What Is Flange Valve

The flange valve is an important accessory for controlling the flow of the medium on the chemical pipeline. Its basic function is to cut off the flow of the pipeline medium, change the flow of the medium, change the flow direction of the medium, adjust the pressure and flow of the medium, and protect the pipeline and equipment The normal progress.

　　 With the continuous development of modern industry, the demand for valves is increasing, and a coal chemical plant needs a large number of various valves. Valves are used in large quantities and frequently open and close. Often due to improper manufacturing, use, selection, and maintenance, running, emitting, dripping, and leaking occur, which can cause flames, poisoning, scalding accidents, or cause poor product quality and increased energy consumption. , Equipment corrosion, environmental pollution, and even cause accidents such as production shutdown.

　　 Classification of flange valves

　　Flange valves are widely used and have many classification methods. According to the function of the valve, the valve can be divided into the following categories:

　　1, opening and closing are used to cut off or communicate the flow of fluid in the pipe one by one;

　　2, adjust the flow and flow rate in the pipe one by one;

　　3, non-return with one-way medium flow;

　　4. Others one by one a. Automatic opening and closing b to maintain a certain pressure c to block air and drain.

According to the driving method, it can be divided into two categories:

　　 The first category is automatic valves: valves that rely on the ability of the medium (fluid, gas) to act on their own, such as check valves, safety valves, regulating valves, traps, pressure reducing valves, etc.

　　 The second category is to drive valves: valves that operate manually, electrically, hydraulically, and pneumatically. Such as gate valve, globe valve, throttle valve, butterfly valve, ball valve, plug valve, etc.