Siemens 599-10601-2.9-2.9 6W BALL VALVE 3/4", A=2.9CV, B=2.9CV, 58PSI CLOSE-OFF, FEMALE NPTSiemens 599 10601 2. 9 2. 9 6W ball valve 3 4", A=2. 9Cv, B=2. 9Cv, 58psi close off, female NPT This 3 4 inch 599 Series 6 way ball valve is used to control hot and chilled water and up to 50% Glycol solution in chilled heated beams and other four pipe systems using a single valve and actuator. Source A = 2. 9 Cv and Source B = 2. 9 Cv, linear flow characteristic and chrome plated brass ball and stainless steel stem and Cv washers. There is a handle