Steam pressure relief valve manufacturers

TLV Steam Experts. 15813373096

Hello! There are many manufacturers of steam pressure regulators (saturated steam) available in the domestic market. Based on product quality and reputation, the following manufacturers are worth considering: 1. Zhangjiagang Caly Pressure Reducing Valve Co., Ltd.: This company is one of the earlier enterprises in China to engage in the production of pressure reducing valves; its products offer stable and reliable quality, and it enjoys a high level of recognition in the market. 2. Le’an Valve Group Co., Ltd.: This company boasts many years of experience in valve production, offers a wide range of products, and possesses strong technical capabilities; it is one of the more well-known valve manufacturers in China. 3. Kumho Group Co., Ltd.: Kumho Group is a large domestic valve manufacturing enterprise equipped with advanced production facilities and technical expertise; its product quality is widely recognized. Of course, choosing a manufacturer also requires comprehensive consideration based on specific needs and budget. One can search for information on these manufacturers’ products online and get in touch with their sales staff to learn more details, so as to make the best choice. I hope this can be helpful to you! .

Overview of Steam Pressure Reducers – Li Shaopeng, Technical Department, Hangzhou Watt Energy Saving Engineering Co., Ltd. A steam pressure reducer regulates the flow rate of steam by controlling the opening degree of the valve element inside it, thereby reducing the pressure of the medium. The opening degree of this valve element is adjusted based on the pressure behind the valve, so as to keep that pressure within a certain range. Additionally, the opening degree of the valve is adjusted in real time as the steam load changes, ensuring stable pressure downstream. The advantage of steam pressure reducers is their ability to maintain the outlet pressure and temperature within a specified range, even when the inlet pressure keeps changing. It can be seen that what determines the outlet pressure of the pressure reducing valve is primarily the speed of steam condensation, which is influenced by the steam load on the heat exchanger; when the load varies within a certain range, the pressure reducing valve adjusts its opening degree to control the outlet pressure. Currently, steam pressure relief valves available on the market can be classified by structure into directly-acting diaphragm type and directly-acting bellows type, pilot-spring diaphragm type and pilot-piston type, as well as lever-type pressure relief valves ； Based on the number of valve seats, they can be manually classified as single-seat and double-seat types ； Based on the position of the valve disc, they can be divided into direct-acting and reverse-acting types. The most widely used ones are directly-acting steam pressure regulators and pilot-operated steam pressure regulators. When a direct-acting steam pressure reducing valve is used in applications with high output pressures or large pipe diameters, and pressure regulation is achieved through a regulating spring, the stiffness of the spring must be very high; as a result, the output pressure fluctuates significantly when the flow rate changes, and the structural dimensions of the valve also increase. Therefore, direct-acting diaphragm pressure regulators and direct-acting bellows pressure regulators are generally used in applications with small diameters, low pressure differences, and low outlet pressures. The working principle of a pilot-operated steam pressure reducing valve is basically the same as that of a direct-acting one. The regulating steam used in pilot-operated pressure regulators is supplied by a small direct-acting pressure regulator. If a small direct-acting pressure reducing valve is installed inside the valve body, it is called an internal pilot-type pressure reducing valve ； If a small direct-acting pressure reducing valve is installed outside the main valve body, it is called an external pilot-operated pressure reducing valve. A steam pressure reducing valve is an automatic valve that uses the energy of the steam itself to regulate and control the pressure in the pipeline. The outlet pressure of the main valve can be adjusted by regulating the pressure reducing pilot valve. The outlet pressure does not change in response to variations in inlet pressure or steam flow rate; it maintains the outlet pressure at the set value in a safe and reliable manner, and the set value can be adjusted as needed to achieve pressure reduction. Pilot-operated steam pressure regulators are relatively accurate, feature stable performance, are safe and reliable, easy to install and adjust, and have a long service life. The pressure relief valve primarily controls the stable outlet pressure of the main valve; the outlet pressure of the main valve does not change as a result of changes in the inlet pressure, nor does it change due to variations in the flow rate at the main valve’s outlet. A. Due to the amplification effect of the main diaphragm, with proper selection, the steam pressure can be accurately controlled within a deviation range of 0.2 bar. B. Thanks to the balanced structure and downstream pressure feedback system, the pressure reducing valve is unaffected by changes in the upstream steam supply pressure, nor by changes in the downstream steam consumption load. It truly achieves the effect of pressure reduction and stabilization. C. The regulation ratio of the pressure reducing valve is relatively high; the flow rate regulation ratio can reach 10:1, while the pressure regulation ratio can reach 12:1. D. Compared to other types of pressure reducing valves, the Watt PRV2000 series has a high flow capacity. Moreover, the hardened valve core and seat enhance the service life of the pressure reducing valve, providing excellent resistance to erosion under light loads. Installation and maintenance of imported pressure reducing valves: 1. Pilot diaphragm type pressure reducing valves should be installed vertically in horizontal pipelines to prevent deformation in their operation due to local water accumulation. 2. When installing the steam pressure relief valve, care should be taken to ensure that the flow direction of the steam in the pipeline is consistent with the direction of the arrow indicated on the valve body. A steam filter with an online 100-mesh stainless steel filter screen should be installed in front of the pressure relief valve. 3. To prevent overpressure behind the valve, a pressure reducing valve should be installed at a distance of no less than 2 meters from the valve outlet. 4. The pressure measurement point at the rear of the steam pressure relief valve should be as far away as possible from other manual valves, in order to avoid frequent activation caused by pressure disturbances. 5. The pressure relief valve is the throttling point where the pressure drop in the steam system is greatest, with flow speeds as high as 200 meters per second; therefore, it is advisable to install a DF200 high-efficiency steam-water separator in front of the pressure relief valve. 6. For applications with large fluctuations in flow rate, parallel pressure reduction stations should be used for staged control ； For applications with an excessively high pressure reduction ratio (10:1), it is best to use a series of pressure reduction stations to achieve staged pressure reduction. The pressure relief valve cannot be selected simply based on the pipe diameter; it must be chosen taking into account parameters such as upstream and downstream pressures, steam flow rate, flow fluctuations, and the required pressure accuracy. The Watt PRV2000 pilot-diaphragm pressure relief valve is highly suitable for reducing and stabilizing the pressure of steam in critical industrial equipment, as well as for controlling the pressure in steam main lines or branches in workshops where there are significant fluctuations in load.