Beemaster's International Beekeeping Forum
BEEKEEPING LEARNING CENTER => EQUIPMENT USAGE, EXPERIMENTATION, HIVE PLANS, CONSTRUCTION TIPS AND TOOLS => Topic started by: nella on June 17, 2009, 05:25:19 pm
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What is the maximum number in inches on a vacuum gauge(or fraction of an inch) that a bee vac can be operated at without hurting the bees?
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7 inches. :-D Just kidding,I don't really understand your question.Wish I could help.I just adjust mine with vents until it just pulls them off gently.I adjust it because I will use anywhere from 10 to 50 foot of hose.
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Would that be inches of water or inches of mercury?
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Because pressure was once commonly measured by its ability to displace a column of liquid in a manometer, pressures are often expressed as a depth of a particular fluid (e.g. inches of water). The most common choices are mercury (Hg) and water; water is nontoxic and readily available, while mercury's density allows for a shorter column (and so a smaller manometer) to measure a given pressure.
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Just enough pressure that a bee can hang on for a few seconds before giving up and being sucked in. It helps to reduce the hose at the nozzle to produce a higher flow for the first few inches, then a larger bore hose the rest of the way to reduce injuries.