Hydraulic valve ??

[cub149]

OK, I want to hook up a dual spool hydraulic valve BUT I want to do it with two single spool valves. I'm not sure if I will have room for it but I'm going to try since I have two valves laying around. I need to make sure I have the plumbing down correct in my mind so I can mock it up just to see if it is possible.
1)The two ports on the front of the pump, one is a feed line and one is a return, correct?
2)The feed line goes to the "IN" side of the valve, the "OUT" goes back to the pump.
3) Now, to hook up two seperate valves all I would have to do is T into the feed "IN" line and T into the return "OUT" line.

Is my understanding of this correct?

[Matt G.]

I could be wrong but I think you need to go into one valve, out of it, and into/out of the second valve with no tees. If you do it the way you said, I don't think you'll be able to build up any pressure because the fluid will just go through the other valve and bypass the valve you are trying to use to extend/retract a cylinder.

It's also getting late so I could be wrong.

[jbollis]

I agree with Matt. They would need to be plumbed in series not parallel.

[cub149]

That makes sense to me Matt. So what you are saying is to run one line to the IN on the first valve then from the OUT of that valve to the second valves IN port and then from the OUT port of second valve back to the pump?
So you are also saying that fluid it constantly being pumped through the valves even if the valve is sitting idle? If so what you say makes sense. I was thinking that the fluid only flowed when the actuator handle was used, that is where I came up with my T idea.

[cub149]

OK, include the power steering. How would I route all of the lines. From the pump to the ps to valve 1 to valve 2 on the IN sides and back from the OUt of valve 2 to valve 1 to PS out and back to the pump? Everything is in series as one loop?

[Matt G.]

With the PS in there, I'd look for a diagram in here for proper routing. I don't know off the top of my head how that goes together, and I don't want to guess.

[cadetfarmer]

Oops;
It all depends on if you have open center, or closed center valves.

Cadet Farmer

[cub149]

Originally Posted by cadetfarmer

Oops;
It all depends on if you have open center, or closed center valves.

Cadet Farmer

I have no idea. I will be using valves from a 149

[Matt G.]

They are open center.

[cub149]

Thanks for the link Matt, the diagram is exactly what I needed. I made a new drawing with the second valve in it, will this work?