MICROFICHE REFERENCE LIBFUUW - Cd3wd.com

119pump--usually up to a limit of about 120 ft. Units are available in sizescapable of handling up to 10,000 gpm (Eier and Schoenleber, 1942). Inthe case of a well supply, this also allows all moving parts to remainabove ground for easy maintenance. Figure 4.8 illustrates the commonarrangement of ejectors for shallow and deep wells.Because the centrifugal-jetarrangement of Figure 4.7a was notavailable commercially for irrigation and agricultural drainage applications,work was undertaken at the International Rice Research Institute(IRRI) to develop such a design (Samuel, 1975). This sequence utilizesthe entire discharge of the centrifugal pump to lift an additionalquantity of water through the ejector. The IRRI design makes this systemapplicable for low lift agricultural pumping situations, e.g. betweencanals and paddies.