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Does AMS have a pressure relief or pressure limiting mechanism?

I have a number of questions about the hydromechanics of implants. Primarily, I am focused on AMS LGX (mine), but the CX and Coloplast's Titan (plus both manufacturers' narrow diameter variants) would be of interest, too.

I have heard that full inflation is achieved at around 20 psi. Can anyone provide any more information?

I have heard two stories about AMS pumps. That they do and that they do not have a mechanism built into them which prevents over-inflation. Presumably a simple pressure-relief valve returning pumped fluid to the reservoir. Coloplast pumps have apparently gone through even more design changes that may or may not include such mechanisms.

Here is what prompts my query:

My AMS LGX pump bulb goes from fairly stiff to a bit stiffer as I pump up from fully deflated to full inflation. When I reach full inflation, the bulb is pretty stiff and impossible to get a full-depth squeeze if I try to do it quickly. If I give it a slow squeeze, it is easier to get a fuller compression. However, no matter what depth of squeeze I give it, the rigidity and dimensions of my penis at this point does not change at all, no matter how many extra pumps I deliver (no matter, fast or slow). I can pump the bulb any number of times, seemingly with no upper limit on the number or depth of the squeezes.

Thanks for any light you all can shed. Source citations are ALWAYS appreciated. My AMS Patient Liaison is not much help.

Lost,
I love your mind....and your work

Lost sheep
I have the same implant tried the same thing,wondered the same, have not been in contact with ams. Use a ved
And no difference??? I like taking things apart to see how they work and reassemble. Make sure to let us know when
Not if you have an answer

I agree, he seems to have an engineering background.

I am a hydraulic engineer. There is NO relief valve. Confirmed this with AMS. Working properly, start pumping and feel the pop. The bulb will squeeze to flat till about pump # 10. Then you will start to feel the bulb getting harder. On mine ( 15 cm cylinders) about 15 and it is pretty hard. Bend dick around some then do 5 more pumps and bulb is rock hard as is the dick.

Lost S,
None of the manufacturers admit to such a devise pre se. But I can tell you from 4 months of frustration that when I would lock up mine (AMS) it would just keep pumping sometimes as if normal but nothing happened. Defective pump? Maybe maybe not. Once with my new one I squeezed to fast to hard and the same thing occurred. Went to micro pumps squeezes and it kept going. So now I pump till bulb gets hard then micro squeeze for the rest. Or rather I used to. Since a few days ago I'm never fully pumping again until I get a CX revision.

oldbeek wrote:I am a hydraulic engineer. There is NO relief valve. Confirmed this with AMS. Working properly, start pumping and feel the pop. The bulb will squeeze to flat till about pump # 10. Then you will start to feel the bulb getting harder. On mine ( 15 cm cylinders) about 15 and it is pretty hard. Bend dick around some then do 5 more pumps and bulb is rock hard as is the dick.

I hear you oldbeek and thanks.

I mentioned that my AMS Patient Liaison's knowledge of AMS products does not have my confidence. How confident are you in yours?

I note that, as DougAnd posted right after your post, I have this exprrience: After my implant is fully inflated and as hsrd as it ever gets, I can continue to pump indefinitely (shallow or deep, fast or slow) and I can definitely feel fluid going somewhere and it isn't into my penis. It might be going into a bit of "slack", elasticity or expansion in the tubes or somewhere. But I doubt if there is that much slack in the system.

The Titans do not have any relief value you can pump till the ball on the pump is as hard as a ball bearing and so is your dick

This is a long shot, but what if the surgeon doesn't put enough saline in the reservoir and it goes dry?
I'd hate to think that could happen though.

This is a great topic.I have had the same experience of pumping hard and then feeling as if it is bypassing. If that happens, it is usually after I am fully pumped, and sometimes if I just wait a while I can get it to pump until the bulb is hard. I have a theory, and I might also have some answers. I think that the ball shuttle in the pump likely moves from the pump to the return position through shapes formed in the polymer that a ball or similar metal shuttle pops through. If the cavity gets deformed by pumping pressure, the saline can bypass the shuttle back to the reservoir. A little waiting and the elastomeric material recovers and I am back in business. I like to put in small pumps at the end pushing on the rounded portion of the pump hoping to create high pressure by pushing on a smaller cross section and not needing as much brute force.

I may Have the answer in hand.[b][/b]I have an AMS pump that I planned on doing a show and tell youtube video with. If I get the video done, I will attempt to cut it apart in such a way as to be able to view and understand the valve parts.