Can a DN20 valve allow 400 cubic feet of air to flow through? ? ?
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For a DN20 valve with air as the medium, operating at room temperature, under normal pressure before the valve and negative pressure of 100–200 millipascals after the valve, with a maximum flow rate of 400 cubic meters per hour – will fluid be able to flow through it? How many CVs to choose? ? ?
As a supplement, a direct-acting single-seat control valve is required!
Millipascals? It should be mbar, right? The normal Cv is 43–60; a control valve with a diameter of at least DN65 should be used (with a rated Cv of around 70). 40NM3 is suitable for DN 20.