A previous model used to describe CW chemical laser performance is generalized to include rotational as well as translational nonequilibria. The resultant equations are simplified by the realistic assumption that translational and rotational relaxation rates are fast compared with convection, chemical pumping, and collisional deactivation rates. As a consequence, translational and rotational relaxations are in equilibrium with stimulated emission. A further simplification is introduced, resulting in a system of equations which is independent of rotational relaxation. An amplifier solution is presented that predicts saturation effects in accord with experiments. Fabry-Perot oscillator solutions are also presented for a multiline saturated laser and a partly saturated single-line laser. The results provide a basis for simplification of numerical codes. It is concluded that a reasonable first estimate for CW chemical laser performance can be obtained by assuming rotational equilibrium and translational nonequilibrium.