The flow-limiting plate (ring) cannot limit the flow
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Dear managers, I have connected 10 separate water channels to my flow distributor, each with its own flow-limiting orifice (similar to the quick-connect water channels used in air systems). The quick-connect fittings contain the flow-limiting rings shown in Figure 1; within these rings, there is an O-ring from Figure 2 inserted into the larger hole. The inner diameter of this O-ring matches that of the flow-limiting orifice, although the diameters of the various orifices are different. After nearly 40,000 hours of use, I’ve encountered problems with poor water flow in the areas where cooling is required according to my process requirements. Another company within our group resolved this issue by removing the O-ring from Figure 2, and flow rates remained essentially unchanged. However, when I did the same here, the flow meter showed the maximum value possible (it used to display 40 L/minute under normal conditions, but after removing the O-ring it showed 240 L/minute). The flow-limiting orifices themselves are not damaged, but the flow rate is extremely high. I would like to ask everyone what could be causing this problem?
The aperture size and the pressure difference before and after the orifice plate should be carefully checked; if these remain unchanged, the flow rate will not change
The inner diameter of the O-ring embedded in the flow control ring appears to be the same as that of the flow control ring’s inner diameter, and there are no pressure detection devices at either end of the flow control ring.
Use a vernier caliper to measure the diameter; the pressure difference before and after depends on the operating conditions
If this O-ring is removed, there will be severe overflow – why is that?