This may be a stupid question, but:
With the H-R valve set for inflation and using the H-R pump/adaptor to inflate there is a loss of air on disconnecting the pump/adaptor by hand.
Is the valve designed so that the pump/adaptor will pop free from the valve when maximum tube pressure is reached? Thus avoiding any loss of air when removing the pump/adaptor from the valve by hand.
On my Quicksilver I think they are HR valves. You basically leave the valve on deflate mode and whack a load of air in with an electric inflator - then close the valve very quickly and pump more in using a foot/hand pump. The air pressure overcomes the spring and the air goes in - too much pressure and they vent off.
