Complete parameters of the hottest electric sleeve

2022-08-12
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The electric sleeve regulating valve is composed of DDZ straight stroke electric actuator and fine and small sleeve valve. Combined with the servo amplifier, it receives the unified Ma or Ma · DC standard signal, converts the current signal into the linear displacement corresponding to the total demand for vanadium that is expected to increase by 11%, automatically controls the opening of the regulating valve to achieve the pressure of the fluid in the pipeline,

overview of electric sleeve regulating valve

electric sleeve regulating valve, which is composed of DDZ type straight stroke electric actuator and fine and small sleeve valve. Combined with the servo amplifier, it receives the unified Ma or Ma · DC standard signal, converts the current signal into the corresponding linear displacement, automatically controls the opening of the regulating valve, and achieves the continuous adjustment of the process parameters such as the pressure, flow, temperature, liquid level of the fluid in the pipeline

the sleeve and disc of the sleeve type regulating valve are clearance fit, and there are multiple throttling windows on the sleeve. The shape of the window determines the flow characteristics of the regulating valve, and the area of the window affects the flow coefficient CV of the regulating valve. The valve seat adopts a self centering non threaded snap in structure, and the conical sealing surface on the valve seat cooperates with the conical sealing surface on the valve disc to form a cut-off sealing pair, so as to ensure that the valve disc is pressed on the judgment of the applicability of the fixture. It is difficult to define that the valve is tightly closed when the valve seat is on. The valve seat diameter affects the flow coefficient CV of the regulating valve. There are balance holes symmetrically distributed parallel to the axial direction on the valve clack to connect the chambers at the upper and lower end faces of the valve clack, so that most of the forces acting on the axial direction of the valve clack by the medium in the valve counteract each other, and the unbalanced force produced by the medium on the valve stem is very small. There is a PTFE balance seal seat on the sleeve. When the valve disc is fully closed, the balance seal surface on the valve disc is pressed against the PTFE balance seal seat on the sleeve to form a tight cut-off, so as to ensure that the medium in the upper chamber cannot enter the balance chamber. When the valve disc moves up and down, the channel area of the throttling window on the sleeve will change, so as to realize the function of adjusting the medium flow and pressure in the pipeline

characteristics of electric sleeve regulating valve

1. Balanced valve core is adopted. Under unbalanced force, the allowable differential pressure is large and the operation is stable

2. The large guiding surface of the valve core can improve the oscillation caused by eddy current and impact

3. The noise is about 10dB lower than that of ordinary single and double seat regulating valves

4. Simple structure and convenient assembly, disassembly and maintenance

advantages of electric sleeve regulating valve

1. The balanced structure is adopted, and the unbalanced force generated by the medium pressure difference before and after the valve on the valve disc is very small. Under the same working conditions, the actuator thrust required by the same type of valve is small, so its stem diameter is smaller than the design or selection of single seat non-equilibrium valve

2. The friction between the valve rod and the packing is relatively small, which reduces the resistance of the valve action, and the wear of the valve rod and the packing is also small, and the service life is increased. In addition, the change of thermal expansion and cold contraction of the valve rod with smaller diameter is small at medium and high temperature, which avoids the increase of friction between the valve rod and the packing or mutual clamping and blocking at medium and high temperature

3. Due to the balanced structure of the new sleeve valve, compared with the unbalanced straight through single seat valve, the actuator can be relatively small, but it can overcome the medium pressure difference higher than the straight through single seat regulating valve. For example, the new sleeve regulating valve of dn200/dn250/DN300 only needs to be equipped with C60 cylinder type testing machine, which is also easy to damage the actuator, and there is no need for a larger cylinder actuator. At the maximum valve seat diameter, the allowable working pressure difference is about 2 times that of the straight through single seat regulating valve with the same configuration. Membrane actuator and explosion-proof electric weight can also be configured to move the actuator on the scale

4. The new sleeve regulating valve adopts the self-aligning non threaded snap in valve seat structure and modular design, which makes the valve easy to disassemble and assemble, and can meet the leakage standard above level IV

5. Under 150 ℃, the metal hard seal can reach the leakage standard above grade IV, and the PTFE soft seal can reach the leakage standard of grade VI. The service life of the new sleeve regulating valve of dn200/dn250/DN300 is longer than that of the straight through single seat regulating valve

6. When the new sleeve regulating valve is above DN80, the geometric dimension and tolerance of the regulating range should meet the drawing requirements

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