Valves in Heating Engineering
Valves are very important elements of the fluid control system, and they are widely used in the power industry, chemical industry, metallurgical industry and other production processes. Heating engineering also requires the application of valves to regulate the flow of steam, water, gas and other media in the system. There are many kinds of valves used in the heating industry, such as ball valves, butterfly valves, gate valves, globe valves, check valves, safety relief valves, etc.
Ball Valve
Ball valve is one of the most commonly used valves, with a wide range of applications. The ball valve structure can be divided into floating ball valve and trunnion type ball valve. The sealing structure is O-shaped ring or V-shaped. According to the action principle, it can be divided into manual valve and electric valve. Ball valve has the advantages of small flow resistance, good sealing performance, simple structure and easy maintenance and repair. It is used in heating engineering as a flow regulating control valve or a shut-off valve.
Butterfly Valve
Butterfly valve is a kind of valve which has light structure, small size and convenient operation. It is usually composed of bushing, disc and transmission mechanism. The butterfly valve is an a-type structure. The disc is of disc-shaped structure, which is installed inside the valve body, and is driven to rotate around its own axis to realize the opening and closing of the valve and regulate the flow. Butterfly valves are usually manually operated, and there are also some with electric and pneumatic actuators for remote control. They are widely used in heating engineering for flow regulation and shut-off.
Gate Valve
The gate valve is also a traditional valve, with a simple structure and reliable performance. It consists of a valve body, a bonnet, a disc and a stem, and is equipped with a sealing ring and a packing seal. Gate valves have a wide range of applications and are used as shut-off valves in heating engineering.
Globe Valve
Globe valve is a kind of valve with flow regulating function and slight throttling effect. It is an important part of controlling the flow of fluid. It is composed of disc, stem, body and gland. Globe valve is represented by famous brand Worcester type valve. It is often used for flow regulation in heating engineering.
Check Valve
Check valves are used in many engineering processes to prevent backward flow. It is composed of a valve body, a sealing element, a valve cover and a stem. The check valve is closed when the fluid flows in one direction, and is opened when the fluid flows in the other direction. Generally, in the heating engineering process, check valves are used to prevent the return flow of water and steam, so as to ensure the normal operation of the system.
Safety Relief Valve
Safety relief valves are used to protect the pressure of the system and its equipment from exceeding the design value of the design pressure. It is composed of a valve body, a closure member and an actuator. The main function of the Safety relief valve is to open automatically when the pressure of the system exceeds the set value, and the excess pressure is discharged. It is generally used in various pressure systems of heating engineering to protect the safety of equipment and personnel.
In conclusion, the application of valves in heating engineering is very important, which can help to control the flow of steam, water, gas and other media in the system. Different valve types serve different purposes, such as ball valve for flow regulating control, butterfly valve for flow regulation and shut-off, gate valve for shut-off, globe valve for flow regulating, check valve for preventing backflow, and safety relief valve for protecting the pressure of the system.
