The direction of the arrow marked on the valve body indicates the pressure bearing direction of the valve, which is generally used by engineering equipment companies as the symbol of the medium flow direction. The faulty device leaks and even causes pipeline accidents;
The pressure bearing direction refers to the direction of the valve body arrow in the closed state after the valve is applied to the pipeline condition.If the installation is wrong, there may be a leakage problem that the valve is not tightly closed.
Chaoda's soft-sealed ball valve is generally two-way sealed, and the arrow is generally not marked. The metal hard-sealed ball valve can achieve two-way sealing, but it still has a better sealing function in one direction, so it will also be marked. The arrow out, this is the direction of the recommended valve pressure, you can first consult the customer's opinion.
The hard sealing butterfly valve with the marked arrow is in different directions of the pipeline, and the direction of the arrow and the flow direction of the medium are not the same.
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. For example, at the inlet end of the pump, the arrow and the flow direction of the medium are the same. If it is installed on the main line, the arrow generally conforms to the medium. The flow direction, etc., depends on the working conditions and the orientation of the device.
