An Over The Side Immersion Heater is a type of industrial electric heater designed to be mounted over the side of a tank or vessel, with the heating elements immersed directly into the liquid. Unlike flange or screw plug heaters, these units do not require any special tank openings, which makes them easy to install, remove, and maintain. They are commonly used for heating liquids such as water, oil, chemicals, and plating solutions in both industrial and commercial settings.
The versatility and efficiency of Over The Side Immersion Heaters make them one of the most widely used solutions for process heating. They can be custom-designed to suit specific tank sizes, temperature ranges, and chemical environments, offering a flexible and cost-effective heating method for various applications.
Over The Side Immersion Heaters are used across numerous industries due to their adaptability and energy efficiency. Below are the primary application areas where they are most effective.
In chemical plants, temperature control is critical for maintaining chemical stability and ensuring safe reactions. Over The Side Immersion Heaters are widely used in chemical baths and process tanks where corrosive or viscous fluids are handled. The heaters are often constructed using materials like stainless steel, titanium, or Incoloy to resist corrosion and chemical damage.
Metal finishing processes, such as electroplating, anodizing, and galvanizing, require precise temperature regulation to ensure coating quality and consistency. Over The Side Immersion Heaters are ideal for these operations because they can be easily removed for tank cleaning or solution replacement without disturbing other equipment.
In plating tanks, stainless steel or titanium heaters are commonly used depending on the chemical composition of the bath. They provide even heat distribution, which helps maintain uniform metal deposition and surface finish.
In water treatment and wastewater management facilities, Over The Side Immersion Heaters are used to maintain water temperature during filtration, clarification, and evaporation processes. They help prevent freezing in outdoor tanks and enhance the performance of biological treatment systems.
For wastewater containing oils or sludge, maintaining an elevated temperature improves viscosity and flow, making the treatment process more efficient. These heaters are often used in conjunction with thermostatic controls to ensure stable and safe operation.
In refineries and lubricant manufacturing facilities, viscosity control is essential. Over The Side Immersion Heaters are employed to heat oils, greases, and hydraulic fluids to reduce viscosity, improve pumpability, and facilitate transfer or blending operations.
The food and beverage industry relies on sanitary heating solutions that meet strict hygiene standards. Over The Side Immersion Heaters with stainless steel sheaths are used in wash-down tanks, food processing vats, and sterilization systems. They maintain precise temperature control for processes such as:
The popularity of Over The Side Immersion Heaters comes from their many practical advantages. Their ease of installation, versatility, and durability make them suitable for a wide variety of heating applications. Below is a summary of their major benefits.
| Benefit | Description |
| Easy Installation | Simply hang the heater over the tank wall without drilling or welding. |
| High Efficiency | Direct immersion in liquid minimizes heat loss and maximizes energy efficiency. |
| Portability | Can be easily removed or transferred to another tank when needed. |
| Customizable Design | Can be built with various materials, shapes, and wattages to suit the liquid type and environment. |
| Low Maintenance | Minimal mechanical wear and easy cleaning extend service life. |
Selecting the right heater involves evaluating several technical and environmental factors. A well-chosen heater ensures both efficiency and safety in long-term use.
The choice of sheath material depends on the liquid being heated. For example, stainless steel is ideal for water and mild chemicals, while titanium or Incoloy is better for corrosive environments. Choosing the wrong material may lead to corrosion or premature failure.
Different fluids require specific watt densities to prevent overheating or carbonization. High-viscosity fluids like oil require lower watt densities to ensure uniform heating. The desired temperature range also determines the power rating and control options of the heater.
The shape and size of the tank influence the design of the heating elements. Over The Side Heaters can be configured in L-shaped, U-shaped, or O-shaped designs to provide even heat distribution without occupying much space inside the tank.
Over The Side Immersion Heaters are versatile and reliable heating solutions used in a wide range of industries — from chemical processing and metal finishing to food production and wastewater treatment. Their simple installation, efficient heat transfer, and material flexibility make them ideal for applications where precision, durability, and ease of maintenance are required. By selecting the right material, watt density, and design, users can ensure long-term, efficient heating performance in virtually any liquid heating process.
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