The working principle of the bellows can be clearly understood from the structural diagram: the valve stem runs through the bellows, the lower end of the bellows is welded to the valve stem, and the upper end is welded to the fixed plate. A through hole slightly larger than the diameter of the valve stem is set in the center of the fixed plate. During the valve installation process, the sealing ga…

A safety valve (SV) is a spring-loaded pressure relief device that is driven by the static pressure of the upstream medium and has the characteristic of opening quickly or "tripping". This type of valve is mainly used for compressible fluids, especially steam systems. According to the certification standards, safety valves can effectively protect equipment from damage under overpressure conditions…

A pilot-operated safety relief valve is a pressure control device in which the main relief component (main valve) is used in conjunction with a self-operated auxiliary pressure control device called a pilot valve, which controls the opening and closing of the main valve. Pilot-operated safety relief valves can be fast-acting or regulating, corresponding to pop-up pilot valves and regulating pilot …

Pressure relief valves have been around for hundreds of years, and they have always played a very important role as the last line of defense to protect life and property in the event of an overpressure event. This article will introduce three types of pressure relief valves in three parts. In the first article, we will introduce the basic operation of spring-loaded safety relief valves. In future…

By rotating the ball 90° or 180°, the connection relationship between its internal channel and the four valve body ports is changed to achieve the switching, confluence or diversion of the fluid flow direction.…

Flow meter valve group: front and rear cut-off valves are installed before and after the flow meter, and bypass valves are used to bridge the front and rear cut-off valves. The front and rear cut-off valves use stop valves or gate valves, and the bypass valve uses a throttle valve to accurately adjust the flow.…

The throttle valve is an important hydraulic control component that can control the movement speed of the actuator by changing the flow rate of the liquid. This valve is widely used in many industrial fields, including machine tools, engineering machinery, aerospace, plastic machinery and metallurgical equipment. This article will introduce in detail the application and role of throttle valves in …

Differences and differences between pressure reducing valve, safety valve, pressure stabilizing valve and pressure relief valve…