What's UL Listed Pressure?

[scythe13]

I'm looking over a fire pump catalog. There is a column that e.g. for a 300 gpm fire pump shows "87-139" UL Listed Pressure (PSI).

Do you know what is 87-139?

Hereunder is the link for the datasheet:

http://www.naffco.com/product.php?prod_id=600&groups_id=252

 

[cdafd]

Pressure range it has been listed at ???

 

[SprinklerDesigner2]

It's a catalog.

The particular fire pump model can be purchased at any pressure between 87 and 139 psi.