Circulation Heaters - EX

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1 pplication irculation Heaters - RMOVL LN HTR SKT aloritech circulation heaters are suitable for use in forced flow and natural flow heating loops where a safe, lean, reliable, and efficient heating source is required. Liquid Heating Virtually any liquid may be heated provided that the system design ensure that the heater vessel remains completely full of liquid when in use. orced flow heating (with circulator pump) is mandatory when heating heavier liquids or heating liquids to high temperatures. Natural flow systems are generally limited to side arm water heating applications where the heater is mounted vertically and the top of the heater is well below the minimum tank liquid level. INSULTION STL SIN VSSL SIN IN ORN WITH SM O STION I, IV OR VIII SLIP-ON OR WL NK LN THR NOZZLS HTIN LMNTS (OPPR OR INOLOY) as Heating In gas heating applications, such as steam superheating, heating compressed air, nitrogen, ammonia, etc., flow must be sufficient to ensure that the maximum allowable vessel and sheath temperatures are not exceeded. I Thermal engineers will assist in the selection of the best heater for your particular application. all, or write factory, or contact your nearest alroitech representative or distributor. Registration irculation heaters may be classified as boilers or pressure vessels depending on fluid being heated, rating, vessel size, operating pressure and outlet temperature. Registration requirements are imposed by the jurisdiction where the heater is to be installed. I Thermal registered vessels are authorized to bear the S, H or U stamp depending on the ode classification. MOUNTIN RKTS 3/" NPT PLU OR RIN igure 2 - onstruction etails onstruction irculation heaters are essentially flange heaters mounted in welded vessels. Standard sizes use steel vessels fitted with 50 lb. flanges. Units with larger vessels and heavier flanges are available. or closed systems the heaters are designed to Sect. I, IV, or VIII of the SM ode. or high temperature use, heaters can be provided with stainless steel wetted parts and specially designed terminal boxes protected from excessive heat. onsult factory. uilt-in Limits and Thermostats N IS / NPT PLU OR THRMOWLL uilt-in high limits and thermostats are available. Standard built-in thermostat is a one pole device limited to 20V 25 amp. Whenever the heater voltage exceeds 20V or the heater current exceeds 25 amps or for three phase supply, the thermostat is intended for pilot duty only and is not factory wired to the elements. See Section of the aloritech catalog for selection of the contactor and control transformer you may require in these instances. igure - Standard Unit Mounted on Optional Stand aloritech irculation Heaters

2 Watt ensity Watt density refers to the wattage output of a heater divided by the total surface area of the heated section of all heating elements in the heater. SMNT O HTIN LMNT SUR Installation The heaters are generally suitable for horizontal or vertical vessel orientation as shown in igures 3, and 5. Outlet Note: ll heat produced by the element is transferred to the work. TUULR HTIN LMNT STION It is important to understand the basic terminal difference between an electric immersion heater and a steam or liquid heat exchanger. Unlike the steam or liquid heat exchanger, all of the heat produced by an electric heater will leave the heater. ven though the surface area in contact with the work is fixed, the heating element sheath temperature will continue to rise until the heat produced is equal to the heat transferred to the process. detailed understanding of this behaviour and the system parameters will allow the design of a suitable heater to heat virtually any liquid or gas with the only limitation being its ability to resist corrosion in highly active solutions. s a general rule, low watt density heaters will provide longer service life than high density heaters, especially when the fluid being heated is viscous or stagnant. However, low density heaters are initially more expensive and in larger systems it is best to check with the factory for assistance in optimizing the heater selection. See page 50 for recommended watt densities for some of the more common fluids. UTION - IMPROPR SLTION O WTT NSITY N RSULT IN M TO TH PROUT N ILUR O TH HTR. igure 3 - Liquid Heating or Low Temperature as Heating (Vertical Installation) igure - High Temperature as Heating (Vertical Installation) Outlet inlet Outlet inlet inlet igure 5 - as or Liquid Heating (Horizontal Installation) irculation Heaters I Thermal Technologies Inc.

3 irculation Heaters ustom esigned ssemblies Skidded circulation heater assemblies are available for process heating in chemical processing, mining, refining, etc. Our complete in-house capability... elements, vessels, N equipped machine shop, panel shop, design... directed by a team of highly skilled professionals ensures that our products will provide value. Registered engineers are available for start-up supervision anywhere in the world. Multiple staged assemblies with control panel, valving, pumps or fans, chillers, expansion tanks, etc. can be engineered and fabricated by I Thermal using state-of-the-art technology and manufacturing procedures If it can be done electronically, chances are we ve done it before. esign proposals are submitted without cost or obligation on receipt of the bid request and specifications. aloritech irculation Heaters

