Circulation Heaters, also known as “in line heaters,” have uses in many applications. They can use steel, stainless steel, or titanium depending on the application.
Lube oil and waste oil applications often use steel for circulation heaters. This is because it is fairly inexpensive compared to stainless steel counterpart.
Water circulation heaters use stainless steel because of its anti-corrosive qualities. In both applications, a pump flows the liquid, such as water or glycerol, through a closed pipe circuit. The liquid is reheated as it flows through the circulation heater.
A major consideration for this application is viscosity. Electric circulation heaters generate heat, making the medium more viscous. The more viscous the fluid, the easier it is to pump through a circuit of pipes.
Industrial circulation heaters come in a range of watt densities. Watt densities are specifically designed for the medium they will heat. The required wattage to heat the oil or water is highly correlated to the flow rate (in GPM).
Insulation is often required for vessels to preserve the heat within the vessel. This results in efficient heat application, reducing unnecessary costs through heat loss.
Electric circulation heaters can use digital thermocouple probes or RTDs. This allows them to maintain the oil or water at the preferred temperature. Many applications use liquids with low flash point. These require explosion-proof housing (NEMA 7) to avoid potential mishaps.
Other useful features found with electric circulation heaters are drain valves. They are easy to install
in any location on the vessel, allowing for easy maintenance of the heater.
The water or oil can be purged through the drain valve allowing for maintenance on the heating elements. Calcium deposits and other residues can build up on heating elements. These require cleaning several times a month.
Circulation heaters also come with horizontal or vertical mounting, depending on your application. Skid mounted vessels are used in oil heating industries that require mobility.
WATTCO™ electric heaters are also available in different terminal boxes. These include moisture resistant or explosion proof terminal boxes for hazardous environments.
WATTCO™ circulation heaters are an exceptional choice for heating process liquids. They use materials that are resistant when heating corrosive mediums.
Circulation heaters are also used when heating closed loop systems. These can require high temperatures of up to 1000℉. These applications use large flange heating vessels that contain the gas and heating it efficiently. It requires low maintenance and provides excellent heat transfer.
Oil and Gas companies use circulation heaters in heating oils. Electric heaters assist them in modifying the viscosity levels of their heating oils. Crude oil enters an inlet of the vessel at a cool temperature. The circulation heater reheats the oil. The oil then exits the outlet at a temperature more convenient for flow as it travels from one end of the transport pipe to the other.
Hydraulic fluid can also be heated using this electric heater for heat transfer purposes. It also provides freeze protection in cooler climates. This is crucial because winter temperatures can damage the fluid.
Immersion heaters are widely used in a variety of industries. Particularly the oil and pipeline sector for several different purposes. These industrial heaters are specifically designed so that oil, water, viscous materials, gases, solvents and other different process mixtures can be heated in direct contact with each other. This allows the heat to be generated within a single enclosure or solution, and so hundred percent efficiency can be achieved.
Circulation heaters are also used when heating closed loop systems. These can require high temperatures of up to 1000℉. These applications use large flange heating vessels that contain the gas and heating it efficiently. It requires low maintenance and provides excellent heattransfer.
2 INCH UP TO 42 INCH
ANSI Flange Rating
150 LBS, 300 LBS or 600 LBS ANSI Non Standard Flanges also available
Steel, Stainless Steel, Copper, Titanium, Incoloy, Inconel
Thermostatically controlled (0-255F), (55-550F) Digitally Controlled, Thermocouple, RTD
Terminal Box Housing
NEMA 1 Standard Terminal Box, NEMA 4/4X Water Proof Terminal Box NEMA 7 Explosion Proof Terminal Box
|Wattage, Voltage Phase||The removable flanged heater can be made of virtually any power and voltage requirements|
|Circuits||Any specified by user|
|Flange and Vessel||3 inch, 4 inch, 5 inch, 6 inch, 8 inch, 10 inch 12 inch, 14 inch up to 43 inch flanges of any material type required|
|Flange and Vessel material||Carbon steel, carbon steel galvanized, 304 stainless steel, 316 stainless steel, incoloy, inconel, titanium|
|Flange Rating||Class 150, class 300 or any specified|
|Wearing Watt density||6.5 W/In2 15 W/In2 23 W/In2 45 W/In2 65W/In2 or any other|
|Sheath material||Steel, Copper, 304 Stainless Steel, 316 Stainless steel, Incoloy|
|Terminal seals||silicone resin, silcone fluid, RTV, epoxy, hermetic or any other|
|Terminal enclosure||NEMA 1 General purpose, NEMA 4 moisture resistant, NEMA 7 Explosion proof|
|Terminal Enclosure Standoffs||4 inch, 6 inch or any other|
|Flange Gasket||Standard, Spiral wound or any other|
|ASME Designed||if needed|
|Thermal Insulation||Standard, High Temperature or weatherproof jacket available|
|Mounting position||Horizontal or vertical|
|Lifting lugs||If required|
|Circulation Heater Applications||SHEATH MATERIAL||FLANGE MATERIAL|
|Clean water, Freeze protection, hot water storage, Boiler and water heaters, cooling towers, Solutions not corrosive to copper||Copper||Steel|
|Hot water, steam boilers, mildly corrosive solutions (in rince tanks, spray washers)||Incoloy||Steel|
|Oils, inline gas heating, Mildly corrosive liquids, stagnant or heavy oils, high temperature, low flow gas heating||Steel||Steel|
|Process water, soap and detergent solutions, Soluble cutting oils, demineralized or deionized water||Stainless Steel||Stainless Steel|
|Mildly corrosive solutions||Stainless Steel||Stainless Steel|
|Severe corrosive solutions, demineralized water||Incoloy||Stainless Steel|
|Light Oil, Medium Oil||Steel||Steel|
|Food Equipment||Incoloy||Stainless Steel|
| Standard sizes: 1.25” NPT Screw Plug size to 14” diameter
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