Increse flow by using two spool valves?

[Hows she now]

Hi,
Can anyone help with the following query? Please.
I am building a PTO driven firewood processor.
I have mounted a conventional hydraulic log splitter under the circular saw to split the cut logs.
My query relates to getting the splitter to work as fast as possible. I have plumbed the hydraulics with 1/2" hoses and use a Prince regenerative valve.

Has anyone ever tried using both of the tractors rear spool valves to supply one hydraulic ram etc in an effort to increase hydraulic flow.
The tractor is a 80hp Ford 6610, and has a flywheel as well as a back axle hydraulic pump.

For fuel economy the tractor runs at 1100 rpm when working the unit.
Thanks Kevin.

 

[mmurphy]

I guess my first responce would be is if the valve flow already matches pump flow? If valve will handle lets say 10 gpm, and pump flow is 10 gpm, then there will be nothing gained. Find out what pump flow you have on tractor.

 

[kennyd]

The short answer is no, since the valve gets it's flow from the same source. A PTO powered pump and a reservoir on the processor would yield the best results for you I think.

 

[AKKAMAAN]

Agree with kennyd's no :thumbsup:

Exception is if one valve will restrict so much, so the Pressure Relief Valve, PRV, opens,m and bypass part of flow....in that case your valve flow rating is not matching up with the pump flow....But then we are talking about a very undersized valve.....

We have had a few threads about this the last 6 months or so...

Regen valve only increase speed on extend, retract will go as normal....
This is your regenerative valve right

MODEL LSR-3060 RAPID EXTEND LOG SPLITTER VALVE
This valve is rated for 4gpm on the pump inlet....and max 25gpm out on the work port for extend.....
You should plumb that valve with 3/4" hoses on work ports....hope you bought the valve with that 3/4" option.....:confused2:

What is your cylinder numbers....bore diam, rod diam, and cyl stroke....??
And what is your pump flow rating....gpm at rpm??

"Regen" is a great feature, but it is very important to have it designed right...
(Regeneration was initially designed to help pump fill capped side when gravity or inertia make cylinder extend faster than pump capacity would allow.....)



Edit!
The weakness with the prince regen valve is the low flow capacity....

I would use this SUN regenerative valve instead....it is a separate valve that plumbs in between the regular control val;ve and the cylinder.....that way the regen flow do not have to go through the control valve, and you can use a regular Prince 3000 control valve, that is rated for a higher pump flow....

Read the pdf file on the link and get back with your cylinder numbers.....

 

[Hows she now]

Genuine thanks for your answers, much appreciated.

I agree that the tractors relief valve would be blowing if one of the rear spool valves wasn't delivering all of the flow; so that answers my question.

The information on the Sun regenerative valve is interesting, thanks I will do more research on it (not sure if I can get one here in Ireland?)

At the moment I prefer the "retract detent" feature on the Prince LSR-3060.
The one I have has 3/4" connections but the ram only has 1/2" BSP connections so I'm restricted on that front.

[The ram is a 16" stroke, 4" inner diameter (100mm) with a 2 3/8" (60mm) rod. The tractor is rated a 10 gpm.]

Once again thanks for the help. I appreciate good information and wouldn't mind paying for it. I think ye should quote a charity or cause in your posts for people like me (who are not regular posters/ visitors here) to contribute to in appreciation for your time and effort.

 

[AKKAMAAN]

The information on the Sun regenerative valve is interesting, thanks I will do more research on it (not sure if I can get one here in Ireland?)

Thay are manufactured in Portland Oregon....and there is always possible to fix shipping for a low cost over seas.....PM me if you need help with shipping...

The ram is a 16" stroke, 4" inner diameter (100mm) with a 2 3/8" (60mm) rod. The tractor is rated a 10 gpm.

Here is some math.....if your valve can deliver the flows from pump....10gpm and regen 18.4gpm total 28.4gpm....the you can expect this performance numbers....

Once again thanks for the help. I appreciate good information and wouldn't mind paying for it. I think ye should quote a charity or cause in your posts for people like me (who are not regular posters/ visitors here) to contribute to in appreciation for your time and effort.

If you signed up for TBN, you are a member as everybody else!!

No charge for info here, we all volunteer with Q's and A's and most of the times we "pay forward"....:thumbsup:

 

[J_J]

Hows she now,

Just to be clear on the purpose of the relief valves. They are designed to relieve pressure to protect the pump and other components. The pressure will build up when the amount of resistance is sufficient to restrict the flow of the fluid. The volume of the fluid will determine the speed of ram. The pressure to move the ram on the splitter with no wood, is probably no more the a couple hundred lbs.