4 Miniature irculation Heaters Miniature circulation heaters provide an economical source of heat in many applications. In stationary systems, these heaters do not normally require mounting support other than the inlet and outlet piping connections. onstruction The basic construction of this series of heaters is a one inch or one and a quarter inch pipe fitted with a pipe T to accept a suitable screwplug heater. The pipe is insulated with / (32 mm) to /2 (38 mm) of SK insulation protected by a 20-gauge steel casing. Units are available with or without thermostats and with general purpose, moisture resistant or explosion-proof terminal housings. If the outlet liquid or gas temperature exceeds 300 (50 ), use the end away from the terminal box as the outlet. Otherwise, use the outside threaded connection as the system inlet. Type ll wetted parts in brass or copper. Used for heating water, glycol water solutions or other liquids of low viscosity which will not corrode the heater materials. Type Incoloy elements with steel screwplug and vessel. Used for heating oils, low pressure steam, preheating instrument air, etc. Select lower watt density listings for heavier liquids. Special eatures Stainless steel wetted parts Moisture resistant or explosion-proof housings Special wattage (length will increase for same watt density) Special thermostat range 7 3/" (50 mm) " (280 mm) OUTSI THR / (5 mm) INSI THR Miniature irculation Heaters Standard Watt ensity Without Thermostat Voltages (0-20 ) Phase only W/cm² W/in² atalog atalog lbs kg Type - opper Sheath (rass Plug & With " NPT onnections).0 20, 280, 20 0P T0P.5-5P T5P P T20P ,20 30P T30P Type - Incoloy Sheath (Steel Plug & With /" NPT onnections) , 208, P2 T206P P2 T20P irculation Heaters I Thermal Technologies Inc.

5 3 irculation Heaters Type Type I Type steam or gas heating systems. onsult factory for (060) (780) (85) (790) (235) (35) (95) LU " " Watt ensity Without Thermostat Inlet/Outlet 208V, 20V 80V, 600V 50 to 250 (0 to 20 ) atalog atalog in mm Ø 3Ø Ø 3Ø W/in² W/cm² Part Part lbs kg 3" - 50 lb langed Steel With " (25 mm) Inlet nd Outlet High ensity - opper Sheath NWH T NWH T NWH-3-32 T T T High ensity - Incoloy Sheath I3063 IT I3093 IT I323 IT I683 IT I623 IT Medium ensity - Incoloy Sheath T T NWHO T NWHO-3L-303 T aloritech irculation Heaters

6 irculation Heaters Type Type I Type steam or gas heating systems. onsult factory for (220) (780) (5) (230) (260) (55) (065) LU " " Watt ensity Without Thermostat Inlet/Outlet 208V, 20V 80V, 600V 50 to 250 (0 to 20 ) atalog atalog in mm Ø 3Ø Ø 3Ø W/in² W/cm² Part Part lbs kg " - 50 lb langed Steel With / (38 mm) Inlet nd Outlet High ensity - opper Sheath T T T T T T T High ensity - Incoloy Sheath I62 IT I65 IT I68 IT I62 IT I98 IT I927 IT I936 IT Medium ensity - Incoloy Sheath T T T T T T T T irculation Heaters I Thermal Technologies Inc.

7 5 irculation Heaters Type Type I Type steam or gas heating systems. onsult factory for (220) (780) (5) (255) (270) (70) (065) LU " " Watt ensity Without Thermostat Inlet/Outlet 208V, 20V 80V, 600V 50 to 250 (0 to 20 ) atalog atalog in mm Ø 3Ø Ø 3Ø W/in² W/cm² Part Part lbs kg 5" - 50 lb langed Steel With (5 mm) Inlet nd Outlet High ensity - opper Sheath T T T NWH-5-62 T T T T High ensity - Incoloy Sheath I625 IT I655 IT I685 IT I625 IT I985 IT I9275 IT I9365 IT Medium ensity - Incoloy Sheath T T NWHO-5-62 T T T T T T aloritech irculation Heaters

8 6 irculation Heaters Type Type I Type steam or gas heating systems. onsult factory for (220) (780) (5) (280) (290) (80) (065) (50) (00) (5) (280) (290) (80) (385) LU " " Watt ensity Without Thermostat Inlet/Outlet 208V, 20V 80V, 600V 50 to 250 (0 to 20 ) atalog atalog in mm Ø 3Ø Ø 3Ø W/in² W/cm² Part Part lbs kg 6" - 50 lb langed Steel With (5 mm) Inlet nd Outlet High ensity - opper Sheath T NWH-6-28 T NHW T NWH T T T T T T High ensity - Incoloy Sheath I2366 IT I286 IT I2606 IT I2726 IT I55f6 IT55f I5606 IT I575f6 IT575f I5906 IT I8906 IT I5206 IT I86 IT Medium ensity - Incoloy Sheath NWHO-6-28 T NWHO-6-22 T NWHO T NWHO T T T T T T NWHO-6L-28 T T T T T irculation Heaters I Thermal Technologies Inc.

