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Industrial Process Heaters.com
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Circulation, Re-Circulation Heaters:
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PRODUCT DESCRIPTION
NPH circulation heaters feature all-welded construction of the steel shroud and flanges, hydrostatically pressure-tested ports, heavy-duty metal-sheathed heating elements of Incoloy or steel, galvanized or carbon steel containment pipe, NEMA1 terminal housings, bulb & capillary thermostats or solid-state controls, plus up to a 150-lb. forged steel flange with bolt construction connecting the terminal housing and containment vessel.
Circulation or Recirculation Heaters Specifications
Circulation Heaters
Recirculation Heaters Wiring Diagrams
How to Extend the Life of Your Circulation Heater
Circulation Heaters Features:
High
efficiency heat transfer
Pressure
ratings to 600 lbs
ANSI
Standard NPT or ANSI Class 150 connections
Heaters
could be screw plug or flanged
Stainless
steel construction with Canadian Vessel Registration
Various
housing options available NEMA 4, 4X, explosion proof
Suitable
for steam, oils, chemicals, gases, corrosive solutions
Optional Features
Weather Proof Insulated Shroud
All Stainless Steel Construction
ASME Section 8 Construction on Vessel
High Pressure Construction
High Temperature Ceramic Fiber Insulation
Passivation on all Wetted Surfaces
Other Sheath Materials: Carpenter 20, Model 400,
Inconel 600, Hastelloy, and Titanium
Applications Factors
Heater selection is influenced by the following parameters:
The Heated Medium, Viscosity, Specific Heat, Density
and Corrosive Properties
The Presence of
Contaminants in the Medium
The Corrosion
Resistant Properties of the Heated Medium
The Sheath Watt
Density of the Heating Elements (the watts/in²) and the Flow Rate of the
heated moedium
The Vessel
Design and Materials of Construction
Times, Temperature, and Pressure
Pressure Vessels
All standard pressure vessel
(tank) materials are rated to 150 lb. and made from:
Carbon
Steel
304/316
Stainless Steel
All catalog pressure vessels (tank) are steel unless otherwise noted.
COMMON SHEATH MATERIALS
Sheath Material Application Watt Density
Watts/in²
Copper Potable water 40-80
Steel Fuel Oils, Hydraulic Oils 20-25 &12-25
Stainless De-Ionized, R-O, Process Water 40-80
Steel Mild Acids 12-25
Incoloy 800 Water, Mild Alkaline Solutions, Air 10-125
and Gases, Maximum Sheath
Temperature 1400ΊF
Inconel 600 Water, Very Alkaline Solutions, 10-50
High Temperature Air And Gases
Maximum Sheath Temperature
1500ΊF
Titanium Sea Water, Very Alkaline 10-45
Solutions, Some Acid Solutions
Circulation Heaters Specifications / Design Capabilities:
Voltages. . . . . . . . . . . . . . . .120 to 600 Volts
Inlet/outlet. . . . . . . . . . . . . .N PT 1 /2" to 21 /2
Flanges 2" to 14" 16" to 24" on request
Heater. . . . . . . . . . . . . . . . .NPT or flange mount as required
Wattage's. . . . . . . . . . . . . . .Varied from 150 watts to 1 Megawatt
Sheath Materials. . . . . . . . . . Titanium, Monel, Incoloy, 316/304 Stainless,
Steel Copper, Carbon Steel
Max Temperatures. . . . . . . . . Incoloy 1600 degrees F (870 C)
304 / 316 Stainless Steel 1200 degrees F (650)
Steel 750 degrees F (400 C)Copper 350 degree F (175 C)
Pressure Rating. . . . . . . . . . . 150, 300 or 600 Ibs
Flange Materials. . . . . . . . . . .Standard Carbon Steel or 316/304 Stainless
Gaskets. . . . . . . . . . . . . . . . Rubber, Asbestos Free, or Spiral wound
Terminal Enclosures. . . . . . . . General Purpose (NEMA 1 ),
Moisture Resistant (NEMA 4), Corrosion
Resistant (NEMA 4X), Explosion Resistant (NEMA 7),
Explosion Moisture Resistant (NEMA 7/4)
Temperature control. . . . . . . .Thermocouple, RTD, or Thermostat
High Limit. . . . . . . . . . . . . . . High Limit Thermocouple, Hi Limit Tstat,
Certification. . . . . . . . . . . . . ASME, CRR, Heater & Vessel certification
How To Order Circulation, Recirculation or Closed Loop Industrial Heaters
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Telephone: 905-859-8225 Facsimile: 905-859-4691
Toll Free: 1-877-674-9744
Our industrial process electric heaters...
