What is the difference between pilot operated and direct acting pressure reducing valves?

The pressure reducing valve adopts the opening degree of the opening and closing member in the control valve body to adjust the flow rate of the medium, reduces the pressure of the medium, and adjusts the opening degree of the opening and closing member by the action of the pressure behind the valve, so that the pressure behind the valve is maintained within a certain range. In the case of constant changes in import pressure, keep the outlet pressure within the set range and protect the subsequent production tools.

When the output pressure of the pressure reducing valve is high or the diameter is large, the pressure is directly adjusted by the pressure regulating spring, the spring stiffness is inevitably too large, and when the flow rate changes, the output pressure fluctuates greatly, and the structural size of the valve also increases. In order to overcome these disadvantages, a pilot operated pressure reducing valve can be employed. The working principle of the pilot type pressure reducing valve is basically the same as that of the direct acting type.

The pressure regulating gas used in the pilot type pressure reducing valve is supplied by a small direct acting pressure reducing valve. If the small direct acting pressure reducing valve is installed inside the valve body, it is called the internal pilot type pressure reducing valve; if the small direct acting pressure reducing valve is installed outside the main valve body, it is called the external pilot type pressure reducing valve. .

Compared with the direct-acting pressure reducing valve, the valve increases the nozzle baffle enlargement composed of the nozzle 4, the baffle 3, the fixed orifice 9 and the air chamber B. When the interval between the nozzle and the baffle changes slightly, the pressure in the B chamber changes significantly, causing the diaphragm 10 to have a large displacement, moving up and down the control spool 6 to advance The valve port 8 is opened or closed, and the sensitivity to the control of the spool is improved, that is, the voltage regulation accuracy is improved.

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Shandong Chunyu Water-saving Irrigation Equipment Co., Ltd., founded in 2011, is located in Laiwu High-tech Zone, Jinan City. It is a high-tech enterprise focusing on innovative and efficient emitter mold manufacturing and emitter product research and development and production. After nearly ten years of innovation and development, it is the invisible champion enterprise in Shandong Province, and now it is in a leading position in this field in China.

Spring rain people-oriented, build talent highland. At present, the company has 16 high, fine and advanced technical personnel, and cooperates with a number of scientific research institutes, forming a mold design, emitter testing, flow testing and other professional technical personnel team. In recent years, it has obtained 3 invention patents, 33 utility model patents and 3 patent awards. In 2019, it was identified as an intellectual property advantage enterprise in Jinan. It has undertaken 4 provincial science and technology innovation projects and won 2 second prizes of Shandong Science and Technology Progress Award. The company has built Jinan drip emitter mold engineering technology research center, the company has a slow wire cutting, CNC machining center, precision EDM machine, 3D projection measuring instrument, CNC engraving, laser engraving and other advanced processing equipment. Mature technology and rich experience support the excellent quality of Chunyu. Spring Rain pays attention to every link of production, implements 8S management, strictly controls the quality of products at the beginning, the middle and the end, and forms the seamless link of production management. The company has independently researched and developed flat emitter molds with full hot runner, cylindrical emitter molds with full hot runner and other products. With excellent quality, competitive price and good after-sales service, the company is well known at home and abroad, and has been sold well in Egypt, India, Iran, Turkey, Saudi Arabia, the United States and other countries.

With the vision of "building a global professional emitter mold supplier" and the mission of "providing solutions for efficient and innovative production of global water-saving irrigation enterprises", the company takes "scientific and technological innovation to scale new heights; Keep improving, the pursuit of excellence; Honesty and trustworthiness, win-win cooperation "for the values of the enterprise. For the construction of water - saving and resource-saving society to make a positive contribution.

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Shandong Spring Rain Water Saving Irrigation Equipment Co.,Ltd. , https://www.drippermould.com