Valves are widely used in various industries such as petroleum, petrochemical, chemical, metallurgy, electric power, water conservancy, urban construction, fire protection, machinery, coal, food and other industries (among which, users in the machinery and chemical industries are most concerned about the valve market and have higher requirements for valves). Currently, the most commonly used valve varieties in the industry are ball valves, gate valves, globe valves, butterfly valves, and regulating valves.
The application of valves is extensive, and industries including machinery, metallurgy, petrochemicals, chemicals, and urban construction use the most types of valves. In particular, in the machinery industry, various valves are basically applied. Besides the machinery industry:
Butterfly valves are mainly used in petrochemicals and metallurgy; diaphragm valves are mainly used in metallurgy, electric power, and chemical industry; check valves are mainly used in metallurgy, chemical industry, and petrochemicals; globe valves are mainly used in petroleum and chemical industry; throttle valves are mainly used in metallurgy, petrochemicals, chemical industry and electric power; discharge valves are mainly used in petrochemicals and chemical industry; ball valves are mainly used in petroleum, chemical industry and metallurgy.
Gate valves are mainly used in chemical industry, electric power and urban construction; regulating valves are mainly used in chemical industry, metallurgy, electric power and food industry; plunger valves are mainly used in petrochemicals and metallurgy; rotary valves are mainly used in chemical industry and metallurgy; pressure reducing valves are mainly used in petrochemicals, chemical industry and metallurgy; steam traps are mainly used in chemical industry and petrochemicals.
The continuous development of various industries also requires more valve companies to develop and produce valves that are in line with the international market, thus continuously promoting the development of the entire valve industry towards high-tech practical technology.
The gate valve is the most common form of valve in the industry. When the gate is lifted, the fluid in the pipeline begins to flow. The gate valve is designed to be fully open or closed; they are usually used as shut-off valves for isolating pipeline systems. When the gate valve is opened, there is no blockage in the flow path and the friction loss is very small or non-existent. When it is necessary for the fluid to flow in a straight line and to be minimally restricted, a gate valve china can be used. Gate valves are usually controlled by handwheels, pneumatic diaphragms, electric motors, or piston mechanisms.
Globe valves are used to control the flow in pipelines. Unlike the "fully open or fully closed" function of gate valves, globe valves are adjusted by the position of a movable disc (or plug) relative to a fixed seat. The port of the globe valve can be straight or at an angle. This type of angle-feeding valve is typically used for easily solidifying, corrosive, or viscous fluids.
The needle valve is essentially a type of globe valve used to control flow very finely. The needle valve contains a slender conical plug, which can precisely adjust the flow rate.
Butterfly valves are designed to regulate flow, but their control capabilities are limited. The butterfly valve wholesale is a relatively simple industrial valve that only needs to be rotated 90 degrees with a handle to operate.
A check valve, also known as an NRV, only allows fluids to flow in one direction, and its purpose is to prevent backflow. There are many types of "stop mechanisms" that can prevent backflow in check valves. Ball check valves and piston check valves work with the minimum pressure. The backflow force is insufficient to carry the ball or piston in the opposite direction. The flow in a rotating check valve china pushes the hinged valve disc that only opens in one direction, ensuring that the fluid does not flow backwards.
The safety valve, also known as a relief valve, is an industrial valve and accessory whose installation purpose is to limit the pressure in the system. This type of angled gas valve is strictly used to prevent overpressure that could cause system damage.
The ball valve has a very good closing function. A simple 90-degree rotation of the handle can fully open or close the valve. This feature minimizes the operating time of the valve and reduces the possibility of leakage caused by seal wear.