customer asked for a additional vale on the left side of his machine to opperate the same ram,added a standard 3 position valve and tee'd into the existing supply,return and the two pipes to the double acting ram,the original mutli valve is on the left,piped it all up and pulling one lever doesnt do anything,swapped the outlet pipes over on the new valve and still the same,pull both levers and it operates the ram,the new valve is a spring return lever (with the lever in mid position i blew down the operating ports and got no bypass into the feed or return ports which is what i wanted so it wouldnt dump pressure when operating the original valve,am i missing somthing

I guess you are using a power beyond multi valve system that teeing your new valve to the P and T won't work. The power beyond acts like a tandem(p to t) that paralleling another valve will work only if you shift the multi valve simultaneously with the new valve.

This message has been edited. Last edited by: maglub,

what is the solution,the new valve slowly moves the ram,the original lever pulled doesnt move the ram,pull them both and it flies,can i fit a check valve anywhere

I "guess" you have to replace one end cover of the multi valve so that the pressure line goes to your new valve which should be P-T. It is not the same as teeing it, because the pump flow has to pass thru all the sandwich valves, then you connect the new valve(should be P-T also). I am not sure if there is a need to open an extra return port on the multi valve(maybe not).

The set up is like two tandem(P-T) in series. The one difference to an industrial tandem valves is the strengh of the return port.

Probably others can help you especially if they could locate the part number of your valves. My pc can't post drawings...

I think there is a thread like this, try it...

Power beyond, PB!!
A valve, like this, with only one return outlet can not make a PB valve down stream.


For PB option your first valve need two return outlets. One of them is plugged if PB not used.


When PB valve is installed, the upstream valve return outlets, should look like this

The upstream valve needs a Power Beyond Plug, to separate the two return outlets. The center outlet connects to downstream valve, and the side outlet connects to return (tank).

thanks for the guidance,no PB plug,connected the T to the P on the new valve,worked perfect,with both levers working independantly

A word of warning on your solution by connecting T to P on mobile valves. Most valves are designed to take minimum pressure on their tank lines . The first valve could leak around the spool orings after some use.Also built in relief valves vent through the T port so your relief setting becomes additive if you use both valves at the same time.