What should we watch out for when the cooling tower and pump are at the lowest point of the system（2））

PS2:The cooling system is generally open cycle, the cooling tower and cooling water pump are at the lowest point of the system. When the operation stops, the water that exceeds the cooling tower basin will overflow.When turning again, the remaining water in the water basin is not enough for system circulation.The check valve can stop the instantaneous reflow, and the slow return resistance is not very good，Because the pressure difference between the front and the back of the valve is too small.It is best to build a pool that can store the entire system's circulating water. The cooling tower is installed on the pool and the pump draws water from the pool.

The head of the pump: the height of the pump outlet to the highest point of the system plus the pressure drop across the equipment.