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2022

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08

What do the arrows on the valve mean? Don’t get it wrong again!

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The direction of the arrow marked on the valve body indicates the pressure-bearing direction of the valve, which is generally used by engineering installation companies as a symbol of the flow direction of the medium. Incorrect installation may lead to leakage and even cause pipeline accidents;

The direction of the arrow marked on the valve body indicates the pressure-bearing direction of the valve, which is generally used by engineering installation companies as a symbol of the flow direction of the medium. Incorrect installation may lead to leakage and even cause pipeline accidents;

 

The pressure-bearing direction refers to the closed state of the valve after it is used in pipeline conditions. The direction of the arrow on the valve body is the direction in which the pressure is recommended. If installed incorrectly, leakage failure may occur due to lax sealing of the valve. Chaoda's soft-sealed ball valves are generally bi-directionally sealed and are generally not marked with arrows. Metal hard-sealed ball valves can achieve bi-directional sealing, but there will still be a direction where the sealing performance is better, so there will also be a mark. The arrow shown indicates the pressure-bearing direction of the recommended valve. You can consult the customer first.

 


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