[stevekennedy]

I have just read on another thread that others have had problems with trolley pumps burning out.

The trolley I have controls the flow by restricting it, causing the pump to flick on and off. This is what seems to damage the pumps.

Strikes me that we need something to change the voltage/ampage going into the pump thus slowing the pump down and reducing flow. We have one of these on our Ionics van system. the pump has lasted over a year now of daily use. It has a dial that you can turn to control the flow rate.

ANy ideas how such a device can be designed/made to work

regards!

[matt]

i guess it works on the same method as a dimmer switch ?? ??

at the start of my day, my pump will do 60 psi, at the end, most times 9 - 10 hours latter it struggles with 20 psi, this must me the battery charge is going thus the output it less, so in theory a dimmer switch would do it

Ive got a sparky mate coming around to wire up soem scockets for me in a few hours, i will ask him

[stevekennedy]

Yeah, the control on my van system looks just like a dimmer switch. You could well be on to something there. I'll check back with you later.

Thanks!

[marc al]

 a dimmer switch doesn't work - i've tried it, you need to have the correct voltage and ampage ratings, williams pumps have just developed a digital flow control system that ensures the same flow at 4ft or 42ft and bypass's the pressure switch, I can't remember thier web address but they are going to be available early April and are 85 quid each.

[Roy Harding]

This company has made such a device it was on display at the Nec, I have ordered one. The cost approximately  £80.

http://www.williamsonpumps.co.uk/WATERFEDPOLE.html

Roy

[stevekennedy]

Thanks I'll check it out. My brother in law has suggested using a "potentiometer" which will reduce the power to the pump. 2.50 from Maplins.

[Windae Cleaner]

hey steve
is that your fancy van , your making too much money boy 

are you playing golf this year ?

regarding your query ... too technical for me big man.

[Ian_Giles]

This is how most flow controls seem to work, I've been using this 60psi pump for the last 12 months, full variabilty with flow rate.
Nothing fancy, couple of bits of hose, & few bits & pieces.

This setup is how Peter Fogwill from Aquatech does it.

http://www.cleanitup.co.uk/smf/index.php?topic=6997.0

Ian