Flanged Immersion Heaters
Flanged Immersion Heaters consist of hairpin bent tubular elements welded or brazed into a flange and provided with wiring boxes for electrical connections. Flange heaters are installed by bolting to a matching flange welded to the tank wall or nozzle. A wide selection of flange sizes, kilowatt ratings, voltages, terminal enclosures and sheath materials make these heaters ideal for all types of heating applications.
Applications
Flanged immersion heaters are one of the most widely used methods for heating gases and liquids (such as water, oil, heat transfer fluid and corrosive solutions). Designed for use in tanks and pressurized vessels, they are easy to install and maintain to provide heat for many processes. The direct immersion method is energy efficient and easily monitored and controlled.
· Hot Water Storage Tanks
· Warming Equipment
· Preheating All Grades of Oil
· Food Processing Equipment
· Cleaning and Rinsing Tanks
· Heat Transfer Systems
· Process Air Equipment
· Boiler Equipment
· Freeze Protection of Any Fluid
Technical & Application Data
Description:
These thru-the-side immersion heaters utilize standard pipe flanges ranging from 3 to 14″ in diameter to support high tank pressures of superheated steam, compressed gases or liquids. They are installed through a matching companion flange (obtainable from local industrial supply houses) to the tank wall. A wide selection of Watt densities, heating outputs and flange sizes and ratings make this an excellent heater for all tanks, vats or irregularly shaped vessels.
Features – Stock Units
Element
Materials — Copper, steel, 304 stainless steel, INCOLOY®.
Number Elements in Flanges — 3, 6, 12,18, 27, 36 and 45.
Element Diameter — 0.475″.
Watt Density — 6.5, 15, 23, 45 and 75 W/In2.
Flange
Material — Carbon steel, stainless steel.
Rating — 150 lb. pressure class per ANSI B16.5
Sizes — 3, 5, 6, 8, 10, 12 and 14″, 150 lb.
Process Control Thermowell
Materials — Copper, carbon steel, stainless steel, INCOLOY®.
1/2″ diameter.
Special Features
Kilowatt Ratings — 500 kW and above available.
Element
Materials — 316, 321, 347 stainless steel, INCONEL® and more.
Flange
Materials — 316, 321, 347 stainless steel, INCONEL®, INCOLOY® and more.
Rating — 300, 400, 600, 900, 1,500 and 2,500 lb. pressure class.
Size — 16, 18″ and larger.
Other Features
ASME Section I, IV and VIII designed and certified
Baffles to distribute flow on elements
Passivation of stainless steel
Immersion Lengths up to 240 inches
Stand-off Terminal Enclosures to isolate housing from flange in high temperature applications
Terminal Enclosures
- General Purpose, sheet metal (NEMA 1) painted with red enamel
- Combination Moisture Resistant, Explosion Resistant
- Explosion Resistant
- Moisture Resistant
- Explosion Resistant enclosures involve the use of a wiring enclosure for use in hazardous location conditions:
Class I Groups B, C & D, Division 1 & 2
Class II Groups E, F & G, Division 1 & 2
Safe operation of heaters equipped with these enclosures depends on employment of electrical wiring meeting the National Electrical Code for hazardous locations and limiting maximum operating temperatures (including temperatures on outside of vessel, piping, flanges, screw plugs, enclosures and other heat conducting parts) as dictated by flammable liquids, vapors or gases present. Approved pressure and/or temperature limiting controls must be used to assure safe operation in the event of a system malfunction.
Temperature Controls
A thermostat protective well is standard on most models. This well is installed through the flange, parallel with the heating elements. An AR type on-off mechanical control can be externally mounted to the heater with the capillary bulb installed in this well (order separately — see Controls section for details).
A contractor is needed when the line voltage and/or current exceeds the thermostat rating.
Other types of controls and sensors are available where a high degree of accuracy or a more versatile control scheme is required. Electronic controls and complete control panels are easily installed.
Other types of controls and sensors are available where a high degree of accuracy or a more versatile control scheme is required. Electronic controls and complete control panels are easily installed.
