The ball valves are divided into floating ball valve, fixed ball valve, V type track three ball valve, stainless steel ball valve, cast steel valve, forged steel ball valve, ash unloading valve, anti sulfur ball valves, pneumatic ball valves, electric ball valve, ball valve, ball valve sleeve welding.
According to the shell / main material classification, the ball valve can be divided into:
1. Metal valves: such as carbon steel valves, alloy steel valves, stainless steel valves, cast iron valves, titanium valves, Monel valves, copper alloy valves, Aluminum Alloy valves, lead alloy valves etc..
2. Metal body lining valve: such as lining valve, lining valve, lining valve, lining valve and lining valve.
3. Non-metallic materials valves: such as ceramic valves, glass valves, plastic valves.
More ball valves Domestic manufacturers, most of the connection size is not uniform. The main categories are divided into the following categories:
Ball valve is floating, in the media under pressure, the ball can produce a certain displacement, and tight pressure on the outlet at the end of the sealing surface, to ensure that the export end seal.
Ball valve structure
Good sealing, but the ball under the load of all media work to export ring, so to consider the ring material can withstand the work load of the sphere medium, under high pressure shock, the ball may shift. This structure is generally used for medium and low pressure ball valves.
Ball valve is fixed, the pressure does not produce movement. Fixed ball valve has a floating seat, pressure by the media, the valve seat to move, so that the sealing ring tightly pressed on the sphere, to ensure sealing.
In order to reduce the valve operating torque and increase the reliability of the seal, valve seal has emerged, both pressure injection of a special lubricant in the sealing surface, to form a layer of film that enhances the sealing, and reduce operating torque, more suitable for large-diameter high-pressure valve.