散热气阀 radiator vent cock ; radiator air valve

恒温散热气阀 Thermostatic radiator valves

热排气阀 thermal vent valve ; TVV

散热器放气阀 air cock on the radiator ; radiator vent

热气控制阀 hot air control valve

热空气延迟阀 heated air delay valve

过热器空气阀 superheater vent

热气旁通阀 Hot gas by-pass Valve

热空气调节阀 hot air control valve