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  1. #1
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    Walk in freezer pressure relief

    One of our customers has a WIF 12x12x8H with a 4 step up floor with internal ramp and door strip curtains. They have been having issues with the door closing properly and the previous contractor added a high tension assist closer. When we started up freezer and temp was about 20* the door closed properly without the high tension assist. Now that the freezer is at -5 the door will not close all the way. I noticed right before door closes a lot of air being pushed out and pressure relief was not working. I checked pressure relief and didnt notice any issues. Pressure relief Heater is working as well. I decided to replace it anyway and new one didnt work when door was opened or closed. Pressure relief is located on headed panel above door.

  2. #2
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    Aug 2002
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    The pressure relief is to allow air in.

    Something else is causing the door to hang up.

  3. #3
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    Thread Starter
    Quote Originally Posted by pecmsg View Post
    The pressure relief is to allow air in.

    Something else is causing the door to hang up.
    It’s a dual action pressure relief, Open and close. Door closed well when temp was at 20* but after a few days and now freezer at -5, not closing properly.

  4. #4
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    The purpose is to prevent the box from collapsing as the warm moist air condenses and lowers the internal pressure.

    Does the door close with little pressure when slowly pushed?

  5. #5
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    Quote Originally Posted by pecmsg View Post
    The purpose is to prevent the box from collapsing as the warm moist air condenses and lowers the internal pressure.
    He's describing a pressure relief like Bally used for years with the double flapper doors, one for allowing air in and one for air out.

  6. #6
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    Thread Starter
    Quote Originally Posted by pecmsg View Post
    The purpose is to prevent the box from collapsing as the warm moist air condenses and lowers the internal pressure.

    Does the door close with little pressure when slowly pushed?

    Its look like the picture attached but has a heater for freezer application
    Attached Images Attached Images  

  7. #7
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    From the picture and given the size of the box, your port may well be undersized.

    You can use this info from Kason to estimate which which model one (or how many) you need:

    http://www.kasonind.com/files/3814/8...ales_Sheet.pdf

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  9. #8
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    Quote Originally Posted by icemeister View Post
    From the picture and given the size of the box, your port may well be undersized.

    You can use this info from Kason to estimate which which model one (or how many) you need:

    http://www.kasonind.com/files/3814/8...ales_Sheet.pdf
    I can see that taking a while letting the air in but still dont think thats the issue with the door closing!

  10. #9
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    This is what Bally Used
    Attached Images Attached Images  

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