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Poppet type pre fill valves pre fill valves operate similarly to pilot operated check valves but they are usually much larger. Some pre fill valves can handle flows in excess of 6000 gpm at pressure drops of less than 4 to 8 psi. This info tec will attempt to answer some of those questions. Autocad electrical training courses and training material including on site.
With the 7800s now in extensive use questions have been asked by customers that are not clearly answered or not covered at all in honeywells literature.