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


Motorized Volume Damper - Modulating

Motorized Volume Damper - Modulating

Motorized Volume Damper - Modulating

Hello All,

Why this motorized volume damper before the Pressurization unit and after the blower fan is of modulating type? Why is it not just open or close type?

RE: Motorized Volume Damper - Modulating

Find and read the sequence of operation. You have not given enough information as it is to get a good answer.

RE: Motorized Volume Damper - Modulating

what is el-002?

RE: Motorized Volume Damper - Modulating

Typically I'd like to see those one step simpler for fans in parallel: back draft type. That does not mean this design is flawed. When in doubt of intended sequences the modulating damper has some preferable characteristics over its two-position counterpart. There is more versatility.

RE: Motorized Volume Damper - Modulating

Fans in parallel, depending upon the blade type, are difficult to control. This could be the reason for modulating dampers.

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!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close