No testing equipment available to test for vacuum strength. Vacuum port pulls excellent vacuum if you put your hand over it. I know thats not an accurate test but seems to run well.Ran pump for 15 minutes. Please take a look at the photos and let me know if you have any questions. Thanks for shopping and I look forward to your order! Did not get hot and seem to run consistently. Thanks for shopping and I look forward to your order! The item "Precision Vacuum Pump Model DD20 0.7 CFM 5 Micron" is in sale since Tuesday, September 29, 2020. This item is in the category "Business & Industrial\Hydraulics, Pneumatics, Pumps & Plumbing\Pumps & Pump Accessories\Vacuum Pumps\Other Vacuum Pumps". The seller is "liqidatorman" and is located in Santa Ana, California.
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