Log splitter -- is this going to work?

   / Log splitter -- is this going to work? #21  
Yea I don't think it will work. I was just "thinking out loud". I was thinking that with a tee, only the one valve needed to be open center. Which is correct, no danger of overheat, but on the same tolken, with the one being open center, the other will never build pressure when needed either. Would allow flow, but no pressure.
 
   / Log splitter -- is this going to work? #22  
I think I am going to show more stupidity here, but how exact ally does "power beyond" ports work? If the valve is an open center valve, does the pb work with the valve in neutral? If so, what makes it develop pressure since it is open center and in neutral it is just diverting back to tank?

Sorry for the hijack. But was looking at different valves trying to come up with a solution, and this has me puzzled at the moment.
 
   / Log splitter -- is this going to work? #23  
If the PB adapter is installed, the valve in neutral will pass the fluid downstream.

In a normal open center valve, the the fluid will flow through the valve and exit the OUT/tank port at low p pressure.

If the valve has a PB option, the valve comes with the PB port plugged, and all fluid leaves the tank port.

The PB adapter separates the gallery so the pass through fluid only go out the PB port, and the cyl expended goes trough the OUT/tank port.

The PB port does not develop the pressure, but is capable of handling the high pressure.

The normal OUT/tank port is not usually capable of high pressure.
 
   / Log splitter -- is this going to work? #24  
I understand. I am used to dealing with industrial hydraulics, and pb isnt a term used.

Seems there has to be a simple way to do two function on the splitter without the lift causing the ram to stop?

More thinking out loud here: how do 2-spool open center loader valcs work? You can do 2 functions with them (lift and curl) at the same time?

Something like that. A loader valve with the lift function working as the log lift. And the curl working the ram. If only it was autocycle...
 
   / Log splitter -- is this going to work? #25  
You can do that with a divider valve or a solenoid 3rd function valve.

A divider valve with relief at say a 1/20 ratio, meaning that the log lift would get the 1 galm and the log splitter would get the rest of the flow.

1.5/30 GPM PRINCE PRIORITY FLOW DIVIDER W/RELIEF

Tractors use divider valves at the time to split the flow to steering and implements.

If you take fluid from the log splitter, it slows the cycle time.

Here is a log lift/log splitter valve.

2 SPOOL 25 GPM PRINCE LOG SPLITTER/LIFTER VALVE
 
   / Log splitter -- is this going to work? #26  
A divider valve set to allow 1 gpm to the lift would rob that 1gpm from the ram all the time correct? even if the lift wasnt being used?

The two spool valve you list would be like a loader valve. It only robs flow from the other function when it is being used. Is there a way to do that with the prince autocycle?

I can see him not wanting to loose any flow with his slow cylinder/pump combo. Same slow setup as dads splitter with 4.5"/11gpm....
 
   / Log splitter -- is this going to work? #27  
The only way to get full pump flow is sending the flow directly to the IN port of the log splitter valve.

Very few people will try and use two valves at the same time anyway.

The Prince auto-cycle valve with PB will use the fluid first and when finished, send the fluid downstream.

If you want faster time and more GPM, you need a larger pump and engine. Maybe smaller cyl.
 
   / Log splitter -- is this going to work? #28  
I know you are the "resident" hydraulic expert on this forum. And I am sure everyone appreciates your help. I know this isnt my splitter but I am curious myself and I think I am asking the questions that the OP would ask.

Basically, the following is true

option 1: Use the PB port on the auto cycle which wont allow the log lift to function until its done.

Option 2:Use the flow divider gizmo before the autocycle and bleed off a small 1 gpm to the log lift. But that 1 gpm is lost from the ram weather it is used or not.

And to sum it up, there is no valve or flow divider combo that would both allow BOTH to function at the same time yet still allow FULL flow when the log lift isnt being used. (and obviously while the log lift is operated the ram will slow down some). At least not with a autocycle valve correct?

With a non-autocycle 2-spool like you linked WOULD allow this. Like a loader valve being able to curl and lift at the same time but still allow full pump flow if only one function is used.

Do I have all that correct?
 
   / Log splitter -- is this going to work? #29  
As far as the log splitter/log lift valve that I posted, I have seen no data suggesting that both spools would operate at the same time.

However, I will check on the dual function.
 
   / Log splitter -- is this going to work?
  • Thread Starter
#30  
I know you are the "resident" hydraulic expert on this forum. And I am sure everyone appreciates your help. I know this isnt my splitter but I am curious myself and I think I am asking the questions that the OP would ask.

Basically, the following is true

option 1: Use the PB port on the auto cycle which wont allow the log lift to function until its done.

Option 2:Use the flow divider gizmo before the autocycle and bleed off a small 1 gpm to the log lift. But that 1 gpm is lost from the ram weather it is used or not.

And to sum it up, there is no valve or flow divider combo that would both allow BOTH to function at the same time yet still allow FULL flow when the log lift isnt being used. (and obviously while the log lift is operated the ram will slow down some). At least not with a autocycle valve correct?

With a non-autocycle 2-spool like you linked WOULD allow this. Like a loader valve being able to curl and lift at the same time but still allow full pump flow if only one function is used.

Do I have all that correct?


+1. You are asking the same things I was thinking.


It sounds like my best/cheapest option is to use the PB on the auto cycle to supply the log lift. I won't be able to use the lift while the auto cycle is in use.

I could see myself loading a log, starting the auto cycle and wanting to be lowering the lift at the same time.

I don't want to divert flow and slow the the cycle time even more. I'll just have to live with not using both valves at the same time :(... Until I find a good used 12-16hp engine so I can upgrade the pump.
 

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