What are the emphasis on the installation of the threaded ball valve and the installation of the sanitary ball valve?

What are the emphasis on the installation of the threaded ball valve and the installation of the sanitary ball valve? The general ball valve does not indicate the direction and can be installed at will. In principle, the ball valve has no direction, but in actual installation, in order to prevent excessive leakage between the valve body and the bonnet, usually the ball valve body is generally connected to the direction of the tank or the material. Some ball valves are directional, and are generally marked on the ball valve, and a good seal cannot be achieved if it is installed. There are two types of ball valves: one-way sealing ball valve and two-way sealing ball valve. The former has directionality. If it is installed reversely, the sealing under full pressure difference cannot be guaranteed, while the latter has no directionality. In terms of structure, there are two-way sealing and one-way sealing: two-way sealing generally has no flow direction requirements, and one-way sealing has flow direction requirements. If it is a manual ball valve, there is no direction, but if it is a control valve, there is a direction. V-shaped ball valves and eccentric hemispherical valves are all directional. Generally, the medium flow direction mark is marked on the valve body. Floating ball valves and fixed ball valves are bidirectional, while eccentric half ball valves, V-shaped ball valves, and poppet-stem orbital ball valves are unidirectional. Ball valves are divided into O-shaped ball valves and V-shaped ball valves. The O-type ball valve adopts a floating structure, the core is a precision casting, the surface is plated with hard chromium, and the valve seat is made of reinforced polytetrafluoroethylene. Leakage, generally used as on-off valve, especially suitable for high-viscosity, fiber-containing, granular media; V-shaped ball valve adopts a fixed structure, with a V-shaped cut on the ball core, which can achieve proportional adjustment, and the flow characteristics are approximately equal percentages. The flow of the medium is on the valve body. As a user, O-shaped ball valves are generally used for on-off, basically two-way sealing, so there is no direction requirement; V-shaped ball valves are used for control, usually one-way sealing, and there are directional requirements. In actual use, the characteristics of each product may be different. You only need to see if 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, you need to install the instructions to achieve a good sealing effect.