a05883
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Could someone explain what an open center remote valve is?
Thanks
Thanks
Open Center valve
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From:
Hydraulic machinery - Wikipedia, the free encyclopedia
"Open center circuits use pumps which supply a continuous flow. The flow is returned to tank through the control valve's open center; that is, when the control valve is centered, it provides an open return path to tank and the fluid is not pumped to a high pressure."
Bruce
Hydraulic machinery - Wikipedia, the free encyclopedia
"Open center circuits use pumps which supply a continuous flow. The flow is returned to tank through the control valve's open center; that is, when the control valve is centered, it provides an open return path to tank and the fluid is not pumped to a high pressure."
Bruce
Do you have a tractor with one on it?
J_J
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BH valves can be open center or closed center.
Some open center valves can be converted to closed center valve by the use of an adapter plug.
You could also switch out the valve for one that will work with your tractor.
Some open center valves can be converted to closed center valve by the use of an adapter plug.
You could also switch out the valve for one that will work with your tractor.
rambler
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You need to match up your valves to your tractor.
There are ways to convert from open to closed; my backhoe you can change a hose/valve and use it with open or closed center tractor.
Basically you want to use open center valves with tractors that have open center style pumps - these provide constant flow of oil at low pressure that curculates oil through all the valves, until a valve askes for oil & then the oil gets diverted to that use.
Closed center pumps provide a constant oil pressure. When you move a valve, the amount of oil flow changes from zero to whatever is needed to do something.
So - buy a valve to match your tractor (or pto pump, or whatever).
You shouldn't mix and match between the 2 types of valves, that doesn't work well. (Yes there are special cases as I mentioned, but that takes $$$$ special setups.....)
--->Paul
There are ways to convert from open to closed; my backhoe you can change a hose/valve and use it with open or closed center tractor.
Basically you want to use open center valves with tractors that have open center style pumps - these provide constant flow of oil at low pressure that curculates oil through all the valves, until a valve askes for oil & then the oil gets diverted to that use.
Closed center pumps provide a constant oil pressure. When you move a valve, the amount of oil flow changes from zero to whatever is needed to do something.
So - buy a valve to match your tractor (or pto pump, or whatever).
You shouldn't mix and match between the 2 types of valves, that doesn't work well. (Yes there are special cases as I mentioned, but that takes $$$$ special setups.....)
--->Paul
I have a Ford 3910 ( 42 PTO HP) that I have put over 3000 hours on. It has an open center remote valve supplying two remote outlets on the back of the tractor. I purchased the tractor new with a FEL . The dealer put a rubber bungy cord on the valve handle to hold it open. It was in that position the majority of the time, and is now 100% for the FEL because I have another tractor.
For many years I would use the same valve during hay seasons to run a hydraulic hay rake that could be reversed as a tedder and to operate my round baler lift gate up and down when expelling hay rolls.
So there you have some common uses for the valve. Tractors were much simpler back then but built to last.
The book says not to tie the valve open but that would be the case only if you had nothing attached to the remote as the pump would be operating against a dead head.
The valve is just a reversing gate with neutral for oil flow. Hooking a backhoe to it depends on the capacity of the system and the needs of the backhoe.
I use a backhoe that has its own PTO driven pump and oil tank for the best of both worlds on that particular tractor.
When hydraulic systems are asked to do more than their capacity that's when you see all the questions on this forum asking "why is it so slow" or "why won't it lift the wheels off the ground" etc, etc.
J_J
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Open center pumps and valves are connected in series and there is no or very little pressure in the system with all levers in neutral.
Closed center valves are installed in parallel, and there is usually full pressure or a low standby pressure at the valves. Hyd pump is at idle or unloaded.
A hyd gage in a tee at the IN port of a hyd valve will usually tell you what you what hyd system you have.
To answer the original question, about the open center remote valve.
It is a valve used in an open center hyd circuit which is a series hyd circuit, and is used in a remote location for whatever. Log splitter, BH, hay baler, hyd tiller, hyd bush hog, etc.
Do you know which hyd system you have.
Closed center valves are installed in parallel, and there is usually full pressure or a low standby pressure at the valves. Hyd pump is at idle or unloaded.
A hyd gage in a tee at the IN port of a hyd valve will usually tell you what you what hyd system you have.
To answer the original question, about the open center remote valve.
It is a valve used in an open center hyd circuit which is a series hyd circuit, and is used in a remote location for whatever. Log splitter, BH, hay baler, hyd tiller, hyd bush hog, etc.
Do you know which hyd system you have.