In general, the discriminant is an algebraic expression that gives. information about the roots of a polynomial. In the case of a quadratic equation the discriminant is the part of. the quadratic equation that is under the radical sign.
How to Select Dampers and Louvers. Dampers and louvers are used to control the flow of air in a process system or enclosed area. Dampers are usually motorized or manually-adjustable for flow control. Louvers are often fixed for a constant flow rate.
Knowledge of these differences is imperative to the proper application of the. dampers and their performance in the life/safety system. A fire damper closes once the duct temperature reaches a high enough level to melt a. fusible link. A smoke damper closes upon the detection of smoke.