question about hydraulic valves

[WilcoKubota]

Hello,

I have a question about a hydraulic valve.

can i put more seperate valves together at this way you can see in the picture?


I hope you can help.
Wilco

 

[J_J]

You can, but you run the risk of damaging the valves. You should have a PB port on all valves except the last valve.

All tank ports should go to tank.

 

[WilcoKubota]

You can, but you run the risk of damaging the valves. You should have a PB port on all valves except the last valve.

All tank ports should go to tank.

what do you mean by PB port?

Wilco.

 

[SpringHollow]

Some valves have a Power Beyond port (PB port). This is so that you can gang valves. The first valve has priority. If it does not need the flow, the fluid goes to the next valve. The valve needs to be designed to do this (needs to have a PB port).

Ken

 

[J_J]

what do you mean by PB port?

Wilco.

PB means just that. Power Beyond to the next valve. In an open center hyd circuit, all valves are in series. This port with a PB adapter will send pump flow or Hyd power for the next valve. It has to be able to with stand full pressure, whereas the tank port only has about a 250 to 500 psi rating.

One of the reasons for the PB is to separate the pump flow from the cyl OUT flow.

In a multi valve situation, any valve can use all or part of the pump flow. Upstream valves have priority.

T or TANK means that this port should go to tank.

Look at the loader valve connection to the next valve, the PB from the loader valve is feeding the next valve, and the tank/return ports are tied together.

http://www.princehyd.com/Portals/0/products/valves/LvsInstS.pdf

 

[WilcoKubota]

So, can I do it this way, with the same valve?

Wilco

 

[J_J]

So, can I do it this way, with the same valve?

Wilco

What kind of hyd circuit are you trying to accomplish, open center or closed center.

Open center valves are connected in series , and closed center valves are in parallel.


What are your design goals?

Is this for a tractor or some other hyd endeavor?


Certain valves can be used as open center, and open center with PB. with a PB sleeve, or a closed center plug can be used to make the valve a closed center hyd system.

This valve can be converted as an open center, PB, or closed center valve.

http://www.princehyd.com/Portals/0/products/valves/Series20InstS.pdf

 

[WilcoKubota]

I'ts for a tractor, but 1 three spool valve is €190, and three single spool valve's are only €90. I don't have much money to spend so I want to make it as cheap as possible.

3 spool: SD5/3-P(KG3-120) 3X18L-AET - Hydraulicworld.nl de online specialist in hydraulische producten
1 spool: Monoblok ventiel P35R - Hydraulicworld.nl de online specialist in hydraulische producten\

Wilco.

 

[J_J]

I'ts for a tractor, but 1 three spool valve is €190, and three single spool valve's are only €90. I don't have much money to spend so I want to make it as cheap as possible.

3 spool: SD5/3-P(KG3-120) 3X18L-AET - Hydraulicworld.nl de online specialist in hydraulische producten
1 spool: Monoblok ventiel P35R - Hydraulicworld.nl de online specialist in hydraulische producten

Wilco.

Can't read the language, but you probably want a three spool valve. What do you want to control. Is this for an aux valve or remote setup for implements or T-N-T, etc?

If you are using it on an open center tractor, you can use three single spool valves if that is what you have , and if they have PB and you connect them in series.

I think I would use the three spool as it will save you in hoses and fittings, and be more convenient.

 

[WilcoKubota]

Its for a FEL, so only if they have a PB port i can connect it like this:

Wilco.

 

[J_J]

Its for a FEL, so only if they have a PB port i can connect it like this:

Wilco.

Look at the schematic at the bottom. The flow has to go through the valve and then go to another valve IN port.

http://www.surpluscenter.com/Instruct/I9- 7863.pdf

Do you need float or regen?

 

[WilcoKubota]

I don't get it very much, but i've seen the prices of a single spool valve with PB port, and i can better buy a 3 spool valve because that is cheaper.

Thank you for the help anyway.

Wilco.

 

[J_J]

That is fine, but if you have a 3pt on the tractor, you will need PB on that three spool valve.

If that is the only valve you will use, it does not have to be PB.

 

[WilcoKubota]

So the PB port has to be coupled to the 3pt?

Wilco.

 

[J_J]

Yes, that is your supply for the 3pt valve and the 3pt dumps to tank. The OUT port of the FEL valve should go to tank.

Do you need any more hyd for the rear such as a remote valve for implements, etc?

 

[WilcoKubota]

Yes, that is your supply for the 3pt valve and the 3pt dumps to tank. The OUT port of the FEL valve should go to tank.

Ok. I understand.

Do you need any more hyd for the rear such as a remote valve for implements, etc?

I already have one double action valve at the back. i think I've got a picture of it..
you can see it between the wheel and the top link, at the 1th picture.

I want to make the valve above the brake shield (I don't know the correct name.), at the 2nd picture.

Wilco

 

[J_J]

Can you provide a description of the hyd flow as it is now.

A basic tractor comes with a 3pt, so the pump flow only goes to the 3pt. It may do this through a hyd block at the middle of the tractor, or direct. You may also have a switch to switch the flow from 3pt to something else.

You said something about a valve. I only see two lines that are capped. Is there a valve for those lines?

I have a Kubota B9200 HST, and the pump flow goes through a hyd block and to the 3pt in one position of a switch, and if I switch the flow, it goes to a rear remote first and then to the 3pt. If I am not using the rear remote, I plug the two hoses together.

 

[WilcoKubota]

No, its a built in valve, the lines at the picture are to a quick male connector. I'ts an old picture because i have now female connectors on it.

Wilco

 

[ArtMech]

We were talking about the rubber pipe going to the left from the hydro cylinder area just under the seat.

 

[WilcoKubota]

I have it this way:

Wilco