Valve,Assembly, 2 Way Normally Open, 1/2", NPT, 0-10Vdc, 2-10Vdc, 4-20mA with 500 ohm resistor, 24Vac, 2.0 Cv Two-Way Equal Percentage Flow Brass Body with Plated Brass Trim Ball Valve Spring Return Modulating, Floating or Two-Position SPDT Direct Coupled Actuator