Circulation Heaters consist of an insulated pipe body containing a Screw Plug Heater or Flanged Immersion Heater assembly. They are designed to heat moving air, gases or liquids through the vessel in a single pass or re-circulating, multi-pass system. These units can be mounted horizontally or vertically and are available with a variety of pipe thread and flanged inlet and outlet options. Terminal housings are available for indoor, outdoor (weather-proof NEMA 4) and hazardous (NEMA 7) environments. Many options are available including thermostats, high limit and process thermocouples or RTD sensors.

VESSELS

	Vessel Materials Operating Pressure Inlet & Outlet	Carbon Steel, Stainless Steel, Titanium 150 lb, 300 lb & 600 lb NPT Pipe Thread and ANSI Flanged

STANDARD PLUG SIZES & MATERIALS

	NPT Sizes British Sizes- BSP, BSPP Materials	1”, 1 ¼”, 1 ½”, 2”, 2 ½” 1”, 1 ¼”, 1 ½”, 2”, 2 ½” Brass, Steel, Stainless Steel

STANDARD FLANGE SIZES & MATERIALS

	ANSI Flange Sizes ANSI Flange Rating Materials NON- ANSI Flanges	2” through 24” 150 lb, 300 lb, 600 lb Carbon Steel, Stainless Steel, Titanium Available in a variety of sizes and materials.

COMMON SHEATH MATERIALS

	SHEATH MATERIAL Copper Steel Stainless Steel Incoloy 800® Inconel 600® Titanium	APPLICATION WATT DENSITY Watt.in² Potable water 40-80 Fuel Oils Hydraulic Oils 20-25 12-25 De-Ionized, R-O, Process Water, Mild Acids 40-80 12-25 Water, Mild Alkaline Solutions, Air And Gases Maximum Sheath Temperature 1400ºF 10-125 Water, Very Alkaline Solutions, High Temperature Air And Gases Maximum Sheath Temperature 1500ºF 10-50 Sea Water, Very Alkaline Solutions, Some Acid Solutions 10-45

BUILT IN THREMOSTAT OPTIONS

	Power Ratings	Up to 240 volts, 25-amp single pole, single throw (SPST) Up to 240 volts, 25-amp double pole, single throw (DPST) Up to 600 volts, 15-amp triple pole, single throw (TPST)

	Temperature Ratings	-16 to 40°C (0-100°F) 10 to 10°C (50-250°F) 70 to 280°C (160-540°F) 160 to 370°C (320-700°F)

BUILT IN SENSOR OPTIONS

	Sensors	"K" calibration thermocouple for high limit sheath protection and fluid sensing and temperature control. "J" calibration thermocouple for high limit sheath protection and fluid sensing and temperature control. 100 Ohm RTD Sensor for fluid sensing and temperature control.