| 摘要 |
PURPOSE:To permit automatic start and stop of a pump by turning ON/OFF a lead switch in the upper part in accordance with the ascent and descent of a float due to the water-stream pushing-up force and a lever which is moved following a diaphragm which performs displacement by a pressure. CONSTITUTION:When the speed of a water-stream becomes below a set value, a float 3 sinks along a float guide 4 by the selfweight, and is seated onto a flow hole part 1a, and a lead switch 2 operated by said float 3 is turned OFF and a pump 14 stops operation. When the water pressure reduces in this state, a diaphragm 6 performs displacement and pushes-up the float 3 through a lever 10, and the original state of a pump as shown in Fig. A is formed. Thus, the float 3 is operated by a lever 10 which moves following the diaphragm 6 which performs displacement by the pressure from the side and is opevated by the water- stream pushing-up force, and then the lead switch 2 in the upper part is opened and closed, and automatic start and stop of the pump is permitted. |
