venturi vacuum generator technical drawing

To further confuse the issue, various manufacturers call them different names (i.e. Many end users, through misinformation, do not fully understand the benefits of this product, or - more importantly - the limitations. When the 18th century Italian physicist Giovanni Venturi discovered that when air is forced through a conical nozzle its velocity increases and the pressure decreases, neither he nor anyone could conceive that it would ultimately spawn one of the most used and most highly controversial products in industry today - the Venturi vacuum generator. In this article, we look at proper application and control of Venturi vacuum generators, including a brief introduction to the technology and a case study with energy calculations. Extensive product development with this equipment, particularly the crucial system accessories, often makes the selection of the most energy-efficient items difficult for many localized operations.

However, they were not regarded as energy efficient, probably due to their use of compressed air. Through the last decade, they were considered convenient and flexible solutions with quick response time. You can test the performance of this setup by connecting a vacuum gauge to the vertical fitting.Air-driven Venturi vacuum generators have long been a viable option for fast-response, localized, vacuum-powered systems. when you apply sufficient air pressure, it will generate a vacuum in the vertical fitting. Hook the horizontal QD fitting to your shop air. Once you reach this point you can test the rig. Now your ready to install the quick disconnect fittings.

It's best to use lube & back out regularly to clear out chips. Take your 1/4NTP tap & carefully start cutting into the hole. Put the block into a vice & tighten securely. do not drill into the other side of that wall.

Stop once you clear the wall of the 0.75' hole. This is the center point for your next hole. Now, on the top surface, start at the end of the 0.75' hole & measure back 1.78'. Drill all the way through to the hole made by the 0.75' end mill. Go back to the end where you drilled the 1st hole & drill a 0.2' hole in the center of the 1st. Be sure to use plenty of lube & back out regularly to clear chips. Drill the other end to a depth of 2' using the 0.75' end mill. Drill one hole on the end to a depth of 0.6'. In order to use the standard 0.25'NPT shop air fittings, use a 7/16' drill bit.

Keep in mind, a longer exhaust section would give a stronger vacuum. I only went 3' because the longest 0.75' end mill I had only cut to 2' depth. I took a piece of aluminum measuring 1.25x1.25x3'. For more info on how that works, see the wiki article on the Venturi Effect. I wanted to use my air compressor as a vacuum pump.

Venturi vacuum generator technical drawing