The small size and big capacity of FIREROD cartridge heating units make them ideal immersion heaters in cramped quarters. When heating liquids of low viscosity, FIRERODs have the high watt density to pack more heat into tight spots. For water heating applications a rating of 150 to 300 W/in2 is recommended. (Laboratory test show that under certain conditions ratings as high as 700 W/in2 are safe.) For longer life at high watt densities:
•The FIREROD unit should be in the main body of the liquid and not in a restricted space.
•The FIREROD heater should be covered with liquids at all times.
•The heater should not be allowed to cycle on and off too frequently.
•Scale should not be allowed to form on the sheath.
When heating viscous liquids, such as oils, watt densities must be kept low to prevent carbonization at the heater sheath. FIREROD cartridges offer advantages for heating viscous materials where long life and high quality outweigh the usual economic considerations. As in all immersion applications, scale
Equipped with smaller threaded fittings than conventional immersion heaters, FIRERODs leave room for more units in the same space. Replacement of single FIREROD units in multiheater assemblies is fast and easy and avoids discarding the complete assembly.
Moisture resistant seals are available to give protection from damp atmospheres outside the tank.
Built for sustained operation at high temperatures, the FIREROD is especially valuable in
Threaded fittings are furnished in either stainless steel or brass. FIRERODs with Incoloy® or 304 stainless steel sheaths are standard but other sheath materials can be provided. Headers and sheath material should be suited to the material being heated.
Ordering Information
To order stock FIREROD immersion heaters, specify Watlow code number (from Watlow Heater’s catalog) and quantity.
For
•Diameter
•Overall length
•Immersed length
•Heated length
•Watts
•Volts
•Threaded fitting material and size
Availability
Stock: Same day shipment
To be automatically connected to the nearest North American Technical and Sales Office call:
1-800-WATLOW2
International Technical and Sales Offices: Australia, +61 (39)