A gas valve, the flow can be set manually eg 2500g/s, by typing in a number, when set, a dupe will change the valve according to a schedule.  If a valves flow is copied and then applied to any other gas valve, the valve will never get changed by a dupe, it will remain at it's original value, despite showing the pasted value.  To change a valve's flow rate, each valve must be set manually.  A valve can have a value pasted, but, the value must be selected first and then the Return key must be
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