Not quite accurate. When calculating flow through a check valve, you need to know the check valve's Cv value. There are other items required to calculate the flow depending upon the media. Here is a link for calculating flows through check valves. It comes from the Check-All Valve website...
Check out www.checkall.com. These valves are used as foot valves. They are spring loaded poppet style; therefore, the spring will provide for a "bubble tight" seal without the need of head pressure (back pressure) to close the valve and prime the pump.
