| 摘要 |
PURPOSE:To improve durability and facilitate maintenance by previously drenching the suction valves of a diaphragm pump apparatus which supplies liquid and gas at a same time under pressure, thus, reducing the trouble in the suction operation due to drying. CONSTITUTION:A suction-side flow passage 7 is formed onto the center base 5 of a diaphragm pump body 1 for an automatic analyzer, etc., and a water flow passage P for the supply of water by an outside pump is opened onto the suction-side flow passage 7 side where the suction-side flow passage 7 and a longitudinal flow passage 11 which communicates to the suction valves 12 and 13 installed onto the valve chambers 21 and 21' of diaphragms 2 and 2 are connected. Before the pump body 1 of the diaphragm pump apparatus is operated, water is fed from the water passage P by operating the outside pump, and the suction valves 12 and 13 are previously drenched. |
