Sizing a 3rd Function Valve for Flow

[kb12610]

Looking to ad a 3rd function remote. I have two pumps, steering at 2.6 gpm and main at 5.0 gpm. Yes that is what I have. total of 7.6 combined. Equal to about two chipmunks and a crippled squirrel.

Surplus has a valve listed that is 6.6 gpm for 59.00, only downside I see is the ports are #4.

Would it be better to go with something with more flow rate or would this be ok for a 3rd.

 

[ericm979]

It'll be on the main circuit not the steering one, which is separate. So it only needs to be large enough for 5 gpm.

 

[kb12610]

It'll be on the main circuit not the steering one, which is separate. So it only needs to be large enough for 5 gpm.

Any thoughts on the #4 port size?

 

[bnold]

It can be rated at 6.6GPM but at what pressure drop or loss?

The #4 is too small. Look up a hydraulic nomograph chart on google, very easy to use. Like this one

https://www.google.com/amp/s/www.es...t that valve off the chart at your flow rate.

 

[TractorGuy]

Won't matter for a third function that is used for intermittent use like operating a cylinder.

 

[bnold]

But is it in an open center hydraulic system?
And where is the 3rd function in the circuit?

 

[Leejohn]

Are the in and out #4 also or just the work ports? If just the work ports it well ok. Put a link to the valve you are looking at.

 

[kennyd]

I think the valve the OP is looking at is a "diverter" valve, not a true 3rd function solenoid valve (this is where links to the products your asking about helps). Since your only "diverting" the dump/curl circuit, I think it's fine. I would not put a small valve like that in the the main flow from the pump.

 

[kennyd]

Won't matter for a third function that is used for intermittent use like operating a cylinder.

But if it's a true "3rd function", then it has all of the pumps flow going through it all the time so it needs to be sized properly.

 

[kb12610]

Looking to ad a 3rd function remote. I have two pumps, steering at 2.6 gpm and main at 5.0 gpm. Yes that is what I have. total of 7.6 combined. Equal to about two chipmunks and a crippled squirrel.

Surplus has a valve listed that is 6.6 gpm for 59.00, only downside I see is the ports are #4.

Would it be better to go with something with more flow rate or would this be ok for a 3rd.

Sorry should have provided more information. Yes, this is just a selector or diverter valve. After some of the questions I realized I was assuming that my system had larger lines to begin with than what it has. My lines and cylinders are already #4.

This valve was attractive for a couple of reasons

1. The compact size
2. Built in tapped ports
3. $

I'm going to try insert a couple links to the valve and the manufacturers specs.

6.6 GPM 12 Volt DC Double Selector Valve DFE | Selector Valves | Hydraulic Valves | Hydraulics | www.surpluscenter.com

may have to copy and paste?

http://www.walvoil.com/allegati/catalogo/DFE080-D1WWEG01-US.pdf

Maybe someone more apt can fix it