The plug valve with one-piece upper inlet design has many similarities to a one-piece upper inlet ball valve. Strictly speaking, the ball valve and the plug valve are the same types of valve due to their similar function and characteristics, and both have a wide range of applications. Today we are going to introduce the difference of plug valve and ball valve.
The plug valve also known as a tap valve, a rotating plug valve, is a type of old line valve. The combined "plug" (mostly conical or cylindrical) valve and the surface body of the conical seal hole move depending on the body of the plug around the center line of the valve to achieve open and close. It is mainly used to cut, distribute and change the media flow. The plug valve is simple in structure and small in size. It can be opened and closed only with 90% rotation. It is widely used in occasions of low pressure, small and medium diameter or low temperature. The sealing surface of the plug valve is easy to use, it is also easy to get stuck in case of high temperature or high pressure, it is not suitable to regulate the flow.
The ball valve evolves from the plug valve with a ball as its closing parts, towards the center of the valve to achieve opening and closing, which is mainly used to cut, distribute and change the flow direction of the medium. Ball valves can be sealed tightly only with 90 degrees of rotation or with a small torque. The full horizontal of the valve body cavity provides little resistance through the flow path for the medium. The main characteristics of the ball valve are the compact structure, easy to operate and maintenance, suitable for water, solvent, acid and natural gas and other general means, also suitable for working conditions of aggressive media, such as oxygen, peroxide hydrogen, methane and ethylene. theball valve The body can be a piece, it can also be combined. In general, ball valves are considered to be the most suitable for direct opening and closing, but recent developments have been designed for flow regulation and control.