×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Electro controlled pressure regulator

Electro controlled pressure regulator

Electro controlled pressure regulator

(OP)
I want to source an electro equivalent of a manual pressure regulator we currently have.

Spec of manual pressure regulator as follows;
- manual controlled, in-line,
- non-venting pressure regulator.
- handles both methane and oxygen (2 regulators)
- operates in an explosive environment, EX rated.
- max supply pressure = 40 Bar
- max OUTPUT pressure = 16 Bar
- Flow rate = ?, not known as yet.

I have found some "I/P Transducers" (4~20mA) for methane in explosive areas, but these are max 2 bar output.

Any ideas welcome.

Cheers,
Speedy

RE: Electro controlled pressure regulator

What about setting the supply pressure at a fixed value and using mass flow controllers to supply the gas in the desired amounts. Or I see that Tescom has an electronic pressure controller that is explosion proof.
www.tescom.com

Goodluck

StoneCold

RE: Electro controlled pressure regulator

(OP)
Maybe I should elaborate a little bit more on the application.

Basically, we are using the regulator to supply constant pressure to a charge cylinder.  When the charge cylinder retracts Methane is drawn through the regulator. The charge cylinder then extends to fill a combustion chamber. The critical issue therefore is that the gas pressure reaches the set value at the beginning of extraction. Should it not be possible to simply use a valve, controlled from the measured pressure downstream from it.
Are mass flow meters required if the final flow will be zero at the set point?
Can a PID type control be employed to differentiate between the static and dynamic pressures? That is the throttling effect from the closing valve as the set point is approached will reduce the difference between the static & dynamic values.

Cheers,
Speedy

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources