Minimum distance between flow restriction orifice plates
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I’m facing another problem: how is the minimum distance between valves and flow control orifice plates determined in PID diagrams? I’ve seen values of min500m and min200m; I’d like to know how these values are determined. Is the purpose of the flow control orifice plate to reduce the flow rate? Does it have an effect on lowering blood pressure? I also hope the experts can give me more guidance.
It has an antihypertensive effect. If it is only for flow limitation and not a flow meter, then distance is not a requirement. It just needs to be easy to install.
I’d like to add one more thing: under what circumstances should one consider using flow restriction orifice plates? I hope the experts can give me some guidance
Why isn’t anyone replying? Let’s discuss it together and learn from it.
When the volumetric flow rate remains constant, and considering fluid continuity, the flow velocity does not decrease after passing through the orifice plate; if it is a compressible fluid, it even increases after pressure reduction. Orifice plates can be used only for pressure reduction or flow restriction. To reduce pressure, the pressure drop at the operating flow rate must be calculated in order to select the appropriate orifice plate; for flow restriction, the orifice plate should be chosen based on the critical flow rate at the operating pressure difference. Regarding the installation spacing, for orifice plate flowmeters, there are very detailed installation requirements that depend on the pipeline diameter as well as the type of fittings located upstream of the orifice plate. If it is merely a flow-limiting or pressure-reducing orifice plate, it has no special requirements of its own, unless there are specific demands from the components upstream and downstream of it. The above are purely personal opinions.
You mean that when installing flow restriction orifice plates, there isn’t necessarily a required minimum distance; in fact, there are no strict regulations regarding this, is that what you mean? Thank you
Yes, orifice plates are used for flow restriction and pressure reduction, and generally there is no requirement for a minimum pipe length.
Oh, I see, thank you:handshake