Is the installation direction of the ball valve correct?

Generally, the ball valve does not indicate the direction and can be installed at will. Theoretically speaking, the ball valve has no direction, but in actual installation, in order to prevent the leakage between the valve body and the bonnet from being too large, the valve body of the ball valve is usually connected with the direction of the tank or the material. Some ball valves are directional and are generally marked on the ball valves. If they are installed, they cannot achieve good sealing. Ball valves are divided into one-way sealed ball valves and two-way sealed ball valves. The former has directionality, and if it is installed backwards, it cannot guarantee the sealing under the condition of full pressure difference, while the latter has no directionality. There are two-way seals and one-way seals in structure: two-way seals generally have no flow direction requirements, while one-way seals have flow direction requirements. If it is a manual ball valve, there is no direction; if it is a control valve, there is a direction. V-ball valves and eccentric semi-ball valves are directional, and the general valve body is marked with the mark of medium flow direction. The floating ball valve and the fixed ball valve are bidirectional, and the eccentric half ball valve, the V-shaped ball valve and the lifting rod track ball valve are unidirectional. Ball valves are divided into O-type ball valves and V-type ball valves. O-type ball valve adopts floating structure, the ball core is precision cast, the surface is plated with hard chromium, the valve seat is made of reinforced PTFE material, the orifice has the same diameter as the pipeline, the flow capacity is large, the flow resistance is small, and there is no leakage when it is closed. Generally used as an on-off valve, especially suitable for high viscosity, fibrous and granular media. V-shaped ball valve adopts fixed structure, with V-shaped notch on the ball core, which can realize proportional adjustment and approximate equal percentage of flow characteristics. Its medium flows on the valve body. As a user, O-ball valves are generally used for switching, which are basically bi-directional sealing and cannot meet the direction requirements; V-ball valve is used for control, which is generally one-way sealed and has direction requirements. In actual use, the characteristics of each supplied product may be different, only depending on whether there is a flow direction indicator on the valve body, if not, it is a two-way seal, and there is no installation direction requirement. If so, it is necessary to install its indicating device to achieve good sealing effect.