Hi, I am making a manifold to fit a Moog 761 servo valve to a hydraulic pump to move a ram up and down using a +-30mA signal, with a PID monitored by a glass linear encoder for feed back using a TTL signal, I am new to MOOG servo valves, and understand there is a P and X port, am I right in saying only one of these is to be used and the other blocked off, I am thinking of using the P port, is there any advantage to using the X port? I really don't understand why they have an option, Can anyone please explain?

 

I will be replacing "27" the hand operated control valve

 

@Rickstar,

Did you not receive any documentation with the servo-valve?

If not, their website usually has lots of good documents for all their products, as well as "white papers" which explain some hydraulic fundamentals and principles (as relates to their products).

I have to believe there is some kind of schematic for the particular valve (or series of similar valves), if nothing else, which might help you understand their intentions and maybe even some options. I've always found their documentation to be reasonably to very good.

Sorry; my experience is limited to trouble-shooting and explaining how a particular series of Moog valves are used on a specific line of hydraulically-operated control valves. (All the engineering was done before I had to do anything with them...! I did read some Moog documents to learn about their equipment and a little of their history and look at some of their applications.)

 

Hey Buddy, Thanks for your answer, I downloaded the manual, tried to search the documentation, but they basically only say of your using port X, don't use P and visa versa, they are connected, so makes sense, my thinking is to use port P, because it doesn't look as restricted as port X, it would flow better.