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A self-operated control valve is a valve that does not require an external power supply or control system, but relies on the fluid's own pressure and temperature changes to achieve automatic regulation. With the continuous improvement of industrial automation, self-operated control valves are increasingly used in industries such as petroleum, chemical, electric power, and metallurgy. This article will explore the technical progress and future trends of self-operated control valves.

A pneumatic valve is an automatic control valve driven by pneumatic force. Its working principle is based on the pneumatic force amplification principle and the cut-off principle. When the air source pressure acts on the pneumatic actuator, the air source pressure is amplified through the boost effect, thereby driving the valve to open or close.

Wafer check valve, as a common pipeline valve, has been widely used in industrial pipeline systems due to its compact structure, easy installation, good sealing performance, etc. The following are the installation and maintenance points of wafer check valve to ensure its long-term stable operation.

In the industrial production process, valves, as control components in fluid pipeline systems, play a vital role in ensuring the normal operation of the system. Valves can control the flow, pressure and flow direction of the medium according to the working conditions. In recent years, with the continuous improvement of industrial automation, the requirements for valve performance have become higher and higher. As a new type of valve, cast iron float valves have gradually attracted market attention for their superior performance. This article will compare and study cast iron float valves with traditional valves, analyze their advantages and disadvantages, and provide reference for engineering applications.