| 摘要 |
<p>A multi-stage pump system for use in desalination systems including a first stage (S1) providing low pressure for priming the system a second stage (S2) that is in fluid communication with the first stage and is primed by the low pressure from the first stage. The second stage (S2B) includes at least one reciprocating piston (122), in an enclosing cylinder (121, 121A) and is attached to the two second flexible inflatable bladders (123). The piston (122) will move up and down within the cylinder (121,121A) relative to the movement of the two second stage flexible bladders (123) due to priming by the first stage affecting their buoyancy. The driving fluid then passes into a passage (130) and is expelled to an outlet and Stage three (S3) at higher pressure when the first reciprocating member (122) proceeds through a complete stroke.</p> |
