Fully insulated ASME coded & stamped Carbon Steel pressure vessel, Code H, 160 PSIGNational Board registeredASME safety relief valve set @ 150 PSIGNPT inletoutlet fittings up to 3-12"; flanged inletoutlet fittings 4" and overIncoloy sheathed immersion element complete with epoxy sealsNEMA 1 epoxy finished control panel and heater enclosureDrain valve at lowest practical vessel locationTemperature and pressure gauges panel mountedOperating temperature range 160 to 250FOnoff staging up to 90 amp ratingProportional temperature controller for units over 95 amps with complete step controllerManual reset high limit, 250 F maxElectronic low water cut off with automatic reset standard120V control circuit complete with onoff switch and indicating pilot lightSub-circuit power fusing, class "J"Industrial rated magnetic contactors