Immersion Heaters
Over the Side Immersion Heaters
Over the Side Immersion Heaters
Over the side heater is designed for water tanks where it is not convenient to install a flanged or screw-plug immersion heater through the side wall. These Over the side immersion heaters offer easy installation and the ability to move the heater from water tank to tank, without having to drain the liquid. Over the side immersion heaters are ideal for applications where scale or sludge build-up on the heater sheath is an issue and the heater should be removed periodically for cleaning. Over-the-side immersion heater is installed from the top and is available in two versions; units that have the heated section at the bottom of a tank (Type OTSL & OTSR) or along the side wall (Type OTSH).
Contact Bucan to buy Over The Side Heaters in Canada.
- Applications
- Selection
- Accessories
- Tips
- Optional Features
Typical Heating Applications of Over the Side Immersion Heaters and Water Tank Immersion Heater:-
- Hydraulic Oils
- Alkaline Cleaning Solutions
- Oils, Including Light to Heavy
- Water & Water Based Solutions
- De-mineralized or De-ionized Water
- Solutions that Precipitate, such as Phosphates
- Tall storage tanks with a top opening as the only installation option
Bottom-of-the Water Tank Immersion Heater
Two designs are available
- Type OTSL “L” shaped heaters for rectangular tanks
- Type OTSR, circular heaters for round tanks or for applications where the heater will be
installed through a manhole cover
The basic construction includes rugged tubular elements that are welded or brazed into a lower terminal box. The power wires come up through a non-heated vertical riser pipe into a moisture-resistant (NEMA 4) terminal box. The tubular elements are mounted in multiples of 3 for a balanced 3-phase load. Heater banks can be added for higher kilowatt output. Sheath material selection (Steel, Copper, Incoloy, Stainless Steel, or other special alloys) is based on design parameters.
Bucan technical staff will help you select the optimum watt density and sheath material to suit your specific needs.
“L” Shape
For rectangular tanks 40-50 watts/in2
| KW | “B” Dim. (in) | Copper Sheath | Stainless Steel Sheath | Incoloy Sheath |
|---|---|---|---|---|
| 3 | 12 | OTSLC30312 | OTSLS30312 | OTSLI30312 |
| 6 | 22 | OTSLC30622 | OTSL30622 | OTSLI30622 |
| 9 | 30 | OTSLC30930 | OTSL30930 | OTSLI30930 |
| 12 | 38 | OTSLC31238 | OTSL31238 | OTSLI31238 |
| 15 | 46 | OTSLC31546 | OTSL31546 | OTSLI31546 |
| 18 | 53 | OTSLC31853 | OTSL31853 | OTSLI31853 |
“L” Shape
For rectangular tanks 20-25 watts/in2
| KW | “B” Dim. (in) | Steel Sheath | Incoloy Sheath |
|---|---|---|---|
| 1.5 | 12 | OTSLF301512 | OTSLI301512 |
| 3.0 | 22 | OTSLF30322 | OTSLI30322 |
| 4.5 | 30 | OTSLF304530 | OTSLI304530 |
| 6 | 38 | OTSLF30638 | OTSLI30638 |
| 7.5 | 46 | OTSLF307546 | OTSLI307546 |
| 9 | 53 | OTSLF30953 | OTSLI30953 |
Circular Shape
For round tanks or openings 40-50 watts/in2
| KW | “B” Dim. (in) | Copper Sheath | Stainless Steel Sheath | Incoloy Sheath |
|---|---|---|---|---|
| 3 | 9.75 | OTSRC30309 | OTSRS30309 | OTSRI30309 |
| 6 | 13 | OTSRC30613 | OTSRS30613 | OTSRI30613 |
| 9 | 15.5 | OTSRC30915 | OTSRS30915 | OTSRI30915 |
| 12 | 18 | OTSRC31218 | OTSRS31218 | OTSRI31218 |
| 15 | 20.5 | OTSRC31520 | OTSRS31520 | OTSRI31520 |
| 18 | 23.75 | OTSRC31823 | OTSRS31823 | OTSRI31823 |
Circular Shape
For round tanks or openings 20-25 watts/in2
| KW | “B” Dim. (in) | Steel Sheath | Incoloy Sheath |
|---|---|---|---|
| 1.5 | 9.75 | OTSRF301509 | OTSRI301509 |
| 3.0 | 13 | OTSRF30313 | OTSRI30313 |
| 4.5 | 15.5 | OTSRF304515 | OTSRI304515 |
| 6 | 18 | OTSRF30618 | OTSRI30618 |
| 7.5 | 20.5 | OTSRF307520 | OTSRI307520 |
| 9 | 23.75 | OTSRF30923 | OTSRI30923 |
Side-wall heaters (Single Phase)
Type OTSH Over-the-side heaters have a rectangular form and are made for open tank applications. These heaters are lightweight, thin-profiled, and designed to hang on the tank wall in order to save space. Weather/moisture-proof (NEMA 4) terminal boxes are standard. These heaters can be made with a single element (single-phase) or with three elements (three-phase). Different sheath materials are available.
