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DIY boomless sprayer
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<blockquote data-quote="greybeard" data-source="post: 1261043" data-attributes="member: 18945"><p>Except at very low RPM, you won't notice any pressure deviation between the 6 and 8 roller pumps. You probably won't notice any pulsation differences either but your regulator and nozzles will--tho again, not perceptible to us humans. </p><p>The difference between the 2 variants appears to be that less pto rpm is needed with an 8 roller to achieve approximately the same pressure and gpm compared to a 6 roller. Both are rated max pressure of 300psi.</p><p>OR, the 8 roller is restricted to no more than 1000rpm to avoid exceeding the 300psi rating.?</p><p></p><p><a href="http://www.hypropumps.com/resources/images/740.pdf" target="_blank">http://www.hypropumps.com/resources/images/740.pdf</a></p><p>to achieve max rated pressure of 300psi and related gpm in a Series 6500 6 roller:</p><p>540rpm.......1000rpm........1200rpm</p><p>4.3gpm........12.7gpm........15.7gpm</p><p></p><p>Series 7560 8-Roller @300psi:</p><p>540rpm...........800rpm.........1000rpm</p><p>7.1gpm...........18.9gpm.........18.0gpm</p></blockquote><p></p>
[QUOTE="greybeard, post: 1261043, member: 18945"] Except at very low RPM, you won't notice any pressure deviation between the 6 and 8 roller pumps. You probably won't notice any pulsation differences either but your regulator and nozzles will--tho again, not perceptible to us humans. The difference between the 2 variants appears to be that less pto rpm is needed with an 8 roller to achieve approximately the same pressure and gpm compared to a 6 roller. Both are rated max pressure of 300psi. OR, the 8 roller is restricted to no more than 1000rpm to avoid exceeding the 300psi rating.? [url=http://www.hypropumps.com/resources/images/740.pdf]http://www.hypropumps.com/resources/images/740.pdf[/url] to achieve max rated pressure of 300psi and related gpm in a Series 6500 6 roller: 540rpm.......1000rpm........1200rpm 4.3gpm........12.7gpm........15.7gpm Series 7560 8-Roller @300psi: 540rpm...........800rpm.........1000rpm 7.1gpm...........18.9gpm.........18.0gpm [/QUOTE]
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