 OVERVIEW
Screw Plug heaters from WATTCO™ are comprised of hairpin tubular elements that are brazed or welded into a machined pipe thread fitting, which are then screwed directly through a threaded coupling in the tank wall or vessel, or installed in pipe.
Screw Plug heaters from WATTCO™ are used for heating gases and liquids in tanks or vessels. These elements are designed to be fully immersed in liquid so that heat transfer will occur at a rapid rate, enabling quick heat up times.
KEY FEATURES
• NPT screw plugs: 1”, 1 ¼”, 1 ½”, 2”, 2 ½”, 3” and 4’’
• Stainless Steel, Brass or Steel Screw plugs
• 0.260”, 0.315”, 0.375”, 0.430” and 0.475” diameters available
• Sheath materials:
o Copper
o Steel
o Incoloy®
o Inconel®
o Stainless steel
o Titanium
• Broad range of standard and custom designs in different sizes, wattage, materials,
junction box types, terminal housings and thermostats (including built-in thermostats)
• Available explosion and/or moisture resistant terminal enclosures upon request.
• CSA, CSA US and UL approved
• NEMA 1, 4, 4x, 7 terminal boxes are available
BENEFITS
• Energy efficient
• Easy to regulate
• Easy to install or remove
• Easy to maintain
• Built solidly
• Custom-designed
• Compact
• Designed and built for safety
• CSA™ and UL approved
FACTORS TO BE CONSIDERED
• Please consider the following factors in order to select the proper screw plug heater:
• Desired operating temperature
• Custom designed voltages available
• Ambient temperature
• Vessel insulation
• Heating element watt density
• Available length within your tank
• Sheath material (corrosive or non corrosive)
o Temperature of the liquid
o Degree of aeration of exposed liquid
o Velocity of the liquid
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