Siemens 171C-10601-4.7-4.7 6W BALL VALVE 3/4", A=4.7CV, B=4.7CV, 58PSI CLOSE-OFF, FEMALE NPT, 0-10 V NSRSiemens 171C 10601 4. 7 4. 7 This 3 4 inch 599 Series 6 way ball valve with a 0 10 Vdc control fail in place actuator assembly is used to control hot or chilled water and up to 50% Glycol solution in chilled heated beams and other four pipe systems using a single valve and actuator. 58 psi close off with 0% leakage. Source A = 4. 7 Cv and Source B = 4. 7 Cv, linear flow characteristic and chrome plated brass ball and stainless steel stem. There is a