Our industrial process electric heaters consist of the following product categories: flanged immersion heaters, screw-plug immersion heaters, over-the-side heaters, circulation heaters, duct or air process heaters, pipe insert heaters, tubular heaters , finned tubular heaters and Temperature Control Power Panels.
Industrial process heaters are available with adjustable thermostats, digital temperature controls; SCR, mercury relay or mechanical temperature control power panels with process and high limit thermocouples.
Industrial process heaters from National Plastic Heater, Sensor and Control Inc. are Hydro approved and CSA or C UL recognized. Terminal enclosures can be NEMA 1 (General Purpose), NEMA 4, ( Moisture resistant) NEMA 4X (Corrosion/Moisture Resistant), NEMA 7 (explosion proof) and NEMA 12 (Dust and Oil Resistant).
Industrial heater 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, 600 and 1500 lbs flanges are also available.
Below a brief description of most of our industrial process heaters line-up:
Screw plug immersion heaters consist of hairpin bent tubular elements brazed or welded into a screw plug and provided with terminal boxes for electrical connections.
Screw plug immersion heaters are screwed directly through a threaded opening in a tank wall or through matching pipe coupling, half coupling or welding flange.
Circulation Heaters offer the following: High efficiency heat transfer, Pressure ratings to 600 lbs, ANSI Standard NPT or ANSI Class 150 connections, Heaters could be screw plug or flanged, Stainless steel construction with Canadian Vessel Registration, Various housing options available NEMA 4, 4X, explosion proof,
Suitable for steam, oils, chemicals, gases, corrosive solutions.
Heating using pipe insert heaters: A pipe insert heater uses an element inserted into a sealed pipe. The
advantage to the pipe insert heater is that the element is isolated from the process. This allows the element
to be removed without draining the tank, isolates hazardous or corrosive materials from deteriorating the element,
and if sized properly may allow the heat to be distributed over a larger surface area reducing the watt density
exposed to the process.
Over-the-side immersion heaters are designed for vessels where through the side immersion heaters cannot be conveniently installed. These heaters are installed through the top of the vessel with the heated portion of the unit along the side or at the bottom of the tank.
NPH Tubular heaters can be used in their straight form or bent into various shapes.
Tubular heaters can be used in free air, clamped to a surface, placed inside a groove or cast into metal.
Finned tubular heaters offer distinct advantages over open coil heaters: (a) they are safer to operate in that the risk of fire or electrical shock are minimized; (b) they have a much longer service life; and (c) they are more rugged requiring less maintenance than open coil heaters.
Duct heaters from National Plastic Heater are composed of, tubular, finned tubular or open coil heating elements that are either flanged or inserted in the duct. Duct air heaters are generally an assembly of tubular heating elements ready to mount into a duct but it can also be an open-coil resistance wire assembly mounted into a duct.
Temperature Control Power Panels, for a wide variety of applications are designed and engineered by National Plastic Heater, Sensor and Control Inc. Entire systems are available for the most complex process heating control applications that require electric heaters, temperature controls, and temperature sensors. Control power panels can be built with as little as one zone to as many as 36 or even more temperature control sensing points.
Terms and Conditions
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