CFM v.s. LIFT
Printed From: Carpet Cleaning Forum
Category: Carpet Cleaners Discussion
Forum Name: Carpet Cleaners Hangout
Forum Description: General discussion on anything related to carpet cleaning
URL: https://www.kleenkuip.com/forum/forum_posts.asp?TID=877
Printed Date: 23/February/2025 at 9:11pm
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Topic: CFM v.s. LIFT
Posted By: rmarkham
Subject: CFM v.s. LIFT
Date Posted: 17/December/2004 at 2:30pm
| Which one will dry a carpet faster? And WHY? |
Replies:
Posted By: Superglide Ken
Date Posted: 17/December/2004 at 3:15pm
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This question has already been answered on this board in detail by me a couple of months back, but to give you the abbreviated version it is all a matter of cause and effect. Lift is what causes air to move, while air movement(cfm) is the effect of providing that lift. ------------- Inventor of the Teflon Wand Glide and the Turboteck Rotary Air Duct Cleaners for TMs. |
Posted By: carpetologist
Date Posted: 17/December/2004 at 4:10pm
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rmarkham, http://www.kleenkuip.com/forum/forum_posts.asp?TID=614&KW=cfm - Seems to me back in October you started a thread on CFM & Water Lift that had much to offer and has many comments. Personally I find that most carpet cleaners are not as scientific as others and only care how much the hose will actually suck into their palm. But the fact that most manufacturers offer lift over CFM may answer your question. Actually drying time has so many variables such as length of hose, size of hose, single pass, double pass, temperature in the room, air movement and circulation, humidity, pre-spray product being used, operator error and on and on. And of course Ken will explain why the Glide helps. I still feel we need an aerodynamic engineering company to develop a wand that is far superior to what we now have available and I know it can be done. If you have ever used a http://www.kleenkuip.com/restoration/water_claw.htm - Water Claw you will get my message real quick. The problem I have mentioned before is that most of our industry is cheap. It takes money to research and develop. And if the industry you are attempting to sell into will not support you then why bother. Steamer will be the first to agree. Money is everything. ------------- Kleen Kuip Supply Mart Inc. http://www.kleenkuip.com - New & Used Professional Carpet Cleaning Machines, Restoration Equipment, Training, Service and Supplies |
Posted By: rmarkham
Date Posted: 17/December/2004 at 4:37pm
| Thanks I thought I asked on another board. By the way,Ken where have you been I have not seen you around ccs much in the last couple of days. |
Posted By: Nordic 1
Date Posted: 17/December/2004 at 8:44pm
|
HE GOT BANNED!
Nordic 1 |
Posted By: Dixiedrifter
Date Posted: 17/December/2004 at 10:53pm
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Ok I'm gonna take a shot at this, and keep in mind this is coming from someone who has never used a professional carpet cleaner in their life. A vacuum works by using the force of the air moving into the wand to remove the bulk of the water, not the actual vacuum. The further the water is from the source of the vacuum, the less force that is exterted on the water by the air moving into the vacuum, resulting in less water being removed. This is where a good aereodynamic glide and wand comes in, to maximize the usefullness of the airflow entering the vacuum hose. To maintain the maximum amount of air entering the wand, it is neccessary to maintain the highest level of vacuum possible. This is where things get complicated. Air is screwy because is not in a static form such as electricity or water. Simply put, air can be stretched where water and electricity can not. The higher the level of vacuum, the less CFM at 1 atnosphere your blower can move per revolution. This really comes into play when you have a long length of hose when you have a bunch of "stretched" air in it. So for a good vacuum you need a blower capable of maintain a high degree of lift, such as a (positive displacement, the air is removed from the blower on each revolution whereas on a centrifugal blower you have the force of the atnosphere wanting to hold the air in the impeller blades, hence the multiple stages needed) and lots of CFM moving ability to maintain the lift under load. |