The arrow marked on the valve body indicates the recommended bearing direction of the valve, not the flow direction of the medium in the pipeline. The valve with bi-directional sealing function can not be marked with the indicating arrow, but also marked with the arrow, because the valve arrow refers to the recommended pressure direction, left and right or up and down the two directions always one direction is better.
The arrow direction marked on the valve body indicates the bearing direction of the valve, which is usually marked by the engineering installation company as the flow direction of the medium, resulting in leakage or even pipeline accidents;
Pressure direction refers to the valve is applied in the closed state of the pipeline working condition, the direction of the arrow of the valve body is recommended to bear pressure direction, if the wrong installation, there may be leakage failure phenomenon of the valve closed loosely. Super soft sealing ball valve is usually two-way sealing, usually do not mark the arrow, metal hard sealing ball valve can do two-way sealing, but there will be a direction of sealing performance is better, so there will be marked arrow, this is to recommend the direction of valve pressure, you can first consult the customer’s opinion.
Hard seal butterfly valve with marked with arrows in different position of the pipeline, the direction of the arrow flow are not the same with the media, such as water pump in the pump outlet ends, the body of the arrow to the flow direction of medium and is on the contrary, as in the water pump into the water, with the medium flow arrow is consistent, such as the installation in the head of the road, the flow direction of medium arrow general adaptation, etc., The specific conditions and installation position to determine.
Post time: Oct-18-2021