Heating elements convert electrical energy into controlled heat for industrial processes — heating liquids in tanks (immersion heaters), heating air and gases in ducts (finned tubular heaters), heating metal moulds and machine components (cartridge heaters), heating extruder barrels and injection nozzles (band heaters) and heating surfaces and platens (strip heaters). DAS Company supplies the complete range of industrial heating element types for process manufacturing, machine building, HVAC and industrial maintenance applications across Europe — covering standard catalogue specifications from stock and custom-manufactured elements to customer drawings for non-standard requirements.
All heating elements supplied carry CE marking for European market installation and are manufactured to recognised international quality standards (RoHS compliant, IEC 60519-2 for electrical safety of industrial heating equipment). Material selection covers AISI 304 and 316 stainless steel for water and chemical resistance, Incoloy 800/800H for high-temperature corrosive environments, copper and brass for low-temperature water applications, and aluminised steel for cost-effective air heating — matched to the application's process fluid, temperature range and chemical compatibility requirements.
Cartridge heaters are cylindrical insertion heating elements designed for direct insertion into precision-drilled holes in metal blocks, moulds, dies and machine components — providing localised, high watt density heating at the exact location where heat is required. Construction positions a nickel-chrome resistance wire precision wound around a magnesium oxide core, inserted into a stainless or Incoloy tube with the resistance wire close to the sheath — the core is centrally positioned within the tube and filled with high-purity magnesium oxide powder. This construction delivers watt densities of up to 100 W/cm² (high-density variants) — significantly higher than tubular element designs — making cartridge heaters the only practical choice for compact moulds, plastic injection nozzles, packaging machinery seal bars and laboratory equipment heating where space is constrained.
Cartridge heater diameters cover the standard range from 6.5mm to 25mm (and metric and Imperial variants), with lengths from 25mm to 1500mm in standard catalogue ranges. Standard watt density cartridges (up to 25 W/cm²) provide reliable performance for hot runner moulds, packaging sealing bars and machine maintenance heating without aggressive thermal cycling stress. High watt density cartridges (40–100 W/cm²) provide the maximum power-per-volume for plastic injection moulding hot runners, die casting nozzles, semiconductor process equipment and laboratory test rigs — but require precise hole tolerance (typically H7 fit) and good thermal contact with the heated mass to prevent overheating failures. Temperature sensing integration — Type J or K thermocouples integrated within the cartridge or in adjacent thermowell — enables closed-loop temperature control by external PID controllers (Enda ET, Mitsubishi or Omron from DAS Company's controller portfolio). DAS Company supplies cartridge heaters in standard catalogue dimensions and custom specifications including specific lead wire length, lead wire type (silicone, fiberglass, Teflon), and terminal configuration.
Tubular heating elements are the most versatile, dependable and rugged of any heat generation device — the foundation product for liquid heating, air heating and direct surface heating across the complete industrial process spectrum. Construction uses precision wound 80-20 nickel-chrome wire to deliver even heat distribution to the element sheath, with high-purity grade A magnesium oxide as internal insulation to ensure thermal transfer and insulation resistance. Mainly available in diameter range from 6.5mm to 16mm, with various lengths and power ratings — straight, U-bend, M-bend and complex custom-bent shapes to fit specific tank, vessel and duct geometries.
Tubular elements are available in single-phase, three-phase, and spiral designs, suitable for heating water and oils, in a wide range of diameters and lengths. Made with AISI 304/316 stainless steel or Incoloy 800 sheath material, with or without thermostat and with various protection options. The selection between AISI stainless steel and Incoloy 800 sheath material is determined by the process fluid: AISI 304 for clean water and benign liquids, AISI 316 for moderate chemical exposure, and Incoloy 800/800H for corrosive environments and elevated temperatures — chemical processing, salt baths, oil and gas applications and high-purity water systems where standard stainless steel would corrode. Standard catalogue elements provide rapid delivery for common requirements; custom-manufactured tubular elements bent to customer drawings are available for specific tank, vessel and duct geometries where standard shapes do not fit the installation envelope.
Finned tubular heaters are tubular elements with steel or aluminised steel fins helically wound or stitched onto the tube surface — multiplying the surface area available for heat transfer from the element to the surrounding air. The fin surface area can be 5 to 10 times the tube surface area, enabling significantly higher heat transfer rates to air and gases than bare tubular elements at the same surface temperature. This makes finned tubular heaters the standard choice for heating gas and air in ducts, drying ovens, paint curing booths, industrial fan heaters and HVAC duct heater applications. Finned tubular heaters mounted on a frame form complete electric heating batteries — pre-assembled multi-element heating banks designed for direct insertion into ducted heating system airflow paths, supplied in any dimensions required for the application airflow cross-section and heating capacity.
Aluminised steel fins are the cost-effective standard for general air heating up to 400°C ambient — corrosion-resistant in standard industrial environments and lower cost than stainless variants. Stainless steel fins are specified for higher temperature applications (up to 750°C sheath temperature), corrosive atmosphere environments and food-contact air heating where galvanised surfaces are not acceptable. Fin spacing — typically 3, 4, 5 or 6 fins per inch — is selected based on the dust loading of the heated airflow: closely spaced fins maximise heat transfer in clean air; widely spaced fins reduce clogging in dusty industrial environments where dust accumulation between fins would block airflow and reduce heat transfer over time.
