The Series HX-351 (12 W/in2) and HX-353 (20 W/in2) Heatrex circulation heaters are designed for heating oil. These high quality Oil Heaters include the following standard features :
Steel sheathed 0.475" diameter heating elements
Insulated steel vessel with a galvanized jacket
NEMA Type 1 terminal enclosure
Built-on thermostat, 60-250°F range
Choice of mounting brackets or mounting pads
Flange heaters have class 150 steel flanges which meet ANSI B16.5 standards