9 8 irculation Heaters Type Type I Type steam or gas heating systems. onsult factory for (580) (00) (65) (35) (330) (25) (25) LU " " Watt ensity Without Thermostat Inlet/Outlet 208V, 20V 80V, 600V 50 to 250 (0 to 20 ) atalog atalog in mm Ø 3Ø Ø 3Ø W/in² W/cm² Part Part lbs kg 8" - 50 lb langed Steel With 2 / (6 mm) Inlet nd Outlet High ensity - opper Sheath T T T T T T T T High ensity - Incoloy Sheath I858 IT I8728 IT I8908 IT I8088 IT I2788 IT I27088 IT I27358 IT I27628 IT I5208 IT I88 IT I2688 IT I2928 IT I27268 IT I30208 IT Medium ensity - Incoloy Sheath T T T T T T T T T T T T T aloritech irculation Heaters

10 0 irculation Heaters Type Type I Type steam or gas heating systems. onsult factory for (650) (00) (80) (05) (375) (250) (50) LU " " Watt ensity Without Thermostat Inlet/Outlet 208V, 20V 80V, 600V 50 to 250 (0 to 20 ) atalog atalog in mm Ø 3Ø Ø 3Ø W/in² W/cm² Part Part lbs kg 0" - 50 lb langed Steel With 3" (76 mm) Inlet nd Outlet High ensity - opper Sheath T T T High ensity - Incoloy Sheath I36800 IT I36260 IT I22520 IT I IT I23360 IT I8380 IT Medium ensity - Incoloy Sheath T T T T T T irculation Heaters I Thermal Technologies Inc.

11 2 irculation Heaters Type Type I Type steam or gas heating systems. onsult factory for (655) (00) (80) (80) (0) (290) (50) LU " " Watt ensity Without Thermostat Inlet/Outlet 208V, 20V 80V, 600V 50 to 250 (0 to 20 ) atalog atalog in mm Ø 3Ø Ø 3Ø W/in² W/cm² Part Part lbs kg - 50 lb langed Steel With 3" (76 mm) Inlet nd Outlet High ensity - opper Sheath T T T T High ensity - Incoloy Sheath I8202 IT I82882 IT I5322 IT I IT I5322 IT I60802 IT Medium ensity - Incoloy Sheath T T T T T T aloritech irculation Heaters

12 irculation Heaters Type Type I Type steam or gas heating systems. onsult factory for (680) (00) (200) (535) (5) (320) (90) LU " " Watt ensity Without Thermostat Inlet/Outlet 208V, 20V 80V, 600V 50 to 250 (0 to 20 ) atalog atalog in mm Ø 3Ø Ø 3Ø W/in² W/cm² Part Part lbs kg " - 50 lb langed Steel With 3" (76 mm) Inlet nd Outlet High ensity - opper Sheath T T T T High ensity - Incoloy Sheath I60300 IT I60360 IT I7232 IT I850 IT I72576 IT I8672 IT Medium ensity - Incoloy Sheath T T T T T T irculation Heaters I Thermal Technologies Inc.

13 Special eatures lange Heaters See Section of the aloritech catalog for special flange heater features for use in circulation heater vessels. Multistage Units irculation heaters can be supplied as multistage assemblies with either vertical or horizontal vessel orientation. See igures and 2. igure Special Materials Stainless steel or special alloy construction available for corrosive liquids of high temperature gas heating when outlet temperatures are in excess of 887 (75 ). langed Inlet and Outlet igure 2 Higher Ratings Units are available for operation at higher pressures or kilowatt ratings. ross low affles ross flow baffles improve heat transfer when heating viscous fluids and high temperature gases. ree Standing rame irculation heaters may be mounted on factory supplied frame as shown. actory Mounted ontrol Panel ustom designed, fully prewired control panels are available. See pages 27 to 33 for details. Inlet and Outlet 80 part To facilitate piping inlet and outlet piping may be positioned 80 apart or as required. Specify desired location of mounting lugs in relation to inlet and outlet. (orward sketch to the factory to avoid mistakes) Valves Pressure relief valves, bleed and drain valves are available. low Switch ifferential Pressure Switch Thermocouple built-in type J or K thermocouple mounted in the outlet pipe. uilt-in ontrols Mechanical or electronic high limit controls and temperature controls are available. Larger s sizes to 36 (9 mm) diameter or larger are available with flanged inlets and outlets up to 6 (06 mm) diameter. aloritech irculation Heaters