special pressure regulator

[aerox]

Good morning to all, on behalf of my company I am doing a research for the acquisition of a pressure regulator to mount on the test line, all of which I am not sure of the name that could have this device (if it exists, but I think so).

In practice I have a compressed air line with a pressure that can be set between 20 or 40 bar. I am looking for a device that limits the pressure between 2 and 5 bars for a few minutes, and which later gradually increased the pressure to the line pressure (20 or 40 bar). the purpose is the testing of a pressure vessel.

I would like this valve to act autonomously: the operator should operate the main tap that opens/closes the line of 20 (or 40 bar), then opens the three-way tap connected to the tank, begins the filling of compressed air starting from about 2~5 bar and in a certain time the filling increases up to the pressure of 20 (or 40) bar. at this point the operator closes the main tap and leaves the component in pressure for 5 minutes and checks any losses, then the air discharge

Is there a mechanical or electromechanical valve that can carry out this work? What's his name? so I can look for someone on the internet who produces it!

Thank you very much!

Good Sunday

 

[cacciatorino]

Is there a mechanical or electromechanical valve that can carry out this work? What's his name? so I can look for someone on the internet who produces it!

Thank you very much!

Good Sunday

there are so-called progressive start valves, but they usually work up to 10 bars, and I don't know if they have a sufficiently slow dynamic for your purpose.

There's probably more, but maybe they need an electronic control system.

 

[aerox]

Thank you very much!!! Now I know what they are called!!! :

 

[cacciatorino]

Thank you very much!!! Now I know what they are called!!! :

Please, but you're probably gonna need another kind of valve, which will be called differently. What I did to you was just a chance, but the odds I'm doing to your case are few.

 

[aerox]

I saw here and that the maximum pressure stands on the 10bars, a producer instead arrives at 17 a bar.
If I have not misunderstood the time of the transient depends on the litrating of the reservoir, for small tanks the time will be on the order of the seconds, but for example for a tank of 100lt could put much more.

If you happen to think of something or some manufacturer to whom I would be grateful to you! !

:

 

[MBT]

In practice I have a compressed air line with a pressure that can be set between 20 or 40 bar. I am looking for a device that limits the pressure between 2 and 5 bars for a few minutes, and which later gradually increased the pressure to the line pressure (20 or 40 bar).

"compressed air" and "40 bar" in the same sentence, for me, can't stay.
only exception, that for "bar" you mean a place where you drink beer or wine....

 

[aerox]

"compressed air" and "40 bar" in the same sentence, for me, can't stay.
only exception, that for "bar" you mean a place where you drink beer or wine....

I would be grateful if you give me a reason for your statement that could be useful to all, the second sentence bothered me:

 

[fcorallo]

"compressed air" and "40 bar" in the same sentence, for me, can't stay.
only exception, that for "bar" you mean a place where you drink beer or wine....

quoto in full!!!!!! is a time bomb

 

[MBT]

I would be grateful if you give me a reason for your statement that could be useful to all,

I go to memory, and if I have time tomorrow I do a research, but there should be a limit for maximum permissible pressure for compressed air. I think, but I repeat, I'm going to memory, it's on the order of 15 bars. beyond serious risks that hydrogen present in the air or other substances (water, oil, volatile substances) combine with oxygen generating explosions.
all compressors, civil or industrial, with which I had to deal with at the max 14-15 bar.
if you need higher pressure you use nitrogen

The second sentence bothered me:

It is something that happens more and more frequently.
after having spent some sleepless nights, I decided that I prefer to take care of the technical things and not the troubles of others, since others don't care about my troubles.. .

 

[paulpaul]

Good morning to all, on behalf of my company I am doing a research for the acquisition of a pressure regulator to mount on the test line, all of which I am not sure of the name that could have this device (if it exists, but I think so).

In practice I have a compressed air line with a pressure that can be set between 20 or 40 bar. I am looking for a device that limits the pressure between 2 and 5 bars for a few minutes, and which later gradually increased the pressure to the line pressure (20 or 40 bar). the purpose is the testing of a pressure vessel.

I would like this valve to act autonomously: the operator should operate the main tap that opens/closes the line of 20 (or 40 bar), then opens the three-way tap connected to the tank, begins the filling of compressed air starting from about 2~5 bar and in a certain time the filling increases up to the pressure of 20 (or 40) bar. at this point the operator closes the main tap and leaves the component in pressure for 5 minutes and checks any losses, then the air discharge

Is there a mechanical or electromechanical valve that can carry out this work? What's his name? so I can look for someone on the internet who produces it!

Thank you very much!

Good Sunday

Hi.

I would use a pressure transducer connected to a small plc that in turn controls a control valve equipped with a positioner. in the plc put into the program that best suits you for what concerns the management of the valley pressure.
If you have to take tests, I also recommend nitrogen.

I personally used kaeser compressors for compressed air up to 30 bar for a gas engine starter. pet compressors work around 40 bars but are special. There are also air applications at 300 bar, but these are also special systems with special compressors, where some knowhow is required. even more special are oxygen compressors, probably the most critical application for an alternative compressor (more than hydrogen surely).
for air tools do not go beyond the pressures they told you (10 bar approximately), and for pneumatic tests of vessels or piping beyond these pressures I agree that nitrogen is the choice of choice

 

[aerox]

I go to memory, and if I have time tomorrow I do a research, but there should be a limit for maximum permissible pressure for compressed air. I think, but I repeat, I'm going to memory, it's on the order of 15 bars. beyond serious risks that hydrogen present in the air or other substances (water, oil, volatile substances) combine with oxygen generating explosions.
all compressors, civil or industrial, with which I had to deal with at the max 14-15 bar.
if you need higher pressure you use nitrogen

It is something that happens more and more frequently.
after having spent some sleepless nights, I decided that I prefer to take care of the technical things and not the troubles of others, since others don't care about my troubles.. .

Thanks for the explanation, I am a correct person and I like to converse in the right tones in real life as in the discussion forums, I think that certain jokes can be made if there is a direct provocation, I just put a technical question... all this, however no problem;-)

 

[max81]

I know that even compressors have models that reach 30-35 bar, maybe they have what you are looking for, try to contact them.
Hi.

 

[stevie]

Good morning to all, on behalf of my company I am doing a research for the acquisition of a pressure regulator to mount on the test line, all of which I am not sure of the name that could have this device (if it exists, but I think so).

In practice I have a compressed air line with a pressure that can be set between 20 or 40 bar. I am looking for a device that limits the pressure between 2 and 5 bars for a few minutes, and which later gradually increased the pressure to the line pressure (20 or 40 bar). the purpose is the testing of a pressure vessel.

I would like this valve to act autonomously: the operator should operate the main tap that opens/closes the line of 20 (or 40 bar), then opens the three-way tap connected to the tank, begins the filling of compressed air starting from about 2~5 bar and in a certain time the filling increases up to the pressure of 20 (or 40) bar. at this point the operator closes the main tap and leaves the component in pressure for 5 minutes and checks any losses, then the air discharge

Is there a mechanical or electromechanical valve that can carry out this work? What's his name? so I can look for someone on the internet who produces it!

Thank you very much!

Good Sunday

what you are looking for is called "proportional control pressure regulator", connects it to the 0-10v analog output of a plc and the game is done. depending on the control voltage of the plc you can adjust the output pressure from the regulator.
for informational reasons I can state without doubt that there are air compressors working at 400 bar (these pressures are used alternative piston compressors), without any problem of atomic "combinations" of hydrogen with oxygen etc.
sub cylinders for example are filled at 200 bars.