Blomberg Window spring assembly

A home owner from San Francisco says:
February 24, 2024

I have a Blomberg double hung aluminum window that was installed about 30 years ago. The side spring mechanism has broken, and I would like to replace it. Can you help me get the correct part? The window is 4-feet x 4-feet. See the attached .pdf for some images of the part. It is 23-inches long. The spring is 10-inches.

Thank you for your help with this matter.

Mario 

A home owner from San Francisco says:
February 24, 2024
A little more detail:
The correct length (per video) is 22-inches.
It is marked with "2140"
The base is 1-1/8 inches
The window weighs 25 pounds

Looking at your product page it appears that the 22" Series 390 Channel Balance
Product Code: S390-22 with sash weight option 2140 or 2150 would be correct.

Does this sound correct to you?

Thanks again

Profile picture of Casey
Casey from SWISCO responded:
February 27, 2024

Hello,

I agree that your balance resembles the S390-22 as long as the 1-1/8" depth matches yours. As for the strength option, your stamp would normally indicate that you need 2140 options but they will be calibrated to support a sash between 15-23 lbs. If your sash weighs exactly 25 pounds, you would need 2150 options to support a  23-27 lbs sash. Take a look and thanks for posting. 

Close up view of the S390 balance top.
Close up view of the S390 balance top.

Close up view of the S390 balance shoe.
Close up view of the S390 balance shoe.
22" Series 390 Channel Balance
22" Series 390 Channel Balance
S390-22
$9.59
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