Introduction and Application of Manual Gate Valve

2025-04-15 09:56:39

Manual gate valve is a form of operation of Gate valve. The following is its introduction and application related content:

introduce

Structural principle: Manual gate valves are mainly composed of valve body, gate plate, valve stem, valve seat, handwheel and other components. The gate moves up and down inside the valve body, and opens and closes the valve by tightly fitting with the valve seat, thereby controlling the flow of fluid in the pipeline. The handwheel is connected to the gate through the valve stem, and the operator rotates the handwheel to drive the valve stem to rotate, causing the gate to rise or fall.

characteristic

Easy to operate: No external power source is needed, the valve can be opened and closed by manually rotating the handwheel, which is simple, direct, and easy to master.

Simple structure: Compared to some valves with complex driving devices, manual gate valves have a simpler structure and fewer components, thus having higher reliability and relatively easy maintenance and upkeep.

Good sealing performance: Wedge gate or parallel gate structures are usually used, and the sealing surface is precision machined and ground to achieve good sealing effect and effectively prevent medium leakage.

Wide applicability: Different materials and sealing forms can be selected according to different working conditions, suitable for various media such as clean water, sewage, steam, oil, gas, and some corrosive media. The working pressure and temperature range is also wide.

application

Water supply and drainage system: In urban water supply and drainage pipelines, manual gate valves are commonly used to control the flow of water, in order to perform pipeline maintenance, upkeep, or regulate water volume. For example, the application of manual gate valves can be seen on the water supply pipelines of water plants and at various nodes of urban drainage networks.

Heating system: In centralized heating and heating systems, manual gate valves are used to regulate and control the flow of hot water or steam to meet the heating needs of different users. At the same time, during the maintenance and repair process of the system, the medium inside the pipeline can also be cut off by manual gate valves to ensure work safety.

Industrial pipeline systems: Manual gate valves are widely used in various process pipelines in industries such as chemical, petroleum, metallurgy, and power. Used to control the transportation of various fluid media, such as chemical raw materials, petroleum products, steam, compressed air, etc. Manual gate valves are widely used in some small industrial installations or auxiliary pipeline systems due to their convenient operation and low cost.

Fire protection system: In the fire protection system of buildings, manual gate valves are an important component. It is used to control the supply of fire water and is usually in a closed state. When a fire occurs, the gate valve can be manually opened to allow the fire water to quickly reach the fire extinguishing equipment, such as fire hydrants, sprinkler systems, etc.