[Dave_Lee]

As a matter of routine maitenance, wand and all tool jets should of course be periodically checked. However didnt get around to checking my main wand jets until recently. They had been in for just over two years. 2 x 11002. I always thought they were 11003 - anyway, compared their output with brand new 11003s. Though they were the smaller size their output was approx 20% more than the larger 11003. Obviously due to wear. The jets were brass. I have noticed quite a difference regarding water consumption since changing them.
(Obviously 20% as much difference.)
Dave.

[*paul_moss]

On jets are they universal fit or do you have to get the jets from the manufacturer of your wand/tool ?
Also advice on jet size please for a tripple jet wand using a 135 psi pump.

Paul

[Mike Halliday]

most wand jets are universal, as long as they are T jets,  some wands now are coming fitted with threaded jets. which may not be inter-changeable.

a common rule of thumbs is all the jets should add up to '6' so a tripplewand jets will have 11002 jets  the first 3 numbers being the angle of dispertion the last  numbers the amount of solution at a pre-determined  Psi ( don't know what it is though : )

Mike

[David Ware]

Mike
I believe the Magic Wand Co give the amount of solution coming through the jet size is calculated at 40psi
David Ware

[Dennis]

Here's a handy jet performance table with flow rate against pressure at different jet sizes (needs Acrobat reader)

As david says at 40psi an 02 gives .2 galls (US?) per min, 03 gives .3 galls a min

http://www.pumptec.com/carpet/pdf/NozzlePerformTable.pdf

[*paul_moss]

I have  02 jets on my tripple wand. If i change to 10 does that give me lots more pressure and less spray in terms of solution through put

paul

[Dynafoam]

Paul,

I am assuming you meant to type "01" rather than "10".

The result will vary dependant on the capabilities of your pump. If your pump can sustain pressure with the 02 jets, then the throughput will halve when changed to 01.

If however you are using, for example, a Flowjet 100psi pump, with the existing jets the line pressure once the trigger is opened is likely to drop to something a little over 80psi, whereas with the smaller jets the line pressure-drop will be less so the total solution output reduction will be less than half

[Ian Gourlay]

Dave says at the top that we should check our jets.

Exactly what am I checking.

Water Comes Out.

How do you know if you have a dodgy jet.

Is there a reference manual where I can obtain this info

[eclipse]

i have a twin jet wand and on a weekly basis i unscrew the jets and clean the removable filters which do get quite a bit of sludge on them i can only put this down to using ultimate master any other ideas guys?

[*paul_moss]

John what size jets do you use on your wands and hand tools

paul

[Ken Wainwright]

Below is a copy of an article I researched for the NCCA Newslink some time ago. Hope it helps.


There is an area of maintenance to our equipment which often gets neglected. We are usually only aware of it when a customer calls us back because we have left some “stains” in the carpet. The problem is streaking caused by jet wear.

There are 3 basic types of material used in the manufacture of the fan jets used in our HWE tools:  plastic, brass and stainless steel. The plastic and brass wear moderately to fast, primarily dependant upon the nature of the chemicals and the water pressure. It isn’t uncommon for brass jets to be worn sufficiently within just a few months to cause streaking with a loss of the fan spray overlap on multi-jet tools. The stainless steel option, especially with portable machines, is usually a fit and forget item as wear rate is very slow.

How do jets  wear?  The erosion and corrosion caused by the cleaning solution makes the jet’s hole become larger. This has 2 consequences. Firstly, more water is passed through the jet which makes the carpet wetter,  and secondly the fan of solution becomes narrower, so you are unable to rinse to the edge of the tool and also loose the overlap on multi-jet tools.

There is often confusion over the meaning of the numbers on the jet. Using as an example a specification of 8004. The first 2 numbers,  in this case 80, signify the size of the solution’s fan  which is 80°  at 40psi. The second 2, 04, signify the amount of water which pass through,  also at 40psi. In this case it’s 0.4 gallons per minute.  For a 11003 jet it would be 110° at 0.3gpm. If the water pressure is increased, so will the fan angle and the flow rate. This part numbering system was developed by Spraying Systems Company of Wheaton Illinois, USA. This means they are US gallons, not Imperial.  An easy conversion is 1.2 US gpm = 1Imp.gpm. Fortunately for us, most other fan jet manufacturers have utilised the same system for coding.
 
