Hydraulic system - what's this part?

Fotoman · Apr 22, 2013

I'm doing some maintenance on my steering system while installing an autopilot and I came accross this part and I don't know what it is. It was at the very end of the two lines, just before the piston that moves the rudder. It doesn't look in good shape so I might want to replace it.

Max Simmons · Apr 22, 2013

Uniflow

Brooksie · Apr 22, 2013

I think it's a shuttle valve (lockout valve) necessary if you have two steering stations (AP pump included). Otherwise, with a single station, you don't need it and will "feel" the rudder.

Duvie · Apr 22, 2013

what type of steering system?

That part looks similar to the relief valve on my hynautic system. On my system it is also used for purging air. See the attached Hynautic document.

Codger2 · Apr 22, 2013

Brooksie said:
I think it's a shuttle valve (lockout valve) necessary if you have two steering stations (AP pump included). Otherwise, with a single station, you don't need it and will "feel" the rudder.

Fotoman · Apr 23, 2013

Duvie said:
That part looks similar to the relief valve on my hynautic system. On my system it is also used for purging air. See the attached Hynautic document.

I don't see any attached document.

123 · Apr 23, 2013

I think the most closest modern replacement could be the Vetus Single non-return valve (G1/2) with by-pass valve HS74B

See also info from Teleflex;

RickB · Apr 23, 2013

You will probably find in your installation the device is nothing more than a manifold block used to provide a convenient means to solidly mount and terminate the fixed hard lines and transition to the flexible hoses supplying the steering cylinder.

123 · Apr 23, 2013

RickB said:
You will probably find in your installation the device is nothing more than a manifold block used to provide a convenient means to solidly mount and terminate the fixed hard lines and transition to the flexible hoses supplying the steering cylinder.

Don't think so. When there is no Relief Valve or as we say in Europe a Non Return Valve installed you wil have a very uncomfortable helm, because in that case you are always fighting against the momentum of the rudder.

Shoalwaters · Apr 23, 2013

Foto: my Capillano dual-helm steering system has a #50 Uniflow valve which looks similar to the little block in your photos. I did some reading when restoring my system and I found that, whatever it does, the Uniflow valve is (a) nescessary and (b) almost impossible to replace if you break it! They can be carefully dismantled, cleaned and reassembled. Take care when screwing the pipe fittings into it as the valve body is aluminium and it is easy to damage the threads.

RickB · Apr 23, 2013

Easy enough to confirm, how many connections does it have? Does it have blanking plugs to close a spool bore or relief valve adustment shafts? Does it have 4 tube fittings or 5?

Steve · Apr 23, 2013

I vote with those with those who posted Teleflex Steering system Uniflow valve.

Fotoman · Apr 23, 2013

RickB said:
Easy enough to confirm, how many connections does it have? Does it have blanking plugs to close a spool bore or relief valve adustment shafts? Does it have 4 tube fittings or 5?

I managed to clean it today and I can provide a bit more details and answer ypur questions Rick. It has 4 fittings, 2 of them having inscriptions reading V1 and V2, the 2 others C1 and C2. I'm guessing the plugs you are talking about are what is shown on this picture.

motion30 · Apr 24, 2013

that in fact is pressure relief valve . it is certainly required on the system that has an unbalanced hydraulic ram . are usually set for nine hundred and fifty pounds also helps and bleeding the system

RickB · Apr 24, 2013

motion30 said:
that in fact is pressure relief valve.

Hmmmm, very skeptical about that. That is an odd looking "plug" on the side but it doesn't look like a relief valve cartridge. Is there only the one or is there another on the other side? Are there adjustment screws on them?

Is there a part number for that device anywhere? The cylinder looks like a Wagner but that block doesn't look like anything Wagner built.

Rebel112r · Apr 24, 2013

Looks like an old Parker Flow Control . Fitting on narrow end is a button to move a spool valve, that would change the flow of fluid, from one outlet to another. Can't say exactly what it was used for in your application. At least that is my 2 cents.

Hydraulic system - what's this part?

Fotoman

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Max Simmons

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Brooksie

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Duvie

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Codger2

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Fotoman

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123

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RickB

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123

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Shoalwaters

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Steve

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Fotoman

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motion30

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