The working principle and selection of CKD pressure reducing valve

Working principle and selection of CKD pressure reducing valve

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The CKD Pressure Relief Valve is a special device that automatically reduces the working pressure of the line. It reduces the higher water pressure in the front line of the valve to the level required for the post-valve line. Pressure reducing valves are widely used in high-rise buildings, urban water supply networks, water pressure areas, mines and other occasions to ensure that the water supply system in the water supply system to obtain appropriate service water pressure and flow. Since the water leakage rate and the degree of waste are almost proportional to the water pressure of the water supply system, the pressure reducing valve has an improved system operating condition and potential water saving effect, and the water saving effect is about 30% according to statistics. This valve is best used to adjust the accuracy level.

There are many types of pressure reducing valves, and conventionally, there are membrane type, inner spring piston type and the like. The basic working principle of the pressure reducing valve is to reduce the water pressure by the local resistance of the flow passage in the valve to the water flow. The range of the water pressure drop is automatically adjusted by connecting the diaphragm of the valve flap or the inlet and outlet water pressure difference on both sides of the piston.

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According to the requirements of use, the type of pressure reducing valve and the pressure regulation accuracy are selected, and then the diameter is selected according to the required maximum output flow rate. When determining the air supply pressure of the valve, it should be greater than the maximum output pressure of 0.1 MPa. The pressure reducing valve is generally installed after the water separator, before the oil mister or the constant value device, and be careful not to reverse the inlet and outlet; when the valve is not in use, the knob should be loosened to prevent the diaphragm from being constantly deformed by pressure. Its performance.
For ease of operation and maintenance, the valve is typically mounted upright on a horizontal pipe.

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The CKD pressure reducing valve must be installed in strict accordance with the direction of the arrow on the valve body to maintain the direction of fluid flow. If the water quality is not clean and contains some impurities, an Italian filter must be installed at the upstream inlet of the OR pressure reducing valve (we recommend a filtration accuracy of not less than 0.5 mm).

In order to prevent post-valve pressure overpressure, an OR pressure reducing valve should be installed at not less than 4M from the valve outlet. The Italian pressure reducing valve plays a certain role in the pipeline. In order to prevent the damage of the water hammer, a small expansion tank can also be installed to prevent damage to the pipeline and the valve. The filter must be installed in front of the inlet pipe of the pressure reducing valve. The expansion tank must be installed after the relief valve outlet.

If you need to install the OR pressure reducing valve in the hot water system, you must install an Italian OR check valve between the pressure reducing valve and the expansion tank. In this way, the expansion tank can absorb the volume of water increased due to thermal expansion, and can prevent the influence of hot water return or pressure fluctuation on the pressure reducing valve, and ensure the long-term normal operation of the pressure reducing valve.

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CKD Pressure Reducing Valve Function and Use: Pressure reducing valve is an intelligent valve that uses the energy of the medium to regulate and control the pressure of the pipeline. It is used for domestic water supply, fire water supply and other industrial water supply systems. The outlet pressure of the main valve can be adjusted by adjusting the valve pressure reducing pilot valve. The outlet pressure does not change due to changes in inlet pressure and inlet flow rate. It is safe and reliable to maintain the outlet pressure on the set plant, and the set value can be adjusted as needed to achieve the purpose of decompression. The valve has precise decompression, stable performance, safety and reliability, convenient installation and adjustment, and long service life.