Adding a valve, how important is GPM matching pump output.

[EMB5530]

I found the style of valve I would like to add to my fel for the addition of a 3rd function.

Here is the valve3 SPOOL 25 GPM JOYSTICK LOADER VALVE W/GRAPPLE


I have a Mahindra 5530 with about 13 gpm and as you can see the valve is almost double my tractors hydraulic output. What (if any)are the negatives of this large a valve.

Or does anybody know of any similar style valves with a gpm that more closely matches my tractors gpm?

Thanks for any help!

Eric

 

[Fallon]

A high GPM valve will be flowing full capacity for your pump when it is partially open. That will kill your ability to feather it or move the cylinder slowly.

 

[J_J]

Are you sure you want a joystick valve for the remote?

It is best to match up the flow from the pump the same as the valve.

 

[wdchyd]

My experience has been to match the MAXIMUM flow that valve core with ever see.....the valve ratings are based on the max when all the flow conditions are met

During idle valve periods 13 gpm will be returning back to tank

When you go to extend a cyl at 13 gpm, the rod end displacement will be less flow going back to tank (deducting the rod displ)....but when retracting the same cyl at 13 gpm the return oil will be greater returning through the valve back to tank (adding rod displ)

I'd say the 13 gpm should be MINIMUM...and use a multiplier of 1.25 or 1.33 when sizing valve max requirements to allow for return oil

 

[J_J]

I would say that this valve is a better match for your hyd system.

2 SPOOL 14 GPM PRINCE LVR JOYSTICK LOADER VALVE

http://baileynet.com/hydraulics/dir...age=ProductDetails&line=CVLV&baileyno=220-104

The valve you posted is a unique valve in that it is a joystick valve with an additional spool intended for grapple.

It will work fine but the feather action might not be to your to your satisfaction.

 

[J_J]

My experience has been to match the MAXIMUM flow that valve core with ever see.....the valve ratings are based on the max when all the flow conditions are met

During idle valve periods 13 gpm will be returning back to tank

When you go to extend a cyl at 13 gpm, the rod end displacement will be less flow going back to tank (deducting the rod displ)....but when retracting the same cyl at 13 gpm the return oil will be greater returning through the valve back to tank (adding rod displ)

I'd say the 13 gpm should be MINIMUM...and use a multiplier of 1.25 or 1.33 when sizing valve max requirements to allow for return oil

I have never done this, but perhaps you have.

Compare the flow from a valves PB port, and the flow from the same valves OUT port with cylinders connected, and using full lever.

Just curious if the manufacturers are using port flow or actual spool flow for the valves GPM rating.

 

[EMB5530]

I would say that this valve is a better match for your hyd system.

2 SPOOL 14 GPM PRINCE LVR JOYSTICK LOADER VALVE

Two Spool Loader Valves LVR Series | Type 4-way, 4-pos. float LVR VALVE 2 SPL 220-104

The valve you posted is a unique valve in that it is a joystick valve with an additional spool intended for grapple.

It will work fine but the feather action might not be to your to your satisfaction.

The added joystick (3rd joystick spool) is why I was interested in this valve. I have a joystick valve on my tractor already but I want to add an additional function up front and instead of using a solenoid or a flow diverter I liked the idea of another joystick at fingers reach,granted I could probably add another one close it may not be as nice of an install trying to stuff that much in one spot.
I was somewhat sure that it may cause a problem feathering the valve since it is designed for much more flow than what my machine can supply, but I wanted some of "you experts" advise as I am no hydraulic guru (very far from it).

I have not seen any other valves like that that more closely match my tractors fluid flow.

Thanks to all the info so far gentlemen.
If anyone has any other good ideas toward a similar setup I am all ears.

Thanks again

 

[MtnViewRanch]

I found the style of valve I would like to add to my fel for the addition of a 3rd function.

Here is the valve3 SPOOL 25 GPM JOYSTICK LOADER VALVE W/GRAPPLE


I have a Mahindra 5530 with about 13 gpm and as you can see the valve is almost double my tractors hydraulic output. What (if any)are the negatives of this large a valve.

Or does anybody know of any similar style valves with a gpm that more closely matches my tractors gpm?

Thanks for any help!

Eric

Eric, I just shipped Fallon a 12GPM unit built by Bucher and I can probably get you a 17GPM unit if you want. It won't be as economical as the Prince unit though.

 

[EMB5530]

If you want to send me the specs/tech sheets and a price I would be interested in seeing what you can do, as I am pleased with my first purchase from you.

Thanks

 

[Fallon]

Will be a bit before I can comment on the valve's quality or functionality. Even if I do get installed this weekend, I need to measure things up for hoses & wait for them to arrive.