[JSMC]

is flow rate on presure washer controlled by engine speed?

[BDCS]

Yes - nothing else controls the flow rate given the filters etc are clean

[Neil kell]

Yes - nothing else controls the flow rate given the filters etc are clean

When you say flow rate, do you mean out put? Thats controlled by the unloader/ pressure regulator isn't it?

[JSMC]

more water aids the cleaning yeah? had a job recently and it didn't come up as good as i would have liked. Blockwork was fair age though

[Neil kell]

more water aids the cleaning yeah? had a job recently and it didn't come up as good as i would have liked. Blockwork was fair age though

Try turning the reloader counter clock wise to increase the pressure. A 3000 psi should have a max out out of about 3.5 gallons per min, I think ok, don't come on and crucify me on that.

[BDCS]

I answered the question as asked, each piston has a given stroke so the revs directly govern the flow rate.  The pressure is inversely proportional to flow rate given the same nozzle size. The unloader only limits the maximum system pressure and should play no part once the triggers opened. If you want to reduce the pressure and maintain the flow rate you need to increase the nozzle size. Physics lesson over

[JSMC]

yeah i know the adjuster on pump increases pressure but flow rate is totally different and i assume engine speed dictates this

[Alan McTernan]

I answered the question as asked, each piston has a given stroke so the revs directly govern the flow rate.  The pressure is inversely proportional to flow rate given the same nozzle size. The unloader only limits the maximum system pressure and should play no part once the triggers opened. If you want to reduce the pressure and maintain the flow rate you need to increase the nozzle size. Physics lesson over

lost me

[JSMC]

I answered the question as asked, each piston has a given stroke so the revs directly govern the flow rate.  The pressure is inversely proportional to flow rate given the same nozzle size. The unloader only limits the maximum system pressure and should play no part once the triggers opened. If you want to reduce the pressure and maintain the flow rate you need to increase the nozzle size. Physics lesson over

lost me

makes sense to me.

meant to call you regarding chemical for removing marks on that wall i posted about ages ago. got yer number in my phone

[Blast Away]

If you feel the engine is running as normal as it always has done but feel there is a dip in pressure/flow rate then maybe you'll need the seals checking/changing on the pump.

[Alan McTernan]

makes sense to me.

meant to call you regarding chemical for removing marks on that wall i posted about ages ago. got yer number in my phone

Am out quoting tomorrow so give me a buzz

[Neil kell]

I answered the question as asked, each piston has a given stroke so the revs directly govern the flow rate.  The pressure is inversely proportional to flow rate given the same nozzle size. The unloader only limits the maximum system pressure and should play no part once the triggers opened. If you want to reduce the pressure and maintain the flow rate you need to increase the nozzle size. Physics lesson over

Does PSI not dictate the out put. The lower the revs only means less wear and tear on the engine as its less revs per each time used. Nothing to do with the out put. 3000 rpm is more wear and tear on the engine thatn 1765. Whats that to do with the out put?

[Alan McTernan]

Engine speed controls the suction that the water is pulled from the tank hence flow rate!
And the unloader valve controls the PSI by creating a bottle neck in the output pipe! Thats how i reckon it anyway

Thank you and goodnight

[BDCS]

The lower rpm pumps have a larger piston size - its the swept piston volume we're talking about ! Dropping the engines rpm will reduce the flow rate of water out of the pump - if your running a gearbox or not. Neil - where are you based ?

The unloader limits the bottle neck !

[Neil kell]

Engine speed controls the suction that the water is pulled from the tank hence flow rate!
And the unloader valve controls the PSI by creating a bottle neck in the output pipe! Thats how i reckon it anyway

Thank you and goodnight

No it isn't that way. Or maybe it is and I'm just talking bull through my output pipe.  as per usual.

[Blast Away]

Engine speed controls the suction that the water is pulled from the tank hence flow rate!
And the unloader valve controls the PSI by creating a bottle neck in the output pipe! Thats how i reckon it anyway

Thank you and goodnight

No it isn't that way. Or maybe it is and I'm just talking bull through my output pipe.  as per usual.

Output pipe? You use it for input too don't ya? 

[Neil kell]

Engine speed controls the suction that the water is pulled from the tank hence flow rate!
And the unloader valve controls the PSI by creating a bottle neck in the output pipe! Thats how i reckon it anyway

Thank you and goodnight

No it isn't that way. Or maybe it is and I'm just talking bull through my output pipe.  as per usual.

Output pipe? You use it for input too don't ya? 

Yeah, more input stephanie, ha ha. Here, you'd wanna get into that brick a bit closer. Is it brick cleaning you do or brick washing your doing. Your 2 foot out, thats only gonna tiddle the mortar. And wheres your mince pie protection? Only joking, I know your a pro. Nice web site. How do you get rid of efflorece off the brick, to stop it coming back through? Graffiti remover maybe?