I built and used this inexpensive vacuum pump setup for vacuum bagging.
It consists of:
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Mini 12V DC vacuum pump, 10 L/min, -70 kPa ($10)
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Vacuum controller with hysteresis ($10)
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Relay ($2)
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Glass jar (free)
Props: -
It can actually reach -70 kPa and run for at least 5 hours without any problems.
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Total cost: $22!
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Supports hysteresis
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Very silent
