SWISCO - The Replacement Hardware Authority

Option Numbers

A professional from orlando says:
I have S351 Balances with 2310, 2320, 2330 option numbers. These are old windows and the parts may have been replace before. What is the difference between the different option numbers
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Donna from SWISCO responded:
The difference between the different stamp options for SWISCO balance Series 351 is the weight tolerances.
Please remove the window sash and place it on a scale. The weight of the window sash in pounds is needed to determine the proper stamp option.

Stamp option 2310 will carry a window sash weight range of 5 through and including 9 pounds.

Stamp option 2320 will carry a window sash weight range of 9 through and including 15 pounds.

Stamp option 2330 will carry a window sash weight range of 15 through and including 18 pounds.

Stamp option 2340 will carry a window sash weight range of 18 through and including 22 pounds

This information is based on 2 balances per sash. Balances are designed assuming friction in the jamb weather-strip will carry a portion of the sash weight. Suggested sash weights are approximate.
A quick learner from Jacksonville, Fl says:
when you says "This information is based on 2 balances per sash." you are saying that each balance is designed to hold half of the weight? so if a sash weight 15lbs than I would need two 2320 balances or two 2310?
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Donna from SWISCO responded:
Thanks for posting. You were right on the first count; for a 15 pound sash, you would need two 2320 stamped balances, or two 2330 stamped balances. I hope this answers your question.
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