Hydraulic valve question
 

Hey all; was just wondering if someone could explain to me in lay man terms how a hydraulic valve works. I'm going to try to make a budget one down the road and I think I have all of it figured out except the valve part aka the thing that governs the back and forwards motion.

Re: Hydraulic valve question
 

There are a lot of different types of valves out there so its hard to answer your question simply, but here are a couple videos which show valves.

Close center spool valve
https://www.youtube.com/watch?v=vY_bguSNgSc

Rotary valve (not the best animation but might help)
https://www.youtube.com/watch?v=th_eOkTh9yE

Basically you are opening one port exit to the pressure from the pump while connecting the other port to the return to the tank. A spool valve does this by sliding the 'lands' (bigger parts) back and forth and a rotary valve does it by turning the cutouts so they line up with the ports. Hope this helps...

Re: Hydraulic valve question
 

Yeah. Im kinda stumped about when one port opens to push it forward, what kind of wiring makes the other port close, or go back to the return tank

Re: Hydraulic valve question
 

I remember seeing a control valve sliced in half to show exactly how porting looks inside when I was in trade school.
Do you have a college or trade school type place in your neighbourhood? I'm sure they'd have some cut open components to help show how they work?

Re: Hydraulic valve question
 

My stuff use plug type valves. I went to the local Princess Auto and bought a really cheap 3 way air valve and took it apart so that I could see it first hand. I was bad after that and took it back to the store...https://www.google.ca/url?sa=t&rct=j...gEHpI6_JXYupyw I'm sure you could find something like this at any similar store.

Re: Hydraulic valve question
 

:o. My bad. For some reason I thought you were asking about real scale hyd valves:rolleyes: on a RC site..:confused: what was I thinking:lol:

Re: Hydraulic valve question
 

Haha, no prob! (: We don't have any trade schools very close to here, but I'll look around

Re: Hydraulic valve question
 

Bump?

Re: Hydraulic valve question
 

Do a YouTube search. Plenty of videos explaining how they function.

Re: Hydraulic valve question
 

One have the 'axial slide' valve, the most common in 1:1, and the 'rotate valve', most common in scale modelling. To find out how the valve are put together is not that big problem (google/youtube) but to make one at home that holds on to any pressure is the challenge. To have good success, miniature O-rings often are to be added in the correct locations in the valve, which most of the German miniature hydraulic producers have realized, but the chineese are struggling a bit more, as some extra O-rings will ad some cent's to the production cost it seams..or whatever. Maggom newest valveblocks and pumps seams to work okay, at a relative reasonable price..as your possible 'plan B'

Re: Hydraulic valve question
 

Cool. Thanks! (:

Re: Hydraulic valve question
 

Finster: OH MY GOD--that's SO genius!!!
Thank you!!!