2007 Master Catalog - (Page 3) LIVE CHAT! Click Here How Vacuum Pumps Work Design Your Vacuum System to Breathe… Avoid the #1 System Design Flaw. To ensure an efficient vacuum system, emphasis should be placed on the vacuum flow path beginning with the object being handled or vessel being evacuated and ending at the vacuum source. Improper sizing of the system components is the most common vacuum system design flaw. Vacuum is a low pressure power source (max value of 14.7 PSI, [1 bar]) whose effectiveness is easily reduced by restrictions from tubing, valves, fittings, etc. An excellent analogy is trying to breathe through a cocktail straw. It’s almost impossible to survive because the small flow path will not allow enough air to reach your lungs. A drinking straw with its larger flow path let’s you breathe much easier by allowing more flow. In applications where a restriction cannot be eliminated i.e. when deflating a ball prior to shipping – use a vacuum source that can generate a high vacuum level. Vaccon H Series pumps provide the fastest evacuation possible. To determine if your system is restricting vacuum flow, place a vacuum gauge at the pump. If the gauge reads vacuum when nothing is connected to the vacuum cup or a vessel is not attached, the system is restricting flow. If the system is not working, i.e. not picking up a porous object or not evacuating a vessel fast enough, a larger vacuum pump will not fix the system until the flow path size is increased. Proper Design A3 A3 A2 TO VACUUM SOURCE AIR FLOW Improper Design AIR FLOW A1 A2 POROUS OBJECT TO VACUUM SOURCE POROUS OBJECT A3 A3 MATCHING AREAS A 1 = ( A2 + A2 ) = ( A3 + A3 + A3 + A3 ) AIR FLOW AIR FLOW Plumbing a vacuum system can be thought of like a municipal water distribution system where the lines closest to the pump are the largest and get smaller as they get to your house (vacuum cup/ vessel). The area of each branch of tubing should match that of the next branch and the main trunk line should be sized to handle the maximum flow. Remember, that just a small change in diameter causes a large change in area - a 2x change in diameter increases the area 4x. Phone: 1-800-848-8788 or 508-359-7200 E-Mail: engineering@vaccon.com 3 https://www.websitealive5.com/2126/rLogin.asp?groupid=2126&websiteid=0&departmentid=0&sessionid_=36&loginname=&loginemail=&loginquestion=&infocapture_ids=&infocapture_values=&dl http://www.vaccon.com
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