Are there issues with operating a pump barely above its minimum flow? (see attached pump curve)
Are there issues with operating a pump barely above its minimum flow? (see attached pump curve)
(OP)
Are there problems with operating near the "minimum required flow for safe pump operation"? I assume that below this level you start getting into the dead-head regime. Is there also lesser risk with operating near the minimum, but above?
We are debating whether or not to add a small size pump to our multi-pump setup. The energy savings do not justify its cost, so I'm wondering if there are other lifetime costs to consider.
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We are debating whether or not to add a small size pump to our multi-pump setup. The energy savings do not justify its cost, so I'm wondering if there are other lifetime costs to consider.
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RE: Are there issues with operating a pump barely above its minimum flow? (see attached pump curve)
RE: Are there issues with operating a pump barely above its minimum flow? (see attached pump curve)
Independent events are seldomly independent.
RE: Are there issues with operating a pump barely above its minimum flow? (see attached pump curve)
Not my field of expertise but from what I understand the minimum flow line is the minimum allowable flow, therefore operating above minimum line should be OK.
Why not check with the manufacturer, surely this should be the first phone call to sort your concern.
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Are there issues with operating a pump barely above its minimum flow? (see attached pump curve)
Independent events are seldomly independent.
RE: Are there issues with operating a pump barely above its minimum flow? (see attached pump curve)
Other than walking past several of them, I haven't had much to do with rotojets, so I suggest you keep hunting for someone with some practical experience.
RE: Are there issues with operating a pump barely above its minimum flow? (see attached pump curve)
Independent events are seldomly independent.
RE: Are there issues with operating a pump barely above its minimum flow? (see attached pump curve)
Independent events are seldomly independent.
RE: Are there issues with operating a pump barely above its minimum flow? (see attached pump curve)
I've never dealt with multiple RotoJets in parallel, but given their manner of operation, I would want to verify that all are sharing the total flow in their proper proportion. My thinking is that just one pump operating at the minimum system flow condition may not be as severe a problem as initially anticipated. The accuracy with which the minimum and maximum flows are known seems to be the key to resolving this question.
Valuable advice from a professor many years ago: First, design for graceful failure. Everything we build will eventually fail, so we must strive to avoid injuries or secondary damage when that failure occurs. Only then can practicality and economics be properly considered.