2 1 2" 2 Way Globe Valve, Water Up To 50% Glycol, CV 63.0, 24 VAC, Proportional [0 to 10 VDC or 4 to 20 mA], Spring Re SERIE V6 Sensor de ducto de aire Rango de Presion:0 a 1" w.c. Sensor de ducto de aire para CO2 temperatura activo NPT 2 Way 55 GPM Stainless Steel Trim DCA Profile On Off(Fail Open) 100 250 Vac 1 Aux Switch Stainless Steel Trim Water Up To 50% Glycol