１取消底阀。底阀阻力系数较大，一般可降低扬程１５ｍ左右。取消底阀以后水泵的效率会显著提高。若在出水管口装上一拍门，再用黄油封住填料盒，这样，停泵后再次启动时就不必充水。２取消闸阀和逆止阀。闸阀和逆止阀的阻力系数比较大，闸阀的作用是为了调节水量，但 1  cancel the bottom valve. At the end of the valve resistance coefficient is larger, generally can reduce lifts about 1  5m. The efficiency of the pump will be significantly improved after the bottom valve is removed. If the mouth in the outlet pipe fitted a pat door, and then sealed the stuffing box with butter, so stop the pump after starting again do not have to fill. 2  cancel gate valve and check valve. Gate valve and check valve resistance coefficient is relatively large, the role of gate valve is to regulate the water, but