Right I've been out to van
I called Williamson pumps had a half hour convasation ,
He was almost adamant that there is nothing wrong with the pump and encouraged me to fuslt find more
He told me to turn pump on and see if I can get 5 litres of water in 60s which I did get that exactly
He told me your fualt finding ends there and so there is nothing wrong with the pump
The battery seems fine I turn engine on it goes to like 13.5 or something when running it shows 12.8 so I don't think it's that .
I disconnected the filer I thought that was going to be the problem catching air it wasn't ,
And still up to 100psi it stop starts
Down to 70 I get a workable flow but slow and annoying
He said I should look at the hose
Now at one point while the pressure was building I disconnected the main pipe to let the water flow and flow it does at 5p per min, and a lot of steam or sort of smoke came out of the hose reel and the main connector as if something in the hose has blocked it not allowing it to flow at high speed?and at max setting it just piles up pressure ?
But how where do I start its 6m microbore what end could it be?
If I'm on the right track ?
It can't be the switch as the water is going ?
First of all it sounds like you are getting flow and pressure confused.
Just because your controller has flow settings between 1 and 100 it isn't anything to do with pressure. It's flow rate that has been divided into 100 segments. If you had no hose connected to the pump 100 should be pumping water out at 5 LPM. If you set it at 50 theoretically you should get around 2.5 LPM.
So you have calibrated the controller to work at 80. The flow should be continious at that FLOW but it will pulsate if you increased the FLOW to 100.
The higher the flow rate you want from the pump the higher its amp draw to achieve that. So lets use an example to illustrate.
Lets say your pump draws 4 amps at a flow of 60 and 5 amps at a flow of 80 and 6 amps at a flow of 90. You like a flow of 60. So when calibrating the controller you are setting the amp draw limit a little higher, say 5 amps. That will let you run at a flow of 60. But if you wanted to run at a flow of 70 then the controller will cut out as it will see the pump is drawing to much current for what you set it to do.
On another forum a poster posted this regarding microbore;
I understand it's going to restrict the flow, but when I went from 12mm I/d to 8mm I/d had no change what so ever. I drop another 2mm and this. 2mm surely can't make a difference? Doug Atkinson posted this in reply
It does -------, makes at least 30% reduction in flow Take a look at this;
http://www.flourmilling.co.uk/water.htmlI realise its steel pipe but I see the flow rate difference between 6 or 8mm bore steel pipe is considerable. 6mm 0.022 as opposed to 0.056 liters per sec 8mm. So a 6mm tube will only allow fractionally less than 1/2 the volume of water at 4 bar. Our hose coiled up around a hose reel will probably reduce those figures a bit more.
Hot water will have a higher (or is it lower) viscosity (less dense) so will flow better through a smaller diamt hose. So most hot water users happily use microbore hose.
http://www.frca.co.uk/Documents/100308%20Physics%20of%20flowLR.pdfInteresting read these 7 pages.
Look at the difference between Laminar flow and Turbulent flow. Once fluid in a tube reaches a certain speed it become turbulent. Once it becomes turbulent it requires 4 times the amount of pressure to double the flow rate. Fluid through hose coiled on hose reels won't be Laminar in flow but turbulent.
To calculate the area of a circle the formula is
A = π r2
A 6mm id hose is fractionally more than half the size of an 8mm hose.
A 3mm jet is a little more than twice the size of a 2mm jet.
A 1mm jet is about 1/4 of the size of a 2mm jet.
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