Siemens 172P-10330S 599 SERIES 2W, 2", 160CV NC STAINLESS STEEL BALL VALVE, 2-POS, SR ACTUATORSiemens 172P 10330S This 599 Series normally closed 2 way ball valve with a spring return two postion (on off) actuator assembly equipped with dual end switches, 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 2 inch valve is 160 Cv, with stainless steel ball and stem and an operating handle that can