Immersion heaters heat liquids directly by submerging the heating element in the tank or vessel — providing the highest thermal efficiency of any electric heating method because there is no air gap between the heat source and the heated medium. Three mounting configurations cover the range of tank, vessel and pressure system applications. Flanged immersion heaters use bolted flange connection (ANSI, DIN or custom flange specifications) to seal the heater into pressure vessels, large tanks and pipelines — providing leak-tight connection rated for pressure applications and removable bundle access for cleaning and inspection. Screw plug immersion heaters use threaded NPT or BSP connection (1", 1¼", 1½", 2") for direct installation into threaded tank bosses and smaller vessels — the standard configuration for water heating tanks, oil reservoirs, chemical day tanks and small process vessels. Over-the-side immersion heaters hang over the rim of an open tank without through-wall penetration — the appropriate configuration for chemical bath heating, plating tanks and applications where vessel penetration is undesirable or impossible. All immersion heater configurations are available in AISI 304/316 stainless steel for water and mild chemical applications and Incoloy 800/800H for acid, alkali and oil heating at elevated temperatures. Integrated thermostats and high-limit cut-off thermostats provide protection against dry firing and process overheat — preventing element burnout when liquid level falls below the heater or process temperature exceeds safe limits.
Band heaters are cylindrical heating elements designed to clamp around the outside of pipes, drums, extruder barrels and injection moulding cylinders — providing efficient barrel heating for the plastic processing, packaging and food industries. Three principal construction types cover the temperature range required across applications. Mica band heaters use mica insulation between the resistance element and the band housing — providing reliable performance up to 480°C, the cost-effective standard for plastic extrusion and injection moulding barrel heating. Ceramic band heaters use ceramic knuckle construction enabling operation up to 750°C with significantly improved energy efficiency through reduced heat loss to ambient — the higher-performance specification for energy-conscious extrusion lines and high-temperature plastics processing. Mineral insulated (MI) band heaters provide the highest temperature capability (up to 1000°C) and the most rugged construction for severe industrial environments. Band heater dimensions are specified by the inside diameter (to match the extruder barrel or pipe), the height (along the heated cylinder length) and the wattage required for the heating duty.
Strip heaters are flat, rectangular heating elements designed for bolted attachment to flat surfaces — heating press platens, drying surfaces, freeze protection of valves and tanks, and surface-mount heating of equipment and structures. Standard strip heaters (1" × 3/8" cross-section, lengths to 1500mm) provide cost-effective surface heating for general industrial applications. Finned strip heaters feature the same highly compressed, rugged design with the addition of fins — fins increase the heat transfer surface area to allow higher wattages than standard strip heaters, intended for substantial airflow applications and typically used in heating tunnels, dryers and hot air sources. Rust resisting iron sheath provides operation to 400°C; 430 stainless steel sheath for temperatures to 650°C. Strip heaters are bolted to the heated surface using through-bolt holes in the element flanges — providing easy installation and replacement without specialised tooling.
The correct heating element specification depends on five primary factors: the heated medium (liquid, air, solid metal mass), the operating temperature (which determines sheath material and watt density limits), the available installation envelope (which determines element type and dimensional constraints), the power required (calculated from the heat-up rate and steady-state thermal losses), and the chemical compatibility between the process and the element sheath material. Common application matches: water heating tanks use screw plug or flanged immersion heaters with AISI 304 sheath and integrated thermostat; oil tank heating uses flanged immersion with AISI 316 or Incoloy 800 sheath depending on oil temperature; plastic extruder barrels use ceramic band heaters for energy-efficient operation up to 400°C process temperature; hot air duct heating uses finned tubular elements with aluminised steel fins for standard temperatures or stainless fins for elevated temperatures; injection moulding hot runner uses high watt density cartridge heaters with integrated J-thermocouple; chemical bath heating uses over-the-side immersion heaters with PTFE or Incoloy sheath for chemical resistance. DAS Company's engineering team provides element specification support for non-standard applications — confirming material compatibility, calculating required wattage and dimensioning the element to fit the installation envelope.
DAS Company provides competitive B2B pricing for heating elements across Europe. Product categories with available pricing include cartridge heaters (standard and high watt density, by diameter, length and wattage), tubular heating elements (straight and bent shapes, AISI 304/316 and Incoloy 800 sheath), finned tubular elements (with aluminised and stainless fin options), immersion heaters (flanged, screw plug and over-the-side, by tank size and process fluid), band heaters (mica and ceramic, by extruder barrel diameter and height), and strip heaters (standard and finned). Standard catalogue items are stocked in Bulgaria for fast European delivery; custom-manufactured elements to customer drawings are supplied with typical 2–4 week lead time depending on specification complexity. Contact our engineering team for application-specific selection support and project quotations.
