Aux Hydraulic valve

[Old Doug]

I want to add another hydralic valve to something that has a 2 spool valve already. In the past i would replace the 2 spool with a 3 spool but i would like to add another valve. Can i hook it to the outlet side of the 2 spool valve?

[mrmikey]

Assuming it's an open and not a closed center system and the original valve is power beyond capable and has a power beyond plug in it you can. A quote from Mr.Google for power beyond:

In a nutshell, Power Beyond is a facility in the outlet section of a mobile directional control valve, which enables the pressure bypass gallery to be isolated from the tank gallery. By doing this, the pressure gallery can then be carried over or continued on to the P port of another directional control valve (DCV).

and for open/closed hydraulics:
https://www.munciepower.com/company/...raulic_systems ............Mike

[12V71]

If it's a stack valve its easy to add another valve section. Just have enough o-rings to re-stack the entire valve. I've done plenty of Gresen stack valves on equipment to add a valve. Used 3/8" B-7 all thread rod to hold them together.

[Old Doug]

Its not a stack valve and it does have a plug in the side of the valve. I talked to a tec at surplus center and he said i may have problems hooking valves together because it would put presser on the other valves and leak out.

[mrmikey]

..... i may have problems hooking valves together because it would put presser on the other valves and leak out.

That is the purpose of the power beyond plug, it stops the return passage on the downstream valve from being pressurized. You still need a return line to tank on the downstream valve but it's for the return oil from the cylinders not the return oil from the pump as that oil returns to tank from the upstream valve............Mike

[TJS]

Go to Prince Web site (no not the singer). The spool valve has to be power beyond capable. If it is not you cannot do it. Prince has many PDF diagrams that describe exactly what you want to do. Pretty sure the RD5000 series is what you are looking for and then you need to buy the power beyond sleeve fitting.

[Old Doug]

I looked at the prince site and it was very help full. I now need to pull the plug on my valve and see whats there and see what i have and what i need . If this would work it would be cheaper and better.

[Welder Dave]

If it's a common valve there should be info readily available. If it isn't power beyond capable, the valve you want to add could be and put it ahead of the existing valve.