The necessary condition is a valve approved by the technical supervision

Pressure relief cpvc globe valve When the pressure in the pipeline is greater than the set pressure of the pressure relief valve, the oil will flow out of the pressure relief valve, so that the pressure in the control pipeline will not exceed a certain limit value. The needle pressure relief valve adjusts the pressing force by adjusting the length of the spring force in the valve.

When the pressure in the pipeline is higher than the set value, the spring is compressed in the opposite direction, so that the sealing thimble opens and the oil leaks out. Play the role of protecting equipment and regulating system pressure.

The so-called safety valve in a broad sense includes a pressure relief valve. From the perspective of management rules, it is directly installed on a steam boiler or a type of pressure vessel. The necessary condition is a valve approved by the technical supervision department. In a narrow sense, it is called safety Valves, others are generally called relief valves. The difference between safety valve and pressure relief valve Safety valve and pressure relief valve are very similar in structure and performance.

Both of them automatically discharge the internal medium when the opening pressure is exceeded to ensure the safety of the production device. Because of this essential similarity, people often confuse the two when using them. In addition, some production devices also stipulate that either type can be used in the rules. Therefore, the difference between the two is often overlooked. As a result, many questions have arisen.

According to the definition set out in the first article of 'ASME Boiler and Pressure Vessel Code' to understand: (1) Safety Valve (Safety Valve) is an automatic pressure relief device driven by the static pressure of the medium in front of the valve. It is characterized by a sudden full opening action. Used in gas or steam applications. (2) Relief Valve, also known as overflow valve, is an automatic pressure relief device driven by the static pressure of the medium in front of the valve. It opens proportionally as the pressure exceeds the opening force. Mainly used in fluid applications.