SpudFiles

I need help with this, In fact not with the pump itself, but with the valve.

The pressures involved will be too high for a bought checkvalve (I doubt we even have checkvalves in hardware stores here) , so what can I do to make a custom one? I allready tried a poppet valve, but it didn't seem to seal very well... I could attempt this again but up the scale a little... so it doesn't have to be that precise...

Any other ideas though? I have access to a lathe, so don't worry if that's a requirement for your design.

Your help will be much appreciated.

a schrader?

(of making a simple diagram i will send you on msn)

SpudFarm wrote:a schrader?

(of making a simple diagram i will send you on msn)

That won't exactly hold 60-100 bars.

didn't gippeto bring one to 300bar?

Did you check the "How-To" section? Guess not.

This pump was designed with the non-lathe owner in mind.

With a lathe, you should be able to make several improvements on this simple design.


http://www.spudfiles.com/forums/easy-st ... 13277.html



Edit: And I did take a schrader to 300Bar.

Thread is here:

http://www.spudfiles.com/forums/the-fai ... 15393.html

Gippeto wrote:Did you check the "How-To" section? Guess not.

This pump was designed with the non-lathe owner in mind.

With a lathe, you should be able to make several improvements on this simple design.


http://www.spudfiles.com/forums/easy-st ... 13277.html



Edit: And I did take a schrader to 300Bar.

Thread is here:

http://www.spudfiles.com/forums/the-fai ... 15393.html

I am looking for a pump that will hold a minimum of 60 bars... wich is in fact double the pressure you used.. so I kind of did not try it..

this should do

Edit: And I did take a schrader to 300Bar.

Thread is here:

http://www.spudfiles.com/forums/the-fai ... der-valve- t15393.html


I am looking for a pump that will hold a minimum of 60 bars... wich is in fact double the pressure you used.. so I kind of did not try it..

hmm I don't get it... 60 bar is more than 300 bar?

I understand.

This was the check valve I first built for the co-ax. Burst pressure of 9000psi using yield strength of the material (316 stainless).

Threads are 1/8"npt

The ball is 1/8", the o-ring I believe is an 005. The plug is hollowed out to allow the ball to travel slightly. It also "retains" the o-ring in place.

Edit: Almost forgot, you will have to add a spring to use it in a pump.

hmm I don't get it... 60 bar is more than 300 bar?

I understand.

LOL I don't (wtf??)

anyone is willing to explain this ?

@ PolandSpud, I believe he was referring to the pump I built. It was only tested (at that time ) to 400psi (~28bar).

@gippetto ohh now that does make sense... sorry

@ necrosis of course you'll have to use much smaller diameter of the piston and possibly use a hydraulic tubing instead (or at least buy very thick walled copper pipes but I am not sure if soldering will hold ~ 1000 psi ?:? )....and add a shrader to that to cut costs


I don't see any reason why a floating piston shouldn't work so that's pretty much everything you need

it seems like a very nice project...
I've been thinking of building something like this for quite a long time
Once you get addicted to high pressures you always want to go higher.... 80 bar would satisfy me for a while...

@ Necrosis

I've been tossing this around for a while. It should be a fairly simple project with the lathe. I've just been too busy to put it together of late.

POLAND_SPUD wrote:@gippetto ohh now that does make sense... sorry

@ necrosis of course you'll have to use much smaller diameter of the piston and possibly use a hydraulic tubing instead (or at least buy very thick walled copper pipes but I am not sure if soldering will hold ~ 1000 psi

Yeah, I have hydraulic pipe lying around 8mm in diameter.

And I'll thread the connections anyway, so no need for soldering. .