The arrow marked on the valve body is the recommended pressure bearing direction of the valve, not the flow direction of the pipeline medium. Valves with two-way sealing function may not mark the indicating arrow, or may mark the arrow, because the arrow of this valve refers to the recommended pressure bearing direction, and one of the two directions of left and right or up and down is always better.

      The direction of the arrow marked on the valve body indicates the pressure bearing direction of the valve, which is usually marked by the engineering installation company as the medium flow direction, resulting in leakage or even pipeline accidents caused by wrong installation;

     The pressure bearing direction refers to the closed state of the valve after it is applied to the pipeline working condition. The arrow direction of the valve body is the recommended pressure bearing direction. If it is installed incorrectly, there may be a leakage failure phenomenon that the valve is not closed tightly. Chaoda’s soft-sealed ball valves are usually two-way sealed, and arrows are usually not marked. Metal hard-sealed ball valves can achieve two-way sealing, but there is still a better sealing performance in one direction, so there will be marked arrows , which refers to the recommended pressure direction of the valve, you can consult the customer's opinion first.

     The direction of the hard-sealed butterfly valve with marked arrows is different from the flow direction of the medium in different positions of the pipeline. For example, at the outlet end of the pump in the pump room, the arrow of the valve body is opposite to the flow direction of the medium. At the water inlet end of the pump, the arrow is consistent with the flow direction of the medium. If it is installed on the main pipe, the arrow generally follows the flow direction of the medium, etc., depending on the working conditions and installation location.