My direct drive has two speeds, one at around 700 RPM which I use for upholstery, one at the standard speed of 1550-1700 for regular cleaning. Lets say I have a longer hose run, maybe 250 feet or 2 inch, would increasing my truck speed to 1900 RPM help increase vacuum? Or is this a case only so much air can travel through a certain size hose and all I will be doing is wasting gas? I only ask because I have a large commercial job coming up, it’s a repeat and they were happy with prior cleaning, I was just trying to decrease dry times as best as I can for liability sake.
Yes of corse it will, Lot actually but if your machine isn't made to handle that you will ruin it fast. Talk to manf. before
I have thought about this very same thing but I was assured that it would be very bad, so running 4 ttd is a good solution. What machine you using?
butler system. While butler is a great company, they often give me stock answers because I guess they dont want us to modify our machines. But turning up the rpm is a two second step, I honestly though cant tell if more air is getting drawn in or not.
Most blowers can run up to 3600 rpm's. On my truckmount I had at my old job (it was a slide in unit) we ran about 2000 rpm's on a regular basis, and when we ran 2 wands or extra long hose runs we would run it at 2500-2600 rpm's. The blower on that machine was geared 1:1 with the engine so the blower was running at the same speed the engine was. On my current machine I have a smaller blower, but the engine and blower are running at 3500 rpm's which gives me good vacuum. On your machine you should be able to increase the rpm's, the only thing you need to know before doing so is the gear ratio between engine and blower. I am not sure what gear ratio buttler uses, but if it is running at 2:1 then when your engine is running at 1700 rpm's your blower is at 3400 rpm's which is maxed out. Again, I don't know what your gear ratio is, maybe buttler could tell you. One other thing to consider, most pressure pumps have a max rpm of either 1750 or 3500. Again you would need to know what your particular pump is made to handle. I am guessing (and this is only an educated guess) that butler is using a pump made for 1750 rpm's and it is probably geared 1:1, so that may be why they recommend running your engine at 1700 rpm's. I hope this helps some and dose not cause more confusion than answers, I wish I knew more on the gear ratios buttler uses so I could give you a better answer.
Dont go crazy and lower it went done. 600 ft is longest we went without increasing rpm, throw a few fans down and do a half extra dry pass
