×
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

expansion valve adjustment

expansion valve adjustment

expansion valve adjustment

(OP)
Dear fellows:

I have two YORK 10-ton dual circuit evaporators not working at full capacity. Superheat measurements indicate values above 25 degrees F. I would like to reduce the superheat setting of the valves, but they seem to be of a fixed non-adjustable type. Is there any way to make them open a little bit, or need to change the all ? Thank you!!

RE: expansion valve adjustment

As a refrigeration mechanic I watch this forum regularily to get a very valuble perspective on design and engineering.

Adjusting expansion valves is trade talk.

Go to     http://hvac-talk.com

You'll find more than enough people on that site willing to impress thier 'wisdom' on anyone who asks.

RE: expansion valve adjustment

You may have other issues such as
1.Do you have the proper line sizes
2Is the head pressure high enough to give you a full head of liquid at the TXV
3.Is the sub cooling between 10-15*F
4.Do you have a restriction in the liquid line (bad drier) etc
5.Do you have the correct CFM air flow
6.TheSuperheat should be in the range of 12 to 20?F, no more than 25?F 6" from compressor suction valve. Superheat in the normal range indicates the valve is probably working properly, but further investigation should be made.

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