Vac. question
- Thread starter phenning
- Start date
That is like saying V-6 or V-8, which gives more horsepower if all other variables are equal?
Yes bigger is better in this example....but, like all rules, there is an exception.
A 2 stage 5.7" vac motor might have 100cfm and 105" of water lift and pull 9amps on start up.
A 3 stage 5.7" vac motor might have the same 100cfm, but be rated at 130" of water lift and 11amps on start up.
Since both are plumbed in "air-parallel" in your example, you would have Double the cfm (200) and the Same waterlift as a SINGLE vac motor. 200cfm and 130" lift is nothing to sneeze at, and 200cfm and 105" is still very effective on shorter hose runs, especially if the hose is larger, like 2" truckmount hose.
Besides the obvious "size" issue (a 3 stage is taller) you have Amperage issues to contend with, there might be a reason a particular manufacturer used a small and lower amp draw vac in a particular set up.
Yes bigger is better in this example....but, like all rules, there is an exception.
A 2 stage 5.7" vac motor might have 100cfm and 105" of water lift and pull 9amps on start up.
A 3 stage 5.7" vac motor might have the same 100cfm, but be rated at 130" of water lift and 11amps on start up.
Since both are plumbed in "air-parallel" in your example, you would have Double the cfm (200) and the Same waterlift as a SINGLE vac motor. 200cfm and 130" lift is nothing to sneeze at, and 200cfm and 105" is still very effective on shorter hose runs, especially if the hose is larger, like 2" truckmount hose.
Besides the obvious "size" issue (a 3 stage is taller) you have Amperage issues to contend with, there might be a reason a particular manufacturer used a small and lower amp draw vac in a particular set up.
Mikey P
Administrator
What do you think Ed?
Larry Cobb
Member
phenning;
That is a poor design with two 2-stage vacs in parallel.
Who's machine is that ??
Two 3-stage vacs are better (series or parallel), since they have more lift & air watts.
Larry
That is a poor design with two 2-stage vacs in parallel.
Who's machine is that ??
Two 3-stage vacs are better (series or parallel), since they have more lift & air watts.
Larry
Larry, why give him confusing and erroneous information.
If someone wants to use two 2 stage vacs, I don't care, it's their design, if it's a single cord machine, that may be all the amperage they have avail. on a single 20 amp circuit.
And just for the record, a 105" waterlift and 200 cfm configuration is very effective on 25' (or even 50' of 2" hose) with 2" plumbing, the low lift isn't neary as important on a short hose run as the larger hose is very efficient, and there is very little "loss" involved.
If someone wants to use two 2 stage vacs, I don't care, it's their design, if it's a single cord machine, that may be all the amperage they have avail. on a single 20 amp circuit.
And just for the record, a 105" waterlift and 200 cfm configuration is very effective on 25' (or even 50' of 2" hose) with 2" plumbing, the low lift isn't neary as important on a short hose run as the larger hose is very efficient, and there is very little "loss" involved.
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