The axial flow regulating valve is also called the axial flow valve. As the name suggests, the axial flow valve is named because the flow direction of the spool is coaxial with the pipe.
The axial flow regulating valve can be used for the working pressure and total flow of the large flow pipe. Its basic principle of operation is non-pedal type, using an eraser ring as a hydraulic control system, the secondary ring will make expansion or contraction reaction according to the pressure difference acting at both ends, thereby achieving control pressure or flow. the goal of.
Due to the non-mechanical control method, there is no mechanical connection between the axial flow valve and the control element, which makes the axial flow valve small in size, light in weight, unique in the clip-on design, easy to install and use, and the air flow is the shaft. The (straight) flow path flows, the voice is low, and the operation is quiet. This series of regulating valve (pneumatic regulating valve) is not only suitable for clear water, but also resistant to natural rivers and lakes, water and mild sewage. From the design of structural materials, the problem of easy scaling, jamming and driving device of the flow regulating valve has been solved for many years.
The valve passage of the valve body of the conventional straight stroke regulating valve is S-shaped, and the direction of movement of the spool is perpendicular to the axis of the pipe. Different from the conventional pipe S-type flow channel, the axial flow regulating valve is designed in the middle of the valve body to be a streamlined cone body coaxial with the pipe. When the fluid passes, the cone will be dispersed around the cone body to form a concentric cocurrent beam, which passes through the valve body. The annular flow passage is throttled into the downstream pipeline by the sleeve.
The spool is moved in the sleeve and in a coaxial direction to regulate the flow. The characteristics of the flow path of the axial flow regulating valve make the inner cavity of the valve evenly stressed, and control the vibration caused by the uneven force. In terms of medium flow, the flow channel is an S-type valve, and the flow direction of the medium can be selected. Usually, the single-seat valve is low-in and high-out, the double-seat valve is high-in and low-out, and the inlet and outlet directions are not interchangeable according to the valve trim. .
The flow direction of the axial flow regulating valve is single, and the inlet and outlet directions cannot be exchanged. The axial flow regulator uses a soft and hard seal. The leakage can reach V-VI level. The valve core is provided with a pressure balance hole, and the sleeve is provided with a plurality of throttle holes, which are similar to the conventional sleeve valve and the low noise valve valve inner structure.
Axial flow control valve features:
1. The valve is superior to the traditional flow regulating valve in that its structural design and material selection make it not afraid of sewage blocking the slide, not afraid of scaling, and it is not easy to jam. The drive unit is significantly reduced.
2. The valve can automatically adjust the preset pipe medium parameter value to keep it constant within a certain precision, and the accuracy range can also be adjusted.
3. The valve has good cavitation resistance. The ribs inside the valve body also function as a rectifying plate to disperse the water flow and prevent cavitation. At the same time, the noise of the valve and the vibration of the piston are also reduced.
4. The control system of the valve can adopt integrated electronic circuit, which is small in size, good in reliability, high in sensitivity, and convenient in installation and debugging.
5, the full clearance leakage is zero, can be used as a stop valve. There is no need to set up other cut-off valves.
6. If the degree of control and accuracy requirements are not very high, the control of the valve can be in manual or ordinary electric form.
7, can be installed in the bedroom, can also be installed vertically.
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