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Fidd · 10-02-23, 11:39 AM

61. Valve open/closed position earlier in rotation that full movement.

Having the closed position slightly earlier in the rotation in the closing sense, [edit: and vice versa for opening] would help prevent valves being left fractionally open or closed causing unwanted water being introduced into into tanks, or conversely, prevent air being blown into them. It is usual, at least with domestic plumbing, for taps (faucets) to have a delay in causing water to flow when a tap is opened, and likewise to cease the flow before the tap is fully closed. To my mind this is how our valves should be operating, in order that a positive closure or opening of the valve occurs.

10-02-23, 11:39 AM	#76
Fidd XO Join Date: Apr 2005 Location: Blighty! Posts: 437 Downloads: 10 Uploads: 0	61. Valve open/closed position earlier in rotation that full movement. Having the closed position slightly earlier in the rotation in the closing sense, [edit: and vice versa for opening] would help prevent valves being left fractionally open or closed causing unwanted water being introduced into into tanks, or conversely, prevent air being blown into them. It is usual, at least with domestic plumbing, for taps (faucets) to have a delay in causing water to flow when a tap is opened, and likewise to cease the flow before the tap is fully closed. To my mind this is how our valves should be operating, in order that a positive closure or opening of the valve occurs. Last edited by Fidd; 10-06-23 at 10:45 AM.