Can You Identify this Valve?

[cycle_gator]

Okay, call me a sucker, I bought this valve on E-Bay and it is not what I thought it was. Next question, can I use it for what I want to use it for? The intended purpose is to control a set of rear remotes for my tractor, including T and T. For my purposes I need a neutral center detent, spring return to center would be ideal.

Okay, now on to the valve, there are some pictures included here. The work sections seem to feed either one port or the other with a detent at the port open position, but never in neutral. Also I cannot figure out what end is inlet and what is outlet. PB is supposedly in this valve, but I have no real idea if it is or is not. Although that is not as important as it will be fed from PB on the FEL valve.

Each work section has a number cast into the body -- 130989
The control end of the spool, four little silver boxes held on by two screws have the number RX3363. One end section has 7L-4 cast into it, the other end section has 1-9 cast into it. In between the work ports there are letters stamped , K, M, M and G one letter in each section. The ports appear to be SAE, but I would not swear to that, either.

I hope some one who has been around for a while can help me identify this.

So, should I chalk this up to stupidy and go buy what I really need from a reputable dealer, or is this valve salvageable with the addition of some new spool control sections?

Thanks in advance

 

[kennyd]

I have no idea...

There are SO many options for spool valve it is a crap-shoot to even guess what you have there. Just looks at Surplus Center's page on the Prince SV series stack valve to see what I mean.

 

[AKKAMAAN]

The end with the built in relief valve is the inlet side and the other end with one open port and two plugged port is the outlet side...the plugged port in the center on the outlet side most be the one to use for power beyond...

What diameter are the spools??? use a caliper, and see if it measures even millimeters or even fractions of inches....that can give a hint in what part of the world it is made.....

Looks like a valve that haven been used....see any wear on the linkage??

You also need to determine if it is an Open Center or a Closed Center valve....Edit: ooops it should be Open Center if my power beyond theory is right....

Can you see the spool down the work ports??

Edit: This valve must have a future...looks ok to me....

oki dokie...this will keep you busy for a few minutes....

 

[cycle_gator]

Akkamaan:

Thanks for the help on the inlet and outlet. Do you suppose there is any way to tell what relief pressure is set at? Markings inside the relief valve, color of spring, etc?

Yes, I can see the spool through the ports, that is how I know it is running either one port or the other at the detents, one each at the extreme ends of the spool travel. Work port spool openings are like semi-circular notches in the spool. When centered both ports are closed. But there is nothing to keep it centered.

Valve was sold as new, there is no sign of wear and no sign it has ever had hyd. fluid in it. Reportedly a Prince valve, which, upon examination appears not to be the case. Supposededly 3000 psi (believable), 30 GPM (based on the workport and spool size this appears to be overly optimistic). Double acting it definitly is. Also reportedly is an open center valve, a bit beyond my knowledge level to determine by looking at it.

Markings all in English would have me believe it is US or Canadian manufacture, but who knows. I will mic the spool and see what I get in terms of diameter.

Do these sectional valves have gaskets between the sections or are they metal to metal fit or use a silicon "poured in place" gasket? I may disassemble the thing to see if I can learn more.

I see you are in Port Angeles, if I get desperate, I may need to take a drive

 

[kennyd]

Most stack valves have O-rings between the sections. You can download the Prince instruction to see how they do it and the torque charts.

 

[AKKAMAAN]

Akkamaan:

Thanks for the help on the inlet and outlet. Do you suppose there is any way to tell what relief pressure is set at? Markings inside the relief valve, color of spring, etc?

The only way to check the current setting on the Relief Valve, RV, is to hook the valve up to a hydraulic power unit....
You will have to reset the relief valve after installing the Control Valve, CV,....Just make sure your new system will be set below 2500psi (most likely rated for 2500 to 3000 PSI).....when we do not know the max pressure rating of this CV....

Yes, I can see the spool through the ports, that is how I know it is running either one port or the other at the detents, one each at the extreme ends of the spool travel. Work port spool openings are like semi-circular notches in the spool. When centered both ports are closed. But there is nothing to keep it centered.

Then there is no motor spool in the CV, probably good to go for double action cylinders....
Those small notches you are talking about is probably then feathering notches....

At the opposite end of spool there is a housing that should hold the centering spring.....You do not feel any springs when moving the lever(spool)??

Valve was sold as new, there is no sign of wear and no sign it has ever had hyd. fluid in it. Reportedly a Prince valve, which, upon examination appears not to be the case. Supposededly 3000 psi (believable), 30 GPM (based on the workport and spool size this appears to be overly optimistic). Double acting it definitly is. Also reportedly is an open center valve, a bit beyond my knowledge level to determine by looking at it.

Markings all in English would have me believe it is US or Canadian manufacture, but who knows. I will mic the spool and see what I get in terms of diameter.

Do these sectional valves have gaskets between the sections or are they metal to metal fit or use a silicon "poured in place" gasket? I may disassemble the thing to see if I can learn more.

As kennyd said, there are orings between the sections....do not take the section apart....we wont get any wiser from that just now.....

I see you are in Port Angeles, if I get desperate, I may need to take a drive

I go to Port Orchard almost every day...Barney White rd by airport...6.30am to 7.30am....

 

[KWentling]

You could take air and blow into the "in" port. If air comes out the "out" port it is an open center valve. You could also operate a spool and the air would show you how it operates. It would seem odd it wouldn't have a spring center position. Might hydraulic flow through the valve hold the spool in neutral until operated?

Kim

 

[cycle_gator]

Akamaan:

Heck of a commute there, brother.

Anyway,

"At the opposite end of spool there is a housing that should hold the centering spring.....You do not feel any springs when moving the lever(spool)??"

No, there is no spring action at all, only as the spool reaches the detent at each end, it springs into the detent. Would it be worth taking one of the spool control housings off to have a look inside?

The spools measure 0.625 inches, which is about 15.7 mm so it seems more likely to be of manufacter where they use english measurement.

 

[AKKAMAAN]

Akamaan:

Heck of a commute there, brother.

oh my trip is work related....I just stay for 45-60 min, then back to PA

"At the opposite end of spool there is a housing that should hold the centering spring.....You do not feel any springs when moving the lever(spool)??"

No, there is no spring action at all, only as the spool reaches the detent at each end, it springs into the detent. Would it be worth taking one of the spool control housings off to have a look inside?

Valve have been on "the shelf" for a long time and the spools might be "stuck" in some storage grease that have sorta dried out....so it is just some friction so you cant feel the springs????
Other wise, yes, just open the one of the ends caps and check/make sure if there is springs or not....usually just a couple allen schrews....

The spools measure 0.625 inches, which is about 15.7 mm so it seems more likely to be of manufacter where they use english measurement.

Oki...thats a 5/8" spool then.....now when we know spool size we can make a better estimate about flow capacity.....It's not a high capacity valve for sure....less than 20gpm I think....let's compare with some similar sized valves....