| KW | Watt Density | Sheath Material | ||||
|---|---|---|---|---|---|---|
| Incoloy® | Inconel® | Stainless Steel | Titanium | Weight (lb) | ||
| 3 | 18 | OTSHI03 | OTSHN03 | OTSHS03 | OTSHT03 | 9 |
| 5 | 30 | OTSHI05 | OTSHN05 | OTSHN05 | OTSHT05 | 9 |
| 7.5 | 45 | OTSHI07 | OTSHN075 | OTSHN075 | OTSHT075 | 9 |
Side-wall heaters (Three Phase)
Specialy designed to hang on the tank lip. 3 elements single or 3 phase. Specify voltage and phase when ordering.
| KW | Watt Density | Sheath Material | ||||
|---|---|---|---|---|---|---|
| Incoloy® | Inconel® | Stainless Steel | Titanium | Weight (lb) | ||
| 9 | 18 | OTSHI09R | OTSHN09R | OTSHS09R | OTSHT09R | 9 |
| 15 | 30 | OTSHI15R | OTSHN15R | OTSHN15R | OTSHT15R | 9 |
| 22.5 | 45 | OTSHI1225R | OTSHN1225R | OTSHN1225R | OTSHT1225R | 9 |
Accessories of Over the Side Immersion Heaters
- Vertical riser can be made in any height
- Hazardous Location (NEMA 7) terminal enclosures
- Passivation – when required
- Special fitting for closed top
- Built-in thermostats, thermocouples, and high-limit thermocouples
Installation and Maintenance Tips for Over The Side Water Tank Immersion Heater
- Over The Side Immersion Heaters must be installed by qualified personnel in accordance with all national and local electric codes.
- The supply of electric power should match the nameplate voltage and wattage.
- The heated section of the heater should be fully immersed in the liquid when the heater is energized.
- Sludge build-up on the element sheath may damage the heater; special legs should be installed to keep the heater above the tank bottom, and the heater should be periodically inspected and cleaned if necessary.
- The standard terminal box is weather/moistureproof (NEMA 4). Periodically, the electrical connections should be inspected for tightness and the interior of the terminal box checked to make sure that it is clean.
Contact Bucan for Over The Side Heaters in Canada.
Features of Over The Side Immersion Heater
- Special sheath materials – selected to suit the liquid or gas being heated
- Special flange on the riser for gas heating applications
- Vertical riser made at any height
- Sludge legs, to raise over the side immersion heater elements above the tank bottom
- Hazardous location (NEMA 7) terminal enclosures
- Passivation – when required
- Special fittings for closed top
- Built-in thermostats, thermocouples, and/or high-limit thermocouples
FAQs
How do over-the-side immersion heaters differ from screw plug heaters?
Over the side heaters do not require a mating fitting to install.
What industries commonly use over-the-side immersion heaters?
Over the side is used in many industries, but tank heating is very prevalent.
Can over-the-side immersion heaters be mounted at an angle?
Over the side allows the heater to be installed with any custom mount.
Are over-the-side immersion heaters suitable for portable tanks?
Over the side heaters can be moved with a portable tank as long as the power supply is available.
Can over-the-side heaters be used in flammable liquids?
We do have options for Flammable liquids. Please consult a designer.
