Circulation Heaters: Electric Circulation Heaters for Gases and Liquids
 Circulation heaters are used when a pressurized, circulating fluid needs to be heated. A flanged immersion heater, or a screw plug immersion heater is inserted into a into a pressure vessel. This vessel may also be called a pipe body. The fluid passing though this circulation heater will raise to the desired temperature. This heating approach greatly enhances normal immersion heaters by offering a method to give you heat on demand. Many temperature control options give you can get the exact temperature control of the heated fluid.
Circulation heaters are ideal for pre-heating fuel oil, pumping viscosity and closed loop heat transfer systems or boosting the temperature of a gas. Standard ratings from 1.5 to 465 kW in various watt densities, sheath materials, chamber materials and pressure ratings.
Circulation heaters are compact and highly efficient heaters which may be used in forced or natural circulation systems to heat flowing gases or liquids. Screw plug immersion heater or flanged immersion heater, vessel, insulation, terminal enclosure, mounting brackets and inlet and outlet connections are included. Installation is simple with only basic wiring and piping connections required. An integral thermostat is included on Series 1, 2, 3, and 5 items. An installation a maintenance manual is supplied with each circulation heater.
Circulation Heaters Features:
High efficiency heat transfer Pressure ratings to 600 lbs ANSI Standard NPT or ANSI Class 150 connections Heaters could be screwplug or flanged Stainless steel construction with Canadian Vessel Registration Various housing options available NEMA 4, 4X, explosion proof Suitable for steam, oils, chemicals, gases, corrosive solutions
Circulation Heaters Applications:
Heat Transfer Oils - Molding dies and platens, closed loop heat transfer systems for heat sensitive materials Fuel Oil Heating - Pre-heating for delivery to burners, pre-heating to pumping viscosity Water - Dishwashing and rinsing, hot water storage tanks, process water, jacketed kettles Air, Gases, Steam - Process air, boosting temperatures of gases, steam superheating
Circulation Heaters Options:
Special rating or size Moisture resistant/explosion resistant terminal enclosure Flexitallic gasket Mighty-Blade elements in some sizes flanges on inlet and outlet on certain sizes Stainless steel heating chamber 300 lb. or 600 lb. heating chamber and flange construction Baffles in chamber to increase material velocity High temperature insulation (over 500ºF application temperatures) Stand-off terminal enclosures to locate the termination from the flange surface on higher temperature processes (over 500ºF) Thermostat on Series 8 and larger units T2R Thermostat with manual reset over-temperature cut-out Thermocouple mounted near outlet for precise process control and/or welded to element sheath for high-limit protection Passivation of wetted parts Weatherproof outer jacket Solid State Controls/Control Panels ASME Certification
Circulation Heaters Specifications/Design Capabilities:
Voltages - 120 to 600 Volts Inlet/Outlet - NPT 1 /2" to 21 /2
- Flanges 2" to 14" 16" to 24" on request Heater - NPT or flange mount as required Wattage's - Varied from 150 watts to 1 Megawatt Sheath Materials - Titanium
- Monel
- Incoloy
- 316/304 Stainless
- Steel Copper
- Carbon Steel Max Temperatures - Incoloy 1600ºF (870ºC)
- 304 / 316 Stainless Steel 1200ºF (650ºC)
- Steel 750ºF (400ºC)
- Copper 350ºF (175ºC) Pressure Rating - 150, 300 or 600 Ibs Flange Materials - Standard Carbon Steel or 316/304 Stainless Gaskets - Rubber, Asbestos Free, or Spiral wound Terminal Enclosures - General Purpose (NEMA 1 )
- Moisture Resistant (NEMA 4)
- Corrosion Resistant (NEMA 4X)
- Explosion Resistant (NEMA 7)
- Explosion Moisture Resistant (NEMA 7/4) Temperature Control - Thermocouple, RTD, or Thermostat High Limit - High Limit Thermocouple, Hi Limit Tstat, Certification - ASME, CRR, Heater & Vessel Certification
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