Circulation Heaters
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Catalog excerpts

Circulation Heaters & Circulation Heaters

Circulation HeatersHYDROSAFE® Heat Exchanger HYDROSAFE®, Watlow’s indirect electric heat exchanger for dry gas seal applications, has been designed as a standardized thermal solution that minimizes custom engineering requirements because it can be adapted to a variety of conditions. The HYDROSAFE provides very flexible heating capabilities (12 to 31.2kW) to compensate for changes in gas flow rates, or changes in gas composition, when interconnected to our purpose engineered WATCONNECT® control panel. Multiple units may be connected in series for higher kW needs. The HYDROSAFE holds complete...

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Circulation Heaters & Heater Assembly Specifications

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Circulation Heaters & Circulation Heaters & HYDROSAFE Heat ExchangerHeater Assembly Specifications (Continued)Specifications Design temperature • -58 to 572°F (-50 to +300°C) Design pressure • Up to 6800 psi (469 bar) Weight (empty) maximum • 300 lbs (136kg) Inlet temperature • User specified Outlet temperature • Max. 450°F (232°C) Working pressure • User specified Flow rate • User specified Maximum back pressure • User specified Maximum ambient temperature • 122°F (50°C) for North American certifications, 176°F (80°C) for IEC and ATEX certifications Media type • Liquid or gas Media •...

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Circulation Heaters & Ordering Information Part Number

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Circulation Heaters STARFLOW™ Heaters The STARFLOW™ circulation heater is engineered to heat a flowing gas stream to 1000°F (537°C). The 316L stainless steel chamber houses a small diameter sheathed element, which allows for quick response to both heat-up and cool down cycles. Watlow’s starwound, coiled cable heater provides extremely efficient and reliable heating by maximizing the contact area of the gas or fluid with the element. Because the element is sheathed, the unit can operate in gas streams requiring a clean environment as well as atmospheres containing contaminants and moisture....

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Circulation Heaters STARFLOW Heaters 10 in. (254 mm) 9.25 in. (235 mm) ø.3.5 in. (89 mm) Inlet Tube Outlet Tube Heater Adapter Exit O-Ring Groove Ordering Information Part Number ② Heater Wattage ⑪ Internal T/C Calibration (Heater) ⑫ Surface Finish of Assembly and Heater ⑬ Process T/C Calibration (Assembly) ③ ④ Type of Inlet ET = 1/4 in. (6 mm) O.D. tube JT = 1/2 in. (13 mm) O.D. tube Surface Finish of Assembly and Heater Unfinished Electropolished Type of Outlet ⑤ ⑥ ET = 1/4 in. (6 mm) O.D. tube JT = 1/2 in. (13 mm) O.D. tube Process Thermocouple Calibration (Assembly) Type J Type K...

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Circulation HeatersWATROD™ and FIREBAR® Circulation Heaters Circulation heaters provide a ready-made means to install electric heating with a minimal amount of time and labor. This is accomplished by combining heating elements, vessel, insulation, terminal enclosure, mounting brackets and inlet and outlet connections into a complete assembly. Made from NPT screw plug or ANSI flange heater assemblies mated with a pressure vessel (tank), circulation heaters are designed to heat forced-circulation air, gases or liquids. Ideal for either in-line or side-arm operations, these assemblies direct...

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Circulation Heaters WATROD and FIREBAR Circulation Heaters Features and Benefits (Continued) All catalog units rated to ANSI pressure Class 150 • Provides pressure vessels (tanks) that are either carbon or 316 stainless steel Standard offering includes units rated for up to and including ANSI pressure class (application review required) • Provides pressure vessels (tanks) available in carbon steel, 304 or 316 stainless steel materials • Includes schedule 40, standard and 80 pipe used in the pressure vessel construction Catalog units provided with NPT or ANSI Class 150 nozzle connection •...

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Circulation HeatersWATROD and FIREBAR Circulation Heaters Options (Continued) Terminal Enclosures General purpose terminal enclosures, without thermostats, are supplied on all Watlow circulation heaters. Moisture and explosion resistant ratings are available to meet specific application needs. For screw plug terminal enclosures, refer to page 151. For flange terminal enclosures, refer to page 226. Thermostats To provide process temperature control, Watlow offers optional single- and double-pole thermostats. Thermostats are typically mounted in the terminal enclosure. See Screw Plug...

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Circulation HeatersWATROD and FIREBAR Circulation Heaters Options (Continued) Sheath Materials The following sheath materials are available on WATROD and FIREBAR heating elements: Standard Sheath Materials Made-to-Order Sheath Materials 304 SS Alloy 600 Titanium Hastelloy C276 Inconel®/Steel Monel® Wattages and Voltages Watlow routinely supplies circulation heaters with 120 to 690VAC as well as wattages from 500 watts to one megawatt. If required, Watlow will configure circulation heaters with voltages and wattages outside these parameters. For more information on special voltage and...

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Circulation Heaters WATROD and FIREBAR Circulation Heaters Technical Data Maximum Velocities The rate at which a gas or liquid flows through inlet and outlet pipes is critical to maintaining the desired output temperature. Pressure drop through the circulation heater must be considered to properly size blowers or pumps. The Maximum Velocity to Avoid Excessive Pressure Drop chart gives recommended maximum velocities, in feet per second and meters per second of gas or liquid being heated and nominal pipe size. Maximum Velocity to Avoid Excessive Pressure Drop Vessel Orientation Guidelines...

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Circulation HeatersExtended Capabilities for WATROD and FIREBAR Circulation HeatersPerformance Capabilities • Up to 3000psi design pressure Features and Benefits Offering includes units rated above ANSI pressure class 300 • Pressure vessel tanks are available in 304 and 316 “H” series stainless steel, Alloy 600, Alloy 800, Chrome Moly, Monel®, Duplex and 321 stainless steel. Options Exotic Sheath Materials Contact your Watlow representative for details and availability. Pressure Vessels Made-to-order units can be made in a variety of materials, flange sizes and pressure classes. To order,...

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