I have designed a 3pt hitch for the rear of my SS loader. I would like to use 3 pt attatchments, ie: auger etc. Can I direct hyd flow to the rear of the loader and still have the aux hyd available to the front of the machine. If so can you tell me what I need ? I would like to be able to split the flow by some type of valve or diverter that is adjustable.
split hyd flow
- Thread starter deldirt
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J_J
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There are divider valves that split the hyd flow. Here is an 8 GPM splitter that will flow 4 GPM through one side, and 4 through the other side. The valves come is different volumes, and the ratio of splitting. It could be equal flow, or unequal flow.
https://www.surpluscenter.com/item.asp?UID=2009112215115493&item=9-6166&catname=hydraulic
This is achieved by selecting the orifice size, and that limits the GPM that will flow through the valve at a given pressure.
How many GPM is your AUX flow?
You might consider a diverter valve.
https://www.surpluscenter.com/item.asp?UID=2009112215115493&item=9-5117-A&catname=hydraulic
This is a 15 GPM valve
This valve will give you an either/or situation. The flow will go to the front AUX, or the back AUX.
If you want a certain flow, then you need this. a needle valve, 0 - 40 GPM.
https://www.surpluscenter.com/item.asp?UID=2009112215115493&item=9-5300-100&catname=hydraulic
My PT uses a valve like this to vary speed of the hyd motor.
https://www.surpluscenter.com/item.asp?UID=2009112215115493&item=9-064-75&catname=hydraulic
https://www.surpluscenter.com/item.asp?UID=2009112215115493&item=9-6166&catname=hydraulic
This is achieved by selecting the orifice size, and that limits the GPM that will flow through the valve at a given pressure.
How many GPM is your AUX flow?
You might consider a diverter valve.
https://www.surpluscenter.com/item.asp?UID=2009112215115493&item=9-5117-A&catname=hydraulic
This is a 15 GPM valve
This valve will give you an either/or situation. The flow will go to the front AUX, or the back AUX.
If you want a certain flow, then you need this. a needle valve, 0 - 40 GPM.
https://www.surpluscenter.com/item.asp?UID=2009112215115493&item=9-5300-100&catname=hydraulic
My PT uses a valve like this to vary speed of the hyd motor.
https://www.surpluscenter.com/item.asp?UID=2009112215115493&item=9-064-75&catname=hydraulic
Last edited:
Farmerford
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Deldirt:
I agree with JJ that a pressure compensated variable flow control valve like the Prince he referenced should work for you (I am assuming you have an open center system since you talk about splitting the flow). I have at least three of them on various pieces of equipment, and they are quality devices.
But consider the following in designing your circuit. The valve has three ports: IN, OUT (or priority flow), and EXCESS. Say your aux circuit is 20gpm at 3,000 psi (35hp by guess). If your tph tool is an auger that requires 8 gpm at 3,000 psi to dig at the speed you want, then the valve directs 8 gpm of input flow to the OUT (or priority) port to power the auger. But the valve does this by restricting the orifice through which the remaining 12 gpm of the pump's 20 gpm output passes so that the pressure drop across the orifice is the same 3,000 psi pressure drop in the auger circuit. There is nothing inherently wrong with that, but it means that the full 35 hp of pump output is being used. 8/20 of that hp is used to turn the auger. The remaining 12/20 is used to push the 12 gpm excess flow through the orifice in the control valve. So the 12/20 of 35hp, or about 20hp is going to heat the hydraulic oil passing through the restrictive orifice in the excess circuit of the valve.
If you don't use the auger for an extended period, you are probably okay. But 20hp of energy applied to the hydraulic fluid will increase the temperature fairly quickly.
There is no good solution (this is a major disadvantage of an open center system; fluid moves into a work circuit only when it's path back to the tank is blocked). A rotary flow divider solves this problem, but at several times the cost, and the division of flow is fixed in a rotary system.
Send us some pictures of your TPH adapter for the SS.
I agree with JJ that a pressure compensated variable flow control valve like the Prince he referenced should work for you (I am assuming you have an open center system since you talk about splitting the flow). I have at least three of them on various pieces of equipment, and they are quality devices.
But consider the following in designing your circuit. The valve has three ports: IN, OUT (or priority flow), and EXCESS. Say your aux circuit is 20gpm at 3,000 psi (35hp by guess). If your tph tool is an auger that requires 8 gpm at 3,000 psi to dig at the speed you want, then the valve directs 8 gpm of input flow to the OUT (or priority) port to power the auger. But the valve does this by restricting the orifice through which the remaining 12 gpm of the pump's 20 gpm output passes so that the pressure drop across the orifice is the same 3,000 psi pressure drop in the auger circuit. There is nothing inherently wrong with that, but it means that the full 35 hp of pump output is being used. 8/20 of that hp is used to turn the auger. The remaining 12/20 is used to push the 12 gpm excess flow through the orifice in the control valve. So the 12/20 of 35hp, or about 20hp is going to heat the hydraulic oil passing through the restrictive orifice in the excess circuit of the valve.
If you don't use the auger for an extended period, you are probably okay. But 20hp of energy applied to the hydraulic fluid will increase the temperature fairly quickly.
There is no good solution (this is a major disadvantage of an open center system; fluid moves into a work circuit only when it's path back to the tank is blocked). A rotary flow divider solves this problem, but at several times the cost, and the division of flow is fixed in a rotary system.
Send us some pictures of your TPH adapter for the SS.