Systemair Valve, B318B+TFRB24-SR-NC/FO - Valve,3Way 3/4"FPT,Cv7.4,Actuator NC/FO

Characterized Control Valve with Proportional Actuator Water Control Valve for hydronic heating and cooling systems 1/2" or 3/4" Female NPT Connections Media Temperature from 0°F to 250°F [-18°C to 120°C] Maximum Glycol concentration 60% Differential Pressure up to 50psi [345kPa] Manufactured in brass with EPDM O-rings B3 series is variety of 3-way, equal percentage flow characteristics, control valves. B311B, 1/2" Female NPT, Cv=1.9 B312B, 1/2" Female NPT, Cv=3 B318B, 3/4" Female NPT, Cv=7.4 The Valves are intended to be used with the TFRB24 Spring Return Proportional Actuator, 24V AC supply voltage and 2 to 10V DC control voltage. Normally Closed (NC) with the option of Fail Close (FC) or Fail Open (FO).