Hydraulic distributor. Am I correct?

[ArtMech]

This is a distributor which I've got from metal scrap. Don't know what machine it is from. All I know it's made in Sweden.



I have only one port of remote valve on a tractor. What if I'll attach this distributor additionally to have many more ports?

The thoughts are as follows:
1. I guess there are 3 ports to be able to connect 3 double action cylinders.
2. There is 1 port to be able to connect 1 single action cylinder.
3. 1 input connection (under pressure)?
4. 1 output connection (to a tank)?

Am I correct?

Never mind about micro switches at the bottom.

 

[J_J]

What type hyd system do yu have ?

Open center hyd system with all valve sin series.

Closed center with all valve in parallel.

Hybrid with some closed and some open center.

I also do not see a relief valve.

One spool is set up for SA.

You have some plugs in ports on the other side of the valve. Is one of them marked PB.

Mark where you think the P and T is.

You can use air pressure to verify flow.

 

[ArtMech]

I think larger diameter goes to tank.



I can't answer the other questions. Needs to find out somehow.
Thanks for reminder to use air flow to verify how it goes. I have no possibility to find mark PB right now. I'll do it later.

 

[aczlan]

Its a Parker valve, so you should be able to contact Parker to find out the specs on it.
If its open center, you will always have flow from the pressure port to the tank port and one of the plugs on the end away from the two ports may come out for a power beyond port.

Aaron Z

 

[J_J]

Are any of the ports marked? P, T, PB, etc

 

[ArtMech]

Are any of the ports marked? P, T, PB, etc

I'm not in a farm right now. I'll check it when I'll be there.

Thank you fellows J_J and aczlan for your help.

 

[aczlan]

It looks to me like the port you have marked as Pressure has a P in the casting next to it and the one you have marked as Tank has some other letter (a Y perhaps?) in the casting. At the far end, there is a letter by the plug on the end, but the camera angle isnt right to pick it out.

Aaron Z

 

[J_J]

If your valve is an open center valve, and IN neutral, when you blow air into the IN port, air should exit the tank port.

If the valve is a closed center valve, in neutral, when you blow air into the IN port, no air should flow out any port.

Most open center valves will have a relief valve, and I don't see one.

 

[aczlan]

Most open center valves will have a relief valve, and I don't see one.

Might the red cap in this picture be covering one?
View attachment 426775

Aaron Z

 

[J_J]

Maybe, but is could also be a no-relief plug which is sometimes used for closed center valves.

 

[ArtMech]

Thank you, brothers, for your wasted time on a question.

One important fact I've found out today - this distributor is dismantled from a scraped hyd. forklift. Usually forklifts have 1 or 2 parallel single action cylinder(s), 2 parallel angle control cylinders and 2 in 1 offset control cylinder (if equipped). Maybe that'll help to recognize output ports.
Today I'm going to a farm and I'll find all possible marks on a distributor. I'll come back to a thread on Mon or Tue.

Thanks again.

 

[ArtMech]

So these are the marks I could find on a casting of distributor: "P", "I", double "T", double "A", double "B", "47" and "49".

"A" and "B" are on one piece of casting and another "A" and "B" on the other, which are also connected with two end pieces of casting by long bolts. Totally this distributor consists of 4 pieces of casting. Same with "47" and "49". Both marks located on two internal pieces of casting. Mark "I" was found just below the red "valve".

While blowing air into P port it exits the T port.

 

[J_J]

Can you remove the center plug on the other end of the valve for a look see.

The other plugged port may be an optional tank port.

The plugged port above the P port may be an optional P port.

It may be a convertible valve for an open center valve, a PB valve or a closed center valve.

What are the number and letters on the tag?

 

[ArtMech]

Which one "center plug" do you mean?

The tag number/letters are as follows:

HU07 - 040738E
003692
BRS 990503324

 

[J_J]

Picture below.

When you remove the potential PB plug, close off the tank port and see if air only comes out the potential port.

If the PB adapter is installed in a valve, and levers in neural, if you blow air into the IN port, air will only come out the PB port.

What this test does is to check if this port to the main gallery is open.

What happens when you install the PB adapter is to separate the tank/out path from the flow path.

 

[ArtMech]

Picture below.

When you remove the potential PB plug, close off the tank port and see if air only comes out the potential port.

If the PB adapter is installed in a valve, and levers in neural, if you blow air into the IN port, air will only come out the PB port.

What this test does is to check if this port to the main gallery is open.

What happens when you install the PB adapter is to separate the tank/out path from the flow path.

Thank You J_J, I'll check it next week in a farm and will update a thread a.s.a.p.

 

[SweBota]

Hi,

It is a VOAC ( Volvo-Atlas-Copco Hydraulics, previosly Monsun-Tison, now owned by Parker), HV07 series customer specific valve, one of the most common valve familys. They are considered very high quality and were insanely expensive. It's manufactured in 1999.

It has an inlet section, up to 10 valve sections and an end section and can be set up in a multitude of different configs. So far JJ is quite correct.

The inlet section has 2 Pressure ports, one tank port and I is for internal pressure relief. If this is plugged its set up for an external presssure relief before this valve.

The spool sections has A and B service ports. There are many different spools, including double, single, motor, float and light load spools, all with or without return flow limiters.

The end section has as default 2 Tank ports, T2 on top and T1 on the side. T1 can be converted to PB by inserting an S (serial) adapter. By inserting a B (blocking) adapter the valve can be used in constant pressure systems.
P
Spool sections can be equipped with a number of different on/off or proportional actuators and/or sensors, including pneumatic, electrical, electro-hydraulic pilot pressure valves etc.

Br

/Marcus

 

[J_J]

SweBota,

Thanks for your input.

I looked all over the Internet and saw some valves, but none that looked like the valve in question.

Nothing was mentioned about the PB or carry over port, and was a logical assumption on my part.

 

[ArtMech]

J_J, It's me, who should say big thanks to SweBota for his clarification.

 

[SweBota]

You're welcome. I had a swedish document describing this but I now also found it in english, here you go:

https://www.dropbox.com/s/9tfnju1uhr0xesv/Parker VOAC HV07_Series.pdf?dl=0

BR /Marcus