SCREWPLUG HEATERS immersion heaters WATTCO™ screwplug heaters 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. WATTCO™ screwplug heaters are used for heating gases and liquids in tanks or vessels. It is strongly advised, for safety and reliability reasons, to immerse the heated section of the elements in the liquid, which will then be heated through natural convection currents that the elements create. WATTCO™ SCREWPLUG HEATER KEY...

SCREWPLUG HEATERS immersion heaters Please consider the following factors in order to select the proper screwplug heater: To transfer heat with a screwplug immersion heater, consideration should be given to the following: »» To determine the proper heat transfer from the elements to the liquids. »» Special care should be given to viscous materials (ie. Molasses, Asphalt, Oil etc…). »» Determination of various factors should be made prior to ordering the immersion heaters, to avoid overheating and carbonization of the materials being heated. Desired operating temperature Ambient temperature Vessel...

SCREWPLUG HEATERS immersion heaters 1” NPT SCREWPLUG HEATERS (1 ELEMENT) Refer to PAGE 3 for the GENERAL RECOMMENDATIONS TABLE 1 1” NPT Screwplug Heaters (1 element) STANDARD VOLTAGES 1 PHASE ONLY HIGH DENSITY - COPPER SHEATH / BRASS PLUG 0.5 WHEN ORDERING, PLEASE SPECIFY: Quantity, catalogue number, voltage, phase, wattage, material to be heated, flowing or static mediums, types of controls to be applied, type of metal or alloy of the container, any extra features. 1 1/4” NPT SCREWPLUG HEATERS (2 ELEMENTS) Refer to PAGE 3 for the GENERAL RECOMMENDATIONS TABLE 2 1 1/4” NPT Screwplug Heaters (2...

SCREWPLUG HEATERS immersion heaters 2” NPT SCREWPLUG HEATERS (2 ELEMENTS)... Refer to PAGE 3 for the GENERAL RECOMMENDATIONS TABLE 3 2” NPT Screwplug Heaters (2 elements) STANDARD VOLTAGES 1 PHASE ONLY HIGH DENSITY - COPPER SHEATH / BRASS PLUG 1.5 HIGH DENSITY - INCOLOY SHEATH / STAINLESS PLUG 1.5 MEDIUM DENSITY - INCOLOY SHEATH / STEEL PLUG 1.5 MEDIUM DENSITY - INCOLOY SHEATH / STAINLESS PLUG 1.5 WHEN ORDERING, PLEASE SPECIFY: Quantity, catalogue number, voltage, phase, wattage, material to be heated, flowing or static mediums, types of controls to be applied, type of metal or alloy of the container,...

SCREWPLUG HEATERS immersion heaters 2” NPT SCREWPLUG HEATERS (2 ELEMENTS)... Refer to PAGE 3 for the GENERAL RECOMMENDATIONS TABLE 3 2” NPT Screwplug Heaters (2 elements) STANDARD VOLTAGES 1 PHASE ONLY LOW DENSITY - INCOLOY SHEATH / STEEL PLUG 1.0 LOW DENSITY - INCOLOY SHEATH / STAINLESS PLUG 1.0 2” NPT SCREWPLUG HEATERS (3 ELEMENTS)... Refer to PAGE 3 for the GENERAL RECOMMENDATIONS TABLE 4 2” NPT Screwplug Heaters (3 elements) STANDARD VOLTAGES 1 PHASE ONLY HIGH DENSITY - COPPER SHEATH / BRASS PLUG 3.0 MEDIUM DENSITY - INCOLOY SHEATH / STEEL PLUG 3.0 LOW DENSITY - INCOLOY SHEATH / STEEL PLUG...

SCREWPLUG HEATERS immersion heaters 2 1/2” NPT SCREWPLUG HEATERS (3 ELEMENTS)... Refer to PAGE 3 for the GENERAL RECOMMENDATIONS TABLE 5 2 1/2” NPT Screwplug Heaters (3 elements) STANDARD VOLTAGES 1 PHASE ONLY HIGH DENSITY - COPPER SHEATH / BRASS PLUG 3.0 HIGH DENSITY - INCOLOY SHEATH / STAINLESS PLUG 3.0 MEDIUM DENSITY - INCOLOY SHEATH / STEEL PLUG 3.0 MEDIUM DENSITY - INCOLOY SHEATH / STAINLESS PLUG 3.0 WHEN ORDERING, PLEASE SPECIFY: Quantity, catalogue number, voltage, phase, wattage, material to be heated, flowing or static mediums, types of controls to be applied, type of metal or alloy...

SCREWPLUG HEATERS immersion heaters 2 1/2” NPT SCREWPLUG HEATERS (3 ELEMENTS)... Refer to PAGE 3 for the GENERAL RECOMMENDATIONS TABLE 5 2 1/2” NPT Screwplug Heaters (3 elements) STANDARD VOLTAGES 1 PHASE ONLY LOW DENSITY - INCOLOY SHEATH / STEEL PLUG 3.0 LOW DENSITY - INCOLOY SHEATH / STAINLESS PLUG 3.0 WHEN ORDERING, PLEASE SPECIFY: Quantity, catalogue number, voltage, phase, wattage, material to be heated, flowing or static mediums, types of controls to be applied, type of metal or alloy of the container, any extra features.

SCREWPLUG HEATERS immersion heaters EXTRA FEATURES WATTCO™ screwplug heaters are custom-built and supplied with voltages up to 600V. WATTCO™ screwplug heaters come with standard wattage. If you need to replace your current heater with other wattages, simply select the appropriate WATTCO™ unit. WATTCO™ immersed length of heaters: 180” Use internal vessel support if immersed length exceeds 50” EXTRA HEAVY WALL SHEATH Heavy wall sheath (0.049” or 0.065” thickness) is provided in: » Incoloy® » Steel » Inconel® » Stainless steel Available Incoloy® and stainless steel sheathed heaters can be supplied...

SCREWPLUG HEATERS immersion heaters TERMINAL HOUSING DESCRIPTION Standard housing without thermostat Standard thermostat housing (1 pole) Special thermostat housing Moisture resistant housing without thermostat Moisture resistant housing Explosion-proof housing with 1 pole thermostat or without thermostat Explosion-proof housing with 2 pole thermostat SHOWN WITH OPTIONAL EXTERNALLY ADJUSTABLE THERMOSTAT

SCREWPLUG HEATERS immersion heaters DOMESTIC IMMERSION HEATERS WATTCO™ domestic immersion heaters are outlined in this section. These heaters are first-class quality replacement solutions for all heater applications. APPLICATIONS »» For domestic and small industrial applications »» Select tin or zinc plated element if you use an old style resistor type element. Plating decreases galvanic current and prevents corrosion within the tank while increasing the service life of the heater and tank. TABLE 1 WATTCO™ Domestic Immersion Heaters CATALOG NUMBER INVENTORY: THESE HEATERS ARE NORMALLY STOCKED...