Buy Screw Plug Immersion Heaters | NPT Screw Plug Heaters
Buy Screw Plug Immersion Heaters | NPT Screw Plug Heaters
Buy Screw Plug Immersion Heaters | NPT Screw Plug Heaters

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Screw-Plug Immersion Heaters:


Screw Plug Heater Screw Plug Heater Screw Plug Heater
Screw-Plug Immersion Heaters


PRODUCT DESCRIPTION

A 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.



Buy Screw Plug Immersion Heaters | NPT Screw Plug Heaters Screw Plug Immersion Heaters Specifications.pdf

Buy Screw Plug Immersion Heaters | NPT Screw Plug Heaters How to Extend the Life of Your Immersion Heaters-2.pdf

Buy Screw Plug Immersion Heaters | NPT Screw Plug Heaters Screw Plug Immersion_Heaters_Wiring_Diagrams-2.pdf

Buy Screw Plug Immersion Heaters | NPT Screw Plug Heaters Screw Plug Immersion Heaters-Installation, Operation and Maintenance Instructions.pdf



Screw Plug Immersion Heater - Features:

Buy Screw Plug Immersion Heaters | NPT Screw Plug Heaters

National pipe thread (NPT) screw into a mating fitting in your tank

Kilowatt range from low to medium (100 watts to 30 kw)

Easy to install into your tank

Buy Screw Plug Immersion Heaters | NPT Screw Plug Heaters 1" to 2 " NPT available

Metric and custom screw plugs can be made to match existing tank connections

General purpose terminal enclosure (NEMA 1), weather resistant terminal enclosure
    (NEMA 4), and hazardous location terminal enclosure (NEMA 7), available

Thermocouples, thermostats, and high limit controls can be built-in


Most Common Screw Plugs:

Buy Screw Plug Immersion Heaters | NPT Screw Plug Heaters Brass, mild steel or 316 series stainless steel

Other materials available

1", 1 ", 1 ", 2', and 2 " NPT are most common sizes

Other sizes or metric and British thread sizes can be made


Most Common Sheath Material:

Buy Screw Plug Immersion Heaters | NPT Screw Plug Heaters Copper

Steel

Stainless Steel

Incoloy 800 & Incoloy 840

Buy Screw Plug Immersion Heaters | NPT Screw Plug Heaters Inconel 600

Titanium

Other Sheath Material Also Offered

Incoloy, Inconel are Inco Ltd registered trademarks.


Most Common Terminal Enclosures

Buy Screw Plug Immersion Heaters | NPT Screw Plug Heaters General Purpose NEMA1

Weather Resistant NEMA 4, NEMA 4X, class 4

Hazardous Location NEMA 7


Built In Thermocouple Options:

"K" calibration thermocouple for high limit sheath protection

Buy Screw Plug Immersion Heaters | NPT Screw Plug Heaters "J" calibration thermocouple for temperature control

Built In Thermostats:

Power Ratings

Up to 240 volts, 25-amp single pole, single throw (SPST)

Up to 240 volts, 25-amp double pole, single throw (DPST)

Up to 600 volts, 15-amp triple pole, single throw (TPST)


Temperature Ranges

Buy Screw Plug Immersion Heaters | NPT Screw Plug Heaters -16 to 40C (0-100F)

10 to 10C (50-250F)

70 to 280C (160-540F)

160 to 370C (320-700F)


Listed below are some of the recommended watt densities to heat various fluids and gases.

(a) 90, 60 & 45 Watts/Square Inch

For industrial water heating of many acqueous solutions which accept heat easily.

(b) 23 Watts/Square Inch

Industrial process heating of many light oils and cooling fluids for some corrosive solutions along with air and gas heating.

(c) 15 & 12 Watts/Square Inch

For industrial heating of medium viscosity oils, high temperature air and gas heating.

(d) 8 Watts/Square Inch

For heating of #5 and #6 fuel oil, viscous materials, raw crude oil and residual oils.

(e) 6 Watts/Square Inch

For heating #6 fuel oil, very viscous materials and fluids that do not accept heat readily.


How To Order Screw Plug Heaters

Quotation Request Form

(Please complete the fields below)

Screw-Plug Size
"B" Dimension
Immersed length
Sheath Material  
Screw-Plug Material  
Voltage (V)  
Wattage (W) High Limit Thermocouple
Thermostat Thermowell
Enclosure Type Quantity

 

 

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Telephone: 905-859-8225        Facsimile: 905-859-4691

sales@nphheaters.com

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.