does ball valve have flow direction

- Apr 01, 2019-

does ball valve have flow direction


General ball valves do not indicate the direction, can be installed at will. In principle, the ball valve has no direction, but in order to prevent the leakage between the valve body and the valve cover from being too large, the ball valve body is usually connected with the direction of the tank or material. Some ball valves have directionality and are generally marked on the ball valves, which fail to achieve good sealing. There are two kinds of ball valves, one-way sealed ball valve and two-way sealed ball valve. The former has directionality, and the latter has no directionality if installed in reverse. There are two-way seals and one-way seals in structure: two-way seals generally have no flow direction requirement, one-way seals have flow direction requirement. Manual ball valves have no direction, but control valves have direction. V-type ball valves and eccentric hemispherical valves are directional, and generally mark the direction of medium flow in the valve body. Floating ball valves and fixed ball valves are bidirectional, while eccentric hemisphere valves, V-shaped ball valves and lifting stem track ball valves are unidirectional. Ball valves are divided into O-type ball valves and V-type ball valves. O-type ball valve adopts floating structure, ball core is precision casting, hard chromium plating on the surface, and seat is made of reinforced PTFE material. The orifice of the runner is the same as the orifice of the pipeline, the flow capacity is very large, the flow resistance is very small, and there is no leakage when closing. It is generally used as a switch valve, especially for high viscosity, containing fibers and granular media. V-notch, can achieve proportional adjustment, flow characteristics of approximately equal percentage. The medium flows to the valve body. As a user, O-type ball valves are generally used for switching, basically two-way sealing, so there is no direction requirement; V-type ball valves are used for control, generally one-way sealing, with direction requirements. In actual use, the characteristics of each product may be different, just depending on whether there is flow direction indication on the valve body, if not, it is bidirectional seal, no installation direction requirements. If so, it is necessary to install the instruction installation to achieve good sealing effect.


Trunnion Mounted Ball Valve