordinary type and electronic type. A wide variety of sizes are available.
Product features:
The valve body is designed according to the principle of hydrodynamics, and the rated flow coefficient is increased by 30%.
The adjustable range is large, the intrinsic adjustable ratio is 50, and the flow characteristics are straight and equal percentages.
The adjustable cut-off type adopts a soft seal structure spool, which meets the Class VI leakage standard (zero leakage).
The servo amplifier uses deep dynamic negative feedback for improved auto-adjustment accuracy.
Electric actuators come in a variety of forms and can be applied to 4~20mA. DC or 0~10mA.DC.
Electronic electric control valves can directly control the valve opening by the current signal, without the need for a servo amplifier.
Bellows sealed control valves form a complete seal on the moving valve stem and block fluid leakage.
Part material
Valve body, valve cover: HT200, ZG230-450, ZG1Cr18Ni9Ti
Valve spool: ZG1Cr18Ni9Ti, Stella alloy overlay weld reinforced PTFE
Fillers: Teflon, flexible graphite
Putter, bushing: 2Cr13
Gaskets: Rubber asbestos board, 10, 1Cr18Ni9Ti asbestos wound gasket
Bellows: 1Cr18Ni9Ti
Connection standard
Flange standard: cast iron flange according to GB4216-84, cast iron flange according to GB9113-88
Flange sealing surface type: PN10 and PN16 are convex surfaces
PN40 and PN64 are concave and convex surfaces, and the valve body is concave
Structure length: GB12221-89
Jacket insulation jacket heat-carrying body interface: butt weld φ18×4
The body flange and flange end face distance can be manufactured according to the standard specified by the user. Such as ANSI, JIS, DIN, and other standards.