Siemens 171G-10365 599 SERIES 3W, 1-1/4", 25 CV BALL VALVE, PROPORTIONAL SPRING-RETURN ACTUATORSiemens 171G 10365 This 599 Series 3 way ball valve with a spring return Proportional (0 10V) actuator assembly, providing 200 PSI close off, is used to control hot or chilled water and up to 50% glycol solution in air handlers, convectors, fan coil units, unit conditioners, radiation and reheat coils. This 1 1 4 inch valve is 25 Cv, with chrome plated brass ball and brass stem, includes an operating handle that can manually operate valve in the event