| 摘要 |
<p>A pump assembly having a pump with an inlet duct (10) and an outlet duct, the inlet duct including an air separation chamber (11), which is communicable with a vent of an ejector head (21) in which is provided a venturi (25a) to suck air from the air separation chamber and eject it to atmosphere, the ejector head also having a valve member (38) for controlling communication of the vent to atmosphere. A valve member (37) controls communication between the air separation chamber (11) and the ejector head (21), and the valve members (37,38) are carried on a common shaft (39) of a float valve assembly which also includes a float (36) carried by said shaft in the air separation chamber, the valve assembly operating so that air in the air separation chamber is sucked into said ejector head and ejected to atmosphere to prime or re-prime the pump, whilst liquid in the air separation chamber is prevented from entering the ejector head. <IMAGE></p> |
