Heating elements
Industrial immersion heaters, manufactured to order
Immersion heaters for tanks, vessels, calorifiers and process lines — flanged, screw plug or inline, manufactured in Sharjah to your mounting, your duty and the medium being heated.
The product
What is an industrial immersion heater?
An industrial immersion heater is a bundle of tubular heating elements fixed into a mounting, which fits through the wall of a tank or vessel so the elements sit directly in the liquid. Because the heat is generated inside the fluid rather than through a vessel wall, almost all of it goes into the medium.
What separates one immersion heater from another is the mounting, not the element. The same bundle becomes a flanged heater bolted to a flanged connection, a screw plug heater threaded into a boss, or an inline circulation heater inside its own vessel with the fluid passing through. Which one you need is decided by the connection your vessel already has and by how much load it must carry.
These are not domestic water heaters. Everything here is manufactured to order for industrial, marine and building services duties — specified by voltage, wattage, immersed length, sheath material and mounting, or copied from the unit that failed.
Choosing
Which immersion heater mounting do you need?
Start from the connection your vessel already has. Changing a mounting usually means modifying the vessel, which is the expensive part of any replacement.
Flanged
— bolts to a flanged connection. Suits larger loads and bigger vessels, because the flange carries a long, heavy bundle and unbolts so the whole assembly withdraws for cleaning. The usual choice on calorifiers and storage tanks.
Screw plug
— threads into a boss. Suits smaller vessels and lighter loads, and is the usual replacement on older equipment where a threaded fitting was welded in years ago.
Inline circulation
— the heater brings its own vessel and the fluid passes through it. Suits a steady flow rather than a stored volume, and fits where there is no room for a tank.
Formed and spiral elements
— where the bundle has to work around obstructions inside the vessel, the tubular elements themselves are formed to suit.
Flanged
Screw plug
Inline circulation
Made to order
Made from the failed unit
Selection
How to specify an immersion heater
These six decisions determine whether an immersion heater lasts. They are the same questions we will ask you before quoting, whichever mounting you choose.
The medium first
— water, thermal oil, fuel oil, a glycol mix or a chemical solution. It sets the sheath material and caps how hard the element can be driven, and nothing else should override it.
Watt density
— the heat each unit of sheath area must shed. Too high for the medium and the sheath runs hot, the fluid degrades or scales onto it, and the element fails from the inside out.
Immersed length against working level
— the bundle must stay covered at the lowest level the vessel reaches. An element that is exposed when the tank draws down will fail quickly whatever it is made of.
The existing connection
— flange size, drilling and facing, or thread form and size. Matching it avoids modifying the vessel.
Fluid movement
— a heater in still liquid behaves differently from one in a circulating line. Where there is no natural circulation, the density has to come down.
Control and protection
— what switches the load, where the sensor sits, and whether an independent over-temperature cut-out is required.
Applications
Where industrial immersion heaters are used
Hot water storage and calorifiers in hotels and buildings, fuel and lubricating oil tanks on vessels and in plant rooms, process and cleaning tanks, and thermal fluid systems across Dubai and Sharjah.
A large share of the work is replacement rather than new supply. Where a unit has failed, the old one is the most reliable drawing there is — and if it failed early, we will say what we think caused it before making a copy.
Hot water storage tanks and calorifiers
Fuel oil and lubricating oil tank heating
Process, dip and cleaning tanks
Thermal fluid and glycol systems
Feed water and condensate heating
Replacement bundles for vessels whose original supplier is gone
Marine
Hotels
HVAC
Industrial plant
Offshore
Facilities
Quotation
What to send with your enquiry
A photograph of the failed unit and its nameplate answers most of this. If you are specifying from scratch, these are the details we need.
Supply voltage, phase and the load required
The mounting you have — flange size and drilling, or thread form and size
Overall and immersed length, and the depth available in the vessel
The medium being heated and its working temperature range
How the vessel is controlled, and whether a cut-out is fitted
Photographs of the failed element, the terminal box and the nameplate
FAQs
Industrial immersion heater questions
What is an industrial immersion heater?
A bundle of tubular heating elements fixed into a mounting that fits through the wall of a tank or vessel, so the elements sit directly in the liquid being heated. Because the heat is generated inside the fluid, almost all of it reaches the medium.
What is the difference between an industrial immersion heater and a domestic one?
A domestic immersion heater is a fixed-rating element for a household hot water cylinder. An industrial immersion heater is manufactured for a specific duty — voltage, wattage, immersed length, sheath material and mounting all specified for the vessel and the medium. We make the industrial kind.
Which mounting should I choose?
Match the connection your vessel already has. A flanged heater suits larger loads on a flanged connection; a screw plug heater suits smaller vessels on a threaded boss; an inline circulation heater suits a flowing line with no storage.
Do you manufacture immersion heaters, or supply them?
We manufacture them at our workshop in Al Sajaa Industrial Area, Sharjah — the elements are formed, set into the mounting and tested here. That is why a non-standard flange, thread or immersed length is straightforward.
Can you copy the one that failed?
Yes, and it is usually the fastest route. Send the old unit and we will take the mounting, the lengths and the ratings from it. If it failed early we will also say what we think caused it, because copying a wrong specification simply repeats the failure.
Why do immersion heaters fail early?
Usually the watt density was too high for the medium, the element was partly uncovered at low level, or scale and sediment built up around it and stopped heat leaving. All three cook the sheath from the outside in.
Related
Immersion heater types we manufacture
Each mounting has its own page setting out how it is built and what to send for a quotation.
Request a quote
Which mounting does your vessel have?
Or send the unit that failed and we will measure it. Workshop at Al Sajaa Industrial Area in Sharjah; we attend across Dubai and Sharjah.