... series ,heating and cooling circulator, are to heat ,cool and keep temperature of raw material of glass jacket reactor,metal reactor and biology reactor ,especially ... Air - cooled Air - cooledAir - cooledAir - cooledJacket reactor 10L ,20L ,30L20L ,30L ,50L 30L,50L,75L50L,75L,100L industrial refrigerated heating thermostat-15 ~ 200 degree