The working principle of a water pressure reducing valve is based on the throttling effect of the opening and closing components. By adjusting the opening of the opening and closing components, the flow rate of the medium can be changed, thereby reducing the pressure of the medium. At the same time, the opening of the opening and closing components can be adjusted by the pressure behind the valve to maintain a certain range of pressure behind the valve. When the inlet pressure and outlet flow rate vary within a certain range, it can automatically maintain the outlet pressure within a certain range by utilizing its own energy. The membrane type water pressure reducing valve, piston type water pressure reducing valve, stainless steel water pressure reducing valve, pilot operated water pressure reducing valve, groove water pressure reducing valve, adjustable water pressure reducing valve, and spring water pressure reducing valve produced by Zhejiang Shanliu Valve Technology are widely used in water plants, buildings, fire pipelines, etc.

Branch pressure reducing valves, as the name suggests, are mainly used on small diameter branch pipes or branch pipes of large diameter automatic valves, as pilot valves or control valves. The pressure of branch pressure reducing valves generally does not exceed PN25, and the diameter does not exceed DN100. The working principle of a branch pressure reducing valve is to adjust the inlet pressure to a desired outlet pressure, and rely on the energy of the medium itself and the spring to automatically maintain stable outlet pressure. The specific working principle of stainless steel branch pressure reducing valves, brass branch pressure reducing valves, direct acting spring branch pressure reducing valves, thin film branch pressure reducing valves, cast steel adjustable branch pressure reducing valves produced by Zhejiang Shanliu Valve Technology is to change the throttling area to change the flow rate and fluid dynamic energy, thereby causing different pressure losses and achieving the purpose of pressure reduction. The pressure reducing quality of the product is stable, and the streamlined appearance is more exquisite.

A gas pressure reducing valve is a specialized device that automatically reduces the working pressure of a pipeline. It can reduce the high gas pressure in the pipeline upstream of the valve to the required level in the pipeline downstream of the valve. A gas pressure reducing valve is an automatic control device that utilizes the energy of the medium itself to regulate the pipeline pressure. The core function of gas pressure reducing valves, such as oxygen pressure reducing valves, nitrogen pressure reducing valves, argon pressure reducing valves, stainless steel pressure reducing valves, piston-type high-pressure gas pressure reducing valves, ammonia pressure reducing valves, brass gas pressure reducing valves, and electric gas pressure reducing valves produced by Zhejiang Shanliu Valve Technology, is to precisely reduce the unstable high-pressure gas at the inlet side to the required stable low pressure at the outlet side, and the outlet pressure is not affected by fluctuations in inlet pressure and changes in flow rate. Gas pressure reducing valves are mainly suitable for gas media such as air, hydrogen, oxygen, nitrogen, argon, helium, carbon dioxide, and methane.

Steam pressure reducing valves adjust the flow of the medium by controlling the opening of the internal components within the valve body, reducing the pressure of the medium. At the same time, they utilize the downstream pressure to regulate the opening of the components, ensuring that the downstream pressure remains within a certain range. This maintains the outlet pressure within a set range even when the inlet pressure varies, protecting downstream domestic and industrial appliances. Products manufactured by Zhejiang Shanliu Valve Technology, including piston-type steam pressure reducing valves, stainless steel steam pressure reducing valves, cast steel steam pressure reducing valves, pilot-operated steam pressure reducing valves, Luo-Mo-V steel steam pressure reducing valves, electronic electric steam pressure reducing valves, and forged steel steam pressure reducing valves, are widely used in steam pipelines across various industries such as petroleum, chemical, power, environmental protection, water conservancy, heating, water supply and drainage, industry, and machinery.