Valve, Ball, 1/2", NPT, 3.0 Cv, 3 Way, A-port Equal Percentage Flow, B-port Modified for constant common port flow, Nickel Plated Forged Brass Body with Chrome Plated Brass Ball and Nickel Plated Brass Stem for Chilled or Hot Water (250 F Maximum) Applications, up to 60% Glycol Solution