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一是取消底阀底阀阻力系数较大，一般降低扬程１．５０米左右。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。二是取消闸阀和逆止阀间间和逆止阀的阻力系数比较大，闸阀的作用是为了调节水量，但农用泵
First, cancel the end of the valve bottom valve resistance coefficient is larger, generally reduce the lift of about 1.50 meters. 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. The second is to cancel the valve and check valve between the check valve and the resistance coefficient is relatively large, the role of the gate valve is to regulate the amount of water, but agricultural pump