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Industrial Process Electric Heaters - Products
Flanged Immersion Heaters
Screw-Plug Heaters
Duct Heaters
Circulation Heaters
Over-the-Side Heaters
Finned Tubular Heaters
Pipe Insert Heaters
Tubular Heaters and Elements
Temperature/Power Control Panels
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Screw-Plug Immersion Heaters:
PRODUCT DESCRIPTIONA Screw Plug Immersion Heater can have from 1 to 3 elements, or blades, either welded or brazed into the screw plug. 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. Sizes of screw plug heaters are available with 1/2", 3/4" 1", 11/4", 2" and 21/2" pipe threads. A wide selection of screw plug sizes, kilowatt ratings, voltages, sheath materials, terminal housings, and thermostats makes these compact heaters ideal for all types of applications. Screw plug immersion heaters are used for heating liquids and gases in a variety of processes. These heaters are ideal for process water heating and freeze protection. All types of oils and heat transfer solutions can also be heated using these compact easily controlled units. The direct immersion method is energy efficient and well suited for many applications.![]() ![]() ![]() ![]() Screw Plug Immersion Heater - Features:Buy Screw Plug Immersion Heaters | NPT Screw Plug Heaters
Most Common Screw Plugs:
Most Common Sheath Material:
Most Common Terminal Enclosures
Built In Thermocouple Options:
Built In Thermostats: Power Ratings
Temperature Ranges
Listed below are some of the recommended watt densities to heat various fluids and gases. (a) 90, 60 & 45 Watts/Square InchFor industrial water heating of many acqueous solutions which accept heat easily. (b) 23 Watts/Square InchIndustrial process heating of many light oils and cooling fluids for some corrosive solutions along with air and gas heating. (c) 15 & 12 Watts/Square InchFor industrial heating of medium viscosity oils, high temperature air and gas heating. (d) 8 Watts/Square InchFor heating of #5 and #6 fuel oil, viscous materials, raw crude oil and residual oils. (e) 6 Watts/Square InchFor heating #6 fuel oil, very viscous materials and fluids that do not accept heat readily. How To Order Screw Plug HeatersTelephone: 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. 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. |
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