Reduced Diameter Slab Gate Valve

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1. It has the advantages of simple and compact structure, reasonable design, reliable sealing, light and flexible operation, small size, smooth channel, low resistance, easy installation and easy disassembly.

2. When the valve is fully opened, the flow resistance coefficient is very small, and the valve will eliminate the function of the valve disc and the dirt on the sealing surface every time the valve is opened and closed.

3. The packing is made of flexible graphite ring and graphite packing, reliable sealing, light and flexible operation.

4. It is widely used in oil and water steam pipelines such as petrochemical industry and thermal power plants to connect or cut off the intermediate quality of pipelines. The sealing surface of the opening and closing device has compact structure and reasonable design.

• Our service tenet is customer first, service first. We will provide more accurate and efficient manufacturing and service according to customer requirements.
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• 100% inspection of Reduced Diameter Slab Gate Valve before shipment.
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• We have complete production technology and management.
• As a manufacturer our price is also good.

To be packed in suitable wooden cases as per client's

Q: The impact of valve reduction: Does it really affect water flow?

A: 1. The principle of valve reduction

Valve reducing is a simple, reliable and economical method for controlling pipeline fluid by adjusting the reducing device of the valve lining. The reducing device is usually composed of the reducing section, the transition section and the expanding section, and its function is to use the high-speed water flow in the reducing section to form a certain degree of negative pressure to achieve the purpose of flow regulation. In the transition section, the high-speed water flow gradually diffuses to the wider part of the reduced diameter section, reducing the speed and energy of the water flow, thus reducing the eddy current loss. Finally, the flow rate can be restored in the expanded section, and a stable flow rate can be obtained after the water passes through here.

2. The valve reduction of the water flow theory analysis

Now let's explore the effect of valve reduction on water flow. By theoretical calculation, the valve reduction does not provide additional resistance to the control of liquid flow, because the water flow in the valve reduction section has the same speed as the accelerated water flow. Only after the valve is closed, the reducing section has a certain resistance to the water flow, but the effect of the valve reducing on the water flow is small at this time. Therefore, valve sizing does not have a significant impact on water flow during normal operation.

3. Experiment to verify the effect of valve reduction on water flow

In order to confirm the above theory, we carried out experimental verification. In the laboratory, we used two pipes of different diameters, connected a valve and a water pump respectively, and installed different diameters of reducing devices. By changing the opening of the valve and the diameter of the reduced section, we record the flow rate of the pipeline. The results show that the flow rate of the pipeline does not change significantly under different diameters. This indicates that the effect of valve reduction on pipeline flow is negligible.

In summary, under normal operating conditions, the effect of valve reduction on pipeline water flow is negligible. Therefore, in pipeline engineering, the selection of valve reduction control valve opening is a reliable and economic choice.

Q: How is the fluid seal achieved? What is static seal and dynamic seal?

A: The sealing of the fluid is usually achieved by close contact between the sealing surface to prevent the passage of the fluid.

Static seal is also called fixed seal, which refers to the case of no relative movement between the sealed components. Usually static sealing is achieved by sealing gaskets. Dynamic seal is also called motion seal, which refers to the relative motion between the sealed components in the working state. Sealing filler is one of the main means to realize dynamic sealing. Sealing gasket and packing occupy a very important position in the whole valve sealing system, its role is to prevent the leakage of the sealed medium.

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