Watlow Electric Heating System Rapid Response Electric Heat Exchanger User Manual

RAPID RESPONSE ELECTRIC HEAT EXCHANGER  
Compact, Rapid  
Heating of Gases,  
Vapors and Liquids for  
Precision Applications  
Features and Benefits  
Compact size and lightweight design  
Watlow has developed an innovative circulation heater solution  
for applications that demand precise temperature control for  
gases and other fluids. The RAPID RESPONSE Heat  
Exchanger provides faster thermal response and higher power  
in a smaller footprint when compared to most other  
conventional circulation heaters. Add to this the value of high  
pressure operating capabilities in custom formations and  
integrated sensing with Watlow sensors and controllers and  
you will quickly see the advantages of using the RAPID  
RESPONSE Heat Exchanger.  
Reduces the physical space required by other  
circulation heater technologies substantially  
Fast thermal response  
Allows low flow conditions to be efficiently heated  
High and low working pressure availability  
Provides a wide range of operating pressures  
Low internal volume  
Increases heater efficiency significantly  
Minimizes overall system volumetric impact  
This patent-pending product was developed around Watlow’s  
high quality WATROD electric heating element placed inside  
of a tube designed to specifically accommodate your process  
pressure and temperature. A wide range of special fittings on  
the ends of the outer tube facilitates transition of both the fluid  
and WATROD electrical terminations.  
Use with gases and liquids  
Assures effectiveness in all media states  
Specifications  
The intimate contact of the WATROD element with your fluid  
and the low thermal mass of the overall system result in  
high-energy efficiency and fast response. If needed,  
appropriate molded insulation packages can be added for  
efficiency improvements or touch-safe protection. The design  
of this product tends to enhance the circulation of your gas or  
fluid because of the excellent convective film coefficients  
created, even at lower flow rates.  
Up to 30 amps in compact configurations  
Process temperatures up to 600°C (1200°F)  
Operating pressure up to 411 bar (6000 psi)  
Standard 208 Volt (120-480 Volt 1-phase and 3-phase  
capability)  
Optional finishes include: electro polished, bright annealed,  
passivated  
Integral inlet/outlet RTD or thermocouple sensors  
Standard 0.25 in. (6.35 mm) NPT low pressure fitting  
(standard and specialized process fittings are available and  
chosen by pressure and formation)  
If your application demands precise temperature control, let  
the RAPID RESPONSE Heat Exchanger provide the thermal  
response, wattage and space savings you need. High  
operating pressure will not be an issue. Add integrated  
sensing with Watlow sensors and controllers and you will  
have a complete thermal solution.  
Materials of construction – 304 and 316L Stainless Steel,  
Incoloy®, Copper  
Outside tube diameters: 0.5 and 0.625 in. (13 and 16 mm)  
Trim length and electrical terminations consistent with  
typical WATROD options  
Bend radii – 0.625 in. (16 mm) for flat bends, 2 in.(51 mm)  
inside diameter for coiled bends  
Applications  
Solvent replacement  
Fuel cell gas heating  
Parts cleaning  
Biomass extraction  
Refrigeration systems  
Epoxy resin  
Gas heating  
Supercritical fluids  
Humidity generation  
Bio reclamation  
Aerospace, food and  
deionized water heating  
Insulation materials available – foam rubber, castable  
ceramic and fiberglass  
components  
Patent Number: U.S. 6,944,394 B2  
Incoloy® is a registered trademark of the Special Metals Corporation.  
HAN-RRHE-0807  
 

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