B&K Mueller Brass Steam Radiator Valve

Combination gas control for use in 24 Vac gas-fired, standing pilot appliances with capacities from 30 to 300 CFH. Solenoid-operated first automatic valve opens on thermostat call for heat, closes when call for heat ends. The diaphragm-operated second automatic valve opens under control of regulator, closes if gas or power supply is interrupted.