Some Time Less vaccum is better option.
- Thread starter Calgary Hog
- Start date
- Sep 5, 2007
- 38,006
- 19,552
- 113
- Real Name
- Robert Allen,Jr.
- Business Location
- United States
- Sep 5, 2007
- 38,006
- 19,552
- 113
- Real Name
- Robert Allen,Jr.
- Business Location
- United States
Jim Davisson
Well-Known Member
- Aug 23, 2016
- 4,381
- 5,297
- 113
- Real Name
- James Davisson
- Business Location
- United States
Operating lift is lost over distance even if full occlusion still shows higher lift (but still not what the gauge at the machine reads).
Vacuum is similar to a pressure system. Psi = lift
Flow = cfm. The longer the run the lower the flow. The psi or lift remains fairly constant. The longer the hose the more resistance to the flow. The orifice at the end of the hose will become larger in relation to the flow and than the psi drops. If the orifice is closed completely the psi remains relatively constant.
heres the video...
larry cobb measures inches of vacuum lost on a 500' hose run....
says it is about 1" per 50'.....
video.search.yahoo.com
larry cobb measures inches of vacuum lost on a 500' hose run....
says it is about 1" per 50'.....
larry cobb carpet video measuring vacuum - Yahoo Video Search Results
The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web.
video.search.yahoo.com
Jim Davisson
Well-Known Member
- Aug 23, 2016
- 4,381
- 5,297
- 113
- Real Name
- James Davisson
- Business Location
- United States
heres the video...
larry cobb measures inches of vacuum lost on a 500' hose run....
says it is about 1" per 50'.....
larry cobb carpet video measuring vacuum - Yahoo Video Search Results
The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web.
That's exactly what happens, vac connections that don't leak stave off the loss, but distance is distance.
heres the video...
larry cobb measures inches of vacuum lost on a 500' hose run....
says it is about 1" per 50'.....
larry cobb carpet video measuring vacuum - Yahoo Video Search Results
The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web.
Practically no loss . In a 200’ run, 4” of lift is lost. Now measure the cfm over a 200’ hose run.
CFM IS all across the board...
One guy can measure 300 cfm another guy can measure 200 cfm on the same machine...
whether portable or TM....
best to go with FIELD TESTING
This is a projection of running both a
45 blower and 27hp
47 blower and 33-35hp
over 8-10 years of hose runs 100-350'
You will lose about 50 CFM for every 50' hose run...same for portable and TM.
I go by the 1/2 CFM rule..
take your CFM cut it in half and that will give you the maximum length of hose to run wo a mojor dropoff.
200 cfm = 100' hose run
400 CFM = 200' hose run
One guy can measure 300 cfm another guy can measure 200 cfm on the same machine...
whether portable or TM....
best to go with FIELD TESTING
This is a projection of running both a
45 blower and 27hp
47 blower and 33-35hp
over 8-10 years of hose runs 100-350'
You will lose about 50 CFM for every 50' hose run...same for portable and TM.
I go by the 1/2 CFM rule..
take your CFM cut it in half and that will give you the maximum length of hose to run wo a mojor dropoff.
200 cfm = 100' hose run
400 CFM = 200' hose run
Last edited:
What poop looks like?
Normal poop is brown and has a soft to firm consistency. Normal poop is generally: ... Soft to firm in texture: Poop that is passed in one single piece or a few smaller pieces is typically considered to be a sign of a healthy bowel. The long, sausage-like shape of poop is due to the shape of the intestines.
Normal poop is brown and has a soft to firm consistency. Normal poop is generally: ... Soft to firm in texture: Poop that is passed in one single piece or a few smaller pieces is typically considered to be a sign of a healthy bowel. The long, sausage-like shape of poop is due to the shape of the intestines.
I agree it’s hard to measure cfm as most do not have the proper equipment. However using your formula which I don’t dispute it’s becomes obvious that in a hose run the big loser is cfm not water lift. That one reason in our Escape ETM we have a 2.5” inlet fitting so if they desire the operator can run a long hose run with a minimum lost of cfm. Using 1.5” hose on a porty diminish the length of hose that can be run effectively.
using a portable booster probably loses less cfm as it is set out 100' or so......
OxiFreshGuy
Well-Known Member
- Nov 12, 2016
- 2,997
- 2,190
- 113
- Real Name
- Boris Johnson
- Business Location
- United States
The dumb thing I had at a previous company was being required to run 500 ft of hose through a retirement center off a Sapphire 1200 with a 50ft 1.5inch whip and use a 1.5 inch wand.
Water would literally fall out of the wand back onto the carpet. Got fired because I started going through different doors for shorter hose runs lol
Water would literally fall out of the wand back onto the carpet. Got fired because I started going through different doors for shorter hose runs lol
"2.5” inlet fitting so if they desire the operator can run a long hose run with a minimum lost of cfm." Really????
The reason I used it was to lower the slot velocity incoming to the tank which is important for small waste tanks.
Yes if you run 50’ of 2.5” than your 150’ of 2” there is less restriction and so cfm levels are not compromised as much. Like sipping through a slupee straw compared to a bar straw.
Last edited:
Similar threads
