Flanged Immersion Heaters
Flanged Immersion Heaters, both round flange and square flange models are a great choice for applications requiring larger wattages. Flanged immersion heaters are designed for installation into a pipe body, tank or pressure vessel using standard pipe size. These heaters are available in a wide selection of rates, sizes and sheath materials suitable for the heating requirements of water, air and other gases. Flanged immersion heaters are very efficient since all energy that is generated is dissipated directly into the medium which is being heated. All flanged heater models incorporate tubular heater construction welded or brazed into a carbon steel pipe flange. Nema 1 terminal enclosures are supplied with all standard units. Moisture resistant and explosion proof models are also available. A number of sheath materials like Titanium, Incoloy, Stainless Steel, Steel, and Copper can be used as required for specific applications.
Standard Flanged Immersion Heaters have a 150 lbs flanges but 300 lbs flanges are also available. To guarantee sheath material and watt density compatibility with material or process being heated consult NPH. All flanged immersion heaters we offer you including heaters for hazardous locations are CSA/NRTL and UL approved.
Flanged Immersion Heaters Specifications.pdf
How to Extend the Life of Your Immersion Heater-2.pdf
Flanged Immersion Heaters Wiring Diagrams.pdf
Flanged Immersion Heaters-Installation, Operation and Maintenance Instructions.pdf
Hot Water Storage Tanks
Heating & Preheating All Grades of Oil
Food Processing Equipment
Cleaning and Rinsing Tanks
Heat Transfer Systems
Process Air Equipment
Freeze Protection of Fluids
Oil Heating Loops
Sewage Processing/Recycling/Water Purification
STANDARD CONSTRUCTION FEATURES:
Materials Copper, steel, 304/316 stainless steel, Incoloy
Number of elements in flanges 3, 6, 9, 12, 18, 21, 27, 36, 45 plus
Element diameter 0.315 - 430"
Watt density 6.5, 15, 23, 45, 75W/in2
Materials Carbon steel, stainless steel,
Rating 150 lb. pressure class per ANSI B16.5
Sizes 3", 5", 6", 8" 10", 12", 14", 150 lb.
High conductivity elements
Filled with highest purity blends of magnesium oxide refractory (MgO) compacted to rock hard density to insure maximum thermal conductivity and maximum electrical resistance, and assure long element life.
Heavy coil construction Watt density on the heating coil is designed for low watt density operation by increasing the coil diameter and length to give maximum coil surface area and limit coil surface temperature, providing longer coil life.
SPECIAL FEATURES AVAILABLE:
Kilowatt ratings 500 kW and above available
Materials 316, 321, 347 stainless steel. Inconel, Incoloy
Ratings 300 lb. up to 2500 lb., pressure classes available
Sizes 10" , 12", 14", 16", and 18" available. Please contact NPH for
other materials or ratings.
Materials 316, 321, 347 stainless steel. Inconel. Other materials available, please contact NPH
ASME Sections I, IV, and VIII designed and certified. Baffles on elements to distribute flow. Passivation on stainless steel. Immersion lengths up to 240". Underwriters Laboratories U.L./CSA listing available. Consult NPH.
Safe operation of heaters equipped with these enclosures depends on employment of electrical wiring meeting National Electric Code and limiting maximum operating temperatures (including temperatures on outside of vessel, piping, flanges, screwplugs, 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 system malfunction.
Terminal Enclosure Types
General purpose, sheet metal, (NEMA-1) painted with enamel. Moisture resistant, Nema 4X, Explosion Proof.
Grounding Connector Standard
A solid terminal connector is standard on all NPH immersion heaters insuring positive ground and personal safety.
A thermostat protective well (thermowell) is standard on most models. This well is installed through the flange parallel with the heating elements. This 1/2" thermowell is provided for accepting a temperature sensing probe for use with a thermostat or other NPH type control system. Flexibility of the type of control can be provided to give exact process control precision to match your process needs. A contactor is needed when the line voltage and/or current exceeds the thermostat rating. Other types of controls 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. See the control Temperature Section for a complete selection.
NATIONAL PLASTIC HEATER CORROSION POLICY:
NPH cannot warrant any electric immersion heater against failure by sheath corrosion if such failure is the result of operating conditions beyond the control of the heater manufacturer. It is the responsibility of the purchaser to make the ultimate choice of sheath material based on his knowledge of chemical composition of corrosive solution, character of materials entering the solution, and controls which he maintains on the process. * Not intended for use in hazardous locations.
SPECIFICATIONS, MANUALS, TECHNICAL LETTERS & TIPS:
FLANGE IMMERSION HEATERS
How to Extend the Life of Your Immersion Heater-2.pdf
Maximizing Heater Performance-1.pdf
HEAT CALCULATION EQUATIONS:
Heat Calculation Examples:
Wattage Required to Heat Air flows:
Water Heating in an Insulated Tank:
Heating Oil in an Insulated tank:
Wattage Required to Heat Flowing Oil:
Common Industrial Heater Nema Enclosures Types: