1. Swing check valve is generally installed in the horizontal pipe: for the caliber DN~80mm check valve, can also be installed in the vertical or upward inclined pipe.
2. Straight lift check valve should be installed in the horizontal pipe; vertical lift check valve must be installed in the vertical pipe, the medium is the bottom-up flow.
3. Due to the check valve is easy to damage, therefore, should be close to the pump outlet installation check valve, the upper part of the check valve is provided with a cut-off valve (generally with a ball valve or gate valve), convenient maintenance.
4. In order to facilitate the removal of the check valve before the pressure relief valve, the check valve itself does not bring the net valve should be installed between the check valve and the cut-off valve pressure relief valve.
