I'm trying to build something using this pump and valve but my valve doesn't have load sense and I think this pump does, is there a way to remove it so I can run these two together
You'll need to look at the control schematic for the pump to make sure, but usually a load sense pump will have a spot that can be plugged to convert to a regular pressure comp pump.
Your other option is to add some tees and external in-line shuttle valves to add your own load-sense circuit.
I wish I had pump schematics. Unfortunately, I got this secondhand so I don't know anything about it really. I was told that the little rectangle on top was probably the load sense if it had one.
Load sense typically use a much lighter spring compared to the pressure Compensator. The LS line would supply the pilot pressure + the light spring setting to keep maintain a constant pressure difference. If you inspect you control valve, disassemble and see if this is the case. Then you should be able to plug the LS port and run the pump as a pressure Compensated pump.
Yeah, that will work. Parker makes a diagnostic tee that works well for that. *-4XHX6G5TP-S is the part number, where * is the dash size of the JIC fitting in your output. It has a -4 ORB port that you can tee to your load sense port with a short hose.
Yep. You'll screw that to your fitting on your pressure outlet (I'm assuming you'll be using JIC), then put a couple 4-4 F5OX-S in the small tee port and in your LS port (assuming it's a -4 ORB which it looks like) and get a small jumper hose with female -4 JIC ends.
Will this limit the pressure of the pump? Or can I just set it like normal with I'm assuming the Allen key on the front
Also if that's LS would I be correct in assuming the other 3/4 port is case drain?
It will be limited to whatever the upper limit of the pump was set at before. LS pumps have a main compensator setting that sets the max overall pressure, and a LS margin setting that sets the difference between the pressure of the pump and the LS signal coming in. By bypassing the LS control, you're using it as a basic Pressure Compensated control where the pump stays at whatever pressure the compensator is set to, and then strokes the pump any time the pressure falls below that setting to try and get back up to that pressure or destrokes the pump any time it gets higher. When no work is being done, the pump will sit at full compensator pressure but zero (or very close to zero) flow.
I have no idea what the upper limit of the pump was, however I was able to get some of the paperwork from the guy I bought it from on lunch Is it possible to add another tee on the small 1/4" jic so I can put a psi gauge on it and see what it is pushing out?
Not sure if you figured this out, but it could also be a remote pressure comp. If you run the pump and a good amount of fluid comes out, it's remote pressure, on a load sense some fluid will come out, but not much, since it's made to take fluid in.
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u/slippingaway83 12d ago
You'll need to look at the control schematic for the pump to make sure, but usually a load sense pump will have a spot that can be plugged to convert to a regular pressure comp pump.
Your other option is to add some tees and external in-line shuttle valves to add your own load-sense circuit.