[Jim_77]

Mike I think the reason for sticking with 1.5" is down to vacuum pressure.

The vac motors create their vacuum in the air space between the motors and the lips of the wand.  Therefore if you increase the diameter of the vac hose you're increasing the size of the vacuum chamber.... the vacuum performance becomes less efficient because the motors have to create the vacuum in a bigger space.

That's why a vac-optimised machine such as a Ninja runs on 1.5" but an airflow-optimised machine like the Scorpion runs on 2" because the larger diameter hose gives less resistance to air flow.

[clinton]

Mike

Do you have the 2" hose on yours

Think what gary is doing it using the advanced texatherm cleaner then buffing then extracting

[Jim_77]

Some quick maths... hope I've got it right

50ft of 1.5" hose has an internal volume of approximately 17 litres

50ft of 2" hose has an internal volume of approximately 31 litres

Say your machine's recovery tank has a volume of 50 litres.

Running with 1.5" hose gives you a total vacuum chamber capacity of 67 litres, whereas 2" hose results in a capacity of 81 litres.

In this example, stepping up to 2" hose increases the volume of your vacuum chamber by roughly 21%

[Mike Osbourne]

That's interesting Jim. So maybe there would be more to it than just making a bigger hole!

Clinton.  I still use 1.5 up to 50ft. I have a 50 ft length of 2" which I'm going to split and give me more options.

I think it's cheapo hose that came with the machine, it's rock hard this time of year and quite often I'm reluctant to get it out. Ew er Mrs.

[clinton]

Jim

Thats the science you know your stuff mate

Mike

They tend to be less flexible and spec in this v cold weather hard to coil up :

Dont be geting it out on here

[clinton]

Jim

As you run a good truck mount set up with your franchise what portie are you going to run as to when you caint access the areas with the t mount

Just i saw your selling your alltec

[Jim_77]

Clinton....

http://www.online-calculators.co.uk/volumetric/cylindervolume.php



I don't run a TM mate I still use my trusty old Ninjas although am tentatively planning to first upgrade the van and then get a hydramaster unit in it, some time this year.

The Alltec setup has come from somewhere else, along with a database of customers.  One I'm selling, the other I'm keeping

[Mike Osbourne]

The 318 did seem a cracking deal but not sure if prices have change in recent months. Team that up with the fact vans are going for a song this year could be bargain time for those who are established.

[clinton]

Jim

Sory thought you being a franchise you had a t m :

Same here am thinking of an upgrade on both counts

Do you have a booster and in line with your ninjas

I use alltechs just sold an old elite that was 16 ys old

[clinton]

Looked at the hyundi van and its geting on to 14 grand and wont give much discount,ford on the other had are discounting as we found out after xmas with us getin a new car

Keep toying with the idea myself with something biger machine wise.

[Jim_77]

I don't use either.  On big commercials I use a Y-junction to parallel two machines up together, which  doubles the airflow and enables a bit longer hose run (still only go up to 75ft though)

I've tweaked one of my machines slightly so it heats a lot hotter than standard - the tank actually starts bubbling and steam forces its way out from under the lid!  This may knacker it in the long run, but it's been sound so far, not every job needs this!  I bought the machine very cheaply so considered it worth the risk!

[clinton]

Saw that picie you put up on here last yr with the two ninjas running together

Long as it benefits you with the purchase of that machine and data base least you can get some cash back.

[Jim_77]

Didn't think I'd ever took a pic of it tbh!    Might be my alzheimers kicking in

Yep, I reckon the purchase will have paid for itself by next Christmas and then we'll be cooking on gas

Just a bit of a bummer having to use my overdraft at the moment

[Mike Osbourne]

There used to be a guy on here called Gary who was always getting stick for bigging up TM portables.

 He put some pics up, but it was in one of those funny little vans  . He had two ninjas and connected them up.

[clinton]

Mike

Yes you might be right i rememeber the picies sory jim :

Mike

One of the rascal vans

[Mike Osbourne]

On paper they make sense, in reality.

[clinton]

There doinfg ford transit vans for 8 and half grand and thats all inc of vat etc,thats about 4 grand off

[Mike Osbourne]

Not good to me Clinton, apparently I already own a Trannie. :

[clinton]

Mike

there not  a bad vehicle the transit

[Dave_Lee]

Just to throw in a thought cruncher. Vacuum motors are actually blowers. That is their function is, to blow. In order to blow they have to have an air intake. It is this air intake that is taken advantage of and used as a sucker. When the sucker end is attached to a pipe, a vacuum effect is created in the pipe. If the pipe is conected to a vessel or tank with another hole in it, the air intake at the hole will be the same as at the blowers air intake. This is because the blower will empty the intermediate tank at a certain rate and the tank will be refilled with air at the same rate, even if the hole is a larger diameter.
Now if the blowers air intake is 1.5" diameter and then the hose out of the recovery tank is 2" you do not get more airflow unless you increase the number of blowers and set them in parrallel. If, regardless of the number of blowers, they are set in series, you do not get more airflow, you get slower less restricted airflow. When a 2" hose is then attached to a 1.5" wand the same airflow is maintained but because of the reduced diameter, greater lift is produced due the increase in air velocity that a narrower tube produces.
You cannot increase airflow just by using 2" hose instead of 1.5" The bigger the blower the bigger the diameter of the air intake, in the case of Truck Mounts usually starting on the smaller units, the intake is normally 2.5" up to 3.5" for the bigger ones. That is why 2" vacuum hose and wands are ideal. The blowers 2.5" air intake demand is reduced to 2" vac hose, hence creating more velocity and lift.
There! Clear as --d?
Dave.