Many technicians, and indeed manufacturers, will sometimes install a higher specification water pump to their machines. What they often fail to do is adjust the jet sizes accordingly. At the recent NEC cleaning show, it was refreshing to have it pointed out to me by Robert Capocci of Cleancare International, an NCCA Associate Company, that their machine with a high spec 300psi pump had accordingly had jets with a 33% lower flow rate installed to their floor tools. It’s attention to detail like this that can make a good machine great.

Happy cleaning
Ken Wainwright
M 677

[Ian Gourlay]

Also one of my hand tools has an enclosed jet how do you get to it.

Fraid  I work on the principal of if its working dont fix it. But obviously I am wrong

[eclipse]

i bought one of the handtools with a stainless steel splash guard which sounds similar to the one you are describing to get to (nightmare)
 i dug around in my shed and found one of those old like sparkplug box spanners (the ones like a tube with a different size on each end with a hole for a screwdriver to go through the middle) i found this to be suitable for removing the jets to clean them

[Dynafoam]

John what size jets do you use on your wands and hand tools

paul

Hi Paul,

I use a variety of jets in my wands an hand tools and frequently change them to suit particular jobs. For example, my 'general purpose' wand normally has 2 x 11003 but I may change these for 2 x 110015 and increase pump pressure to 350psi when cleaning a dirty BW.

I have two four-jet wands, one fitted with 4 x 85015 and one with 4 x 65015 Whilst my single-jet wand permanently has a 11008. With eight of the hand tools I only change jets when worn, but the CFR tool I have so far used three of the four sizes, most commonly No.1.

[*paul_moss]

John why do you fit 85% to your 4 jet wand ? and does this improve performance against 110% angle jets?
Paul

[Dynafoam]

Paul,

As the number of jets in a wand increase, so the jets get closer to the carpet. The spray angle of the jet is therefore reduced so that the coverage of the overall spray pattern gives an even distribution. with 110 degree spread,the spay from adjacent jets would collide, resulting in a streaky carpet.

[dave washbrook]

hi all
 john you say that the jets should add up to 6 in my twin jet wand i had with my tm i have 2x02 should i change them for 2x03 also i have been using this sice may and they are the brass type should i be thinking of changing them now, please excuse me but i'm finding this dificult to understand.

your great knowledge would be appricated

thanks

dave

[Ian Gourlay]

Lee Thanks for idea. To be honest I am scared that if I take the jet out I might not be able to aim correctly and get it back in as I cant see what I am doing.

The manufacturer must have designed away.

Been thinking of phoning a Company such as Woodbridge see if they service these hand tools.

[Dynafoam]

Hi Dave,

Though a total jet count of 6 in many cases will give an optimum overall performance, this is not always the case.

Your current set-up could give you a good balance between jet-blast and flushing action dependant on the operating pressure you use. As solution pressure increases , so does the throughput and - to a lesser extent - the delivery angle of the jet-stream. At 300psi your wand, with its' current jetting would put down roughly the same amount of solution as a similar wand operating at a lower pressure with 03 jets.

The two prime considerations when setting up a wand are:

Jet blast.

This is the 'pressure-washing' action - as the jet blast increases so does the wands' ability to physically displace soil from the carpet and also the penetration depth of the jet-stream. Excessive blast can result in excessive penetration and over-wetting of the carpet backing. Insufficient blast obviously reduces the waters' mechanical action.

Flushing.

The cleaning solution applied by the wand is the transport medium that facilitates the removal of soil from the carpet by the vacuum system. Insufficient delivery will result in reduced soil removal, whilst an excess beyond the capabilities of the vacuum recovery will result in over-wetting.

Other than setting up a balance to satisfy both the above requirements, other factors such as wand technique (specifically stroke-speed) must also enter the equation, as does the physical structure of the carpet.

The above is a slight over-simplification in that I have not mentioned other minor considerations. In practise, what normally happens is that with even the most carefully designed set-ups, a manufacturer will supply a compromise arrangement which will work 'well enough' over a range of variables. Fine-tuning beyond that is  something that needs to be constantly re-adjusted to match the requirements of individual jobs - not the best way to improve productivity for someone whose livelihood is dependant on clocking up the yardage.

[dave washbrook]

thanks john
 i think i understand what you are saying i think i will stick with what i have at the moment which is 2x02 because i normally operate at about 300psi and it seems to be working ok

thanks for your expert advice

dave