Chromalox Big Red Book

Circulation

Circulation Heater Systems ASME & Custom Engineered Units

Features Kilowatt Selections — Custom units can produce the required kilowatt ratings with ele- ment watt densities carefully selected for the specific media.

Mounting Lugs or Mounting Saddles — Spe- cial mounting lugs or mounting configurations are available. Mounting saddles are provided with slotted mounting holes to allow for expansion. Flanges, Fittings, Nozzles and Nozzle Orien- tation — Special nozzles, nozzle flanges and nozzle orientation can be designed to meet virtually any customer requirement. Distributed Wattage Elements — Help control vessel wall temperatures on high temperature gas circulation heaters. Control Panels — Integral or remote mounted control panels with electronic controls and solid state (SCR) or contactor power con- trollers can be provided using virtually any combination of control devices. Consult the Controls Section for details. Ordering Information — Selection and design of a custom or ASME circulation heater system requires critical engineering judge- ment. Chromalox representatives can help you determine the correct specifications for your application. To properly design your entire system you should clearly define the following: The following forms PE306 or PE307 can be used to help specify the correct circulation heater system for your application. For further assistance in specifying and de- tailing your requirements, consult your Local Chromalox Sales office.

• ASME Certification to Section I, III, IV and VIII, Div. 1 PED • Custom Vessel Designs and Configurations Per Customer Specifications • Custom Designed Mechanical and Solid State Controls and Control Panels • Variety of Vessel Materials Available Including Carbon Steel and 300 Series Stainless Steels • Standard and Special Kilowatt Ratings • Standard and Special Voltages • NEMA 1, 4, 7 & 12 Control Panels and E1, E2 and E4 Terminal Enclosures • Third Party Certifications Available on Many Units Applications Customer Specifications — Chromalox satis- fies many customer requirements using exist- ing stock sub-components from our extensive inventory. However, when an application calls for a heater other than a catalog item, stock or assembled stock design, Chromalox has many special features and variations that can be added to circulation heaters to meet special customer requirements.

Vessel Pressure-Temperature Ratings — Non-ASME and ASME ratings to 2500 Lbs and operating temperatures to 1500°F are avail- able. Low temperature and cryogenic designs and ratings are also available. Series Mounted System Voltage Ratings — Standard and special volt- ages up to 600 volts. Electronic Controls and Control Panels — Electronic controls and panels for process and overtemperature control are available mounted on the units or as remote units. Process Thermocouples and Sensors — Thermocouples or RTD sensors can be mounted in vessel nozzles. Overheat Thermocouples on Sheath — Ther- mocouples can be mounted on the element sheath(s) to sense sheath temperature and protect the heater. High Temperature Standoffs for Terminal Enclosures — Terminal enclosures on high temperature heaters can be mounted with standoffs to reduce enclosure temperatures.

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