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Kenny83

  • Posts: 1131
Re: interpump
« Reply #20 on: February 15, 2013, 03:32:19 pm »
Interpump Ws 251 1450rpm 15lpm 250 bar.  What do you think up the pressure to compensate for lower flow...do you think it equates to same cleaning power as say a ws 202 ?
Maybe we are trying to achieve different things here. Have a look at the original post above.
I have heard about a chart called 'the wash factor' never seen it though and that takes into consideration everything like flow, pressure and even heat, ive tried googling it but never found it, i presume the answer your looking for would be on 'the wash factor' chart
 ???
Pressure Washing -
www.powerwashcleaning.co.uk

BDCS

  • Posts: 4777
Re: interpump
« Reply #21 on: February 15, 2013, 07:48:04 pm »
Ok - who on here uses different sized nozzles in the same machine or is it just me ? I must 5h1t at explaining this. If you run the revs flat out all of the time then ignor this but surely you must look at a wall thats painted and think I will remove all that paint so you knock back the revs and hence reduce the pressure ?
The OP if I read it correctly said he would use a smaller pump to increase the pressure - all I'm trying to get across is that his engine will still only rev to the same level so the smaller pump will only ever displace less water which will require a smaller nozzle.
Think as pressure as speed and flow as weight. If you rode a push bike into a wall at 40 mph and drove a lorry into the wall at 30 mph what would do the most damage ? This is why flow is more important than pressure. I have 250 bar @ 15 ltrs and a 200 bar @ 21 ltrs and the latter one cleans far better.

Matt Gibson

  • Posts: 2482
Re: interpump
« Reply #22 on: February 15, 2013, 08:00:02 pm »
What are you on about??   ??? ;) ;)

chris scott

  • Posts: 3414
Re: interpump
« Reply #23 on: February 15, 2013, 08:09:57 pm »
I have 250 bar @ 15 ltrs and a 200 bar @ 21 ltrs and the latter one cleans far better.
Thats all i wanted to know!!!   To what extent ?  Does the "extra" 50 bar compensate for the "lack" of 6 lpm.
I realise that 21lpm will clean better but around domestic customers i dont like to be stood around waiting on drums filling...hence less flow more pressure. I have 200 bar 15lpm and had 200bar 21lpm but not 250bar 15lpm . Hence i thought a comprmise might be 250/15.
www.cleaning-service.uk.com
www.render-cleaning.co
https://www.cleaning-service.uk.com/bromoco-systems/
Exterior cleaning specialists covering Merseyside,Lancashire and Cheshire. TEL 08000 933267

Blast Away

Re: interpump
« Reply #24 on: February 15, 2013, 09:33:24 pm »
Chris, what exactly do you draw your water from, a bucket?

chris scott

  • Posts: 3414
Re: interpump
« Reply #25 on: February 15, 2013, 10:05:48 pm »
Customers supply into a  45gallon  plastic drum. Doesn;t matter how big it is if you cant fill it quicker than you can empty it ;D
www.cleaning-service.uk.com
www.render-cleaning.co
https://www.cleaning-service.uk.com/bromoco-systems/
Exterior cleaning specialists covering Merseyside,Lancashire and Cheshire. TEL 08000 933267

Re: interpump
« Reply #26 on: February 15, 2013, 10:14:35 pm »
THks for that... after reading these posts I have now got a stinking headache and have lost the will to live   :o

What you need to do Chris is ...............................................recycle  ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D



Time to watch ... Walking dead  :P




BDCS

  • Posts: 4777
Re: interpump
« Reply #27 on: February 15, 2013, 11:33:08 pm »
Ok heres a question :- You run a recycling system and you expect to capture and recycle 87% of the water used and you start the day with 1000 ltrs, you have a 10 hp diesel running @ 21 ltrs /min but your tap only supplies 14 ltrs a minute. What size nozzle can you use if you want to run all day without stopping ? ::)roll

Kenny83

  • Posts: 1131
Re: interpump
« Reply #28 on: February 16, 2013, 12:04:01 am »
lol, im s@@t at maths but as a guess i would say you can go with your normal .65 jet because you only need to recoup 13% of the water used and 14 litres a minute is about 70% of 21lpm.... which is more than enough.. am i right? lol
 :-\
Pressure Washing -
www.powerwashcleaning.co.uk

Kenny83

  • Posts: 1131
Re: interpump
« Reply #29 on: February 16, 2013, 12:08:48 am »
Infact i just did a quick calculation and it works out that you could go all day with water source of 2.73 lpm... i think...
We're sad...   :-\
Pressure Washing -
www.powerwashcleaning.co.uk

BDCS

  • Posts: 4777
Re: interpump
« Reply #30 on: February 16, 2013, 12:15:42 am »
 ;)

Re: interpump
« Reply #31 on: February 16, 2013, 05:52:29 am »
lol, im s@@t at maths but as a guess i would say you can go with your normal .65 jet because you only need to recoup 13% of the water used and 14 litres a minute is about 70% of 21lpm.... which is more than enough.. am i right? lol
 :-\

Must be me  ::)roll But I would use the 'correct' nozzle for m/c ... if reqd less power simply reduce revs Or I would spend all day farting around with nozzle sizes

Chris original q - No