Products >

Cartridge Heaters

Cartridge-Heaters

Precision Heating for Industrial Applications

Calgen Cartridge Heaters, available in both High-Density (HWD) and Low-Density (LWD) types, are engineered to deliver efficient and precise heating solutions for a wide range of industrial applications including dies, platens, molds, core heating, and more. Designed with advanced materials and construction, these heaters offer excellent thermal transfer, long service life, and reliable performance even under demanding conditions.

High-Density Cartridge Heaters (HWD)

Application : High-density cartridge heaters are ideal for applications requiring intense and localized heating in compact spaces. Common uses include:

Packaging, sealing, and marking machines
Mold and die heating
Medical and laboratory equipment
Immersion heating
R&D and specialized industrial applications

Key Features and Benefits

High watt density for maximum heat output
Operates efficiently in vibration-prone environments
Withstands temperatures up to 1000°C
Compact design enables heating in limited space
Sheaths available in Type 316 stainless steel
Welded end disc for durability (3/8″ and above)
Thermocouple integration for accurate temperature control

Construction Details:

The resistance wire is tightly wound around a high-temperature refractory core, enclosed in a stainless steel sheath, and compacted with magnesium oxide to maximize heat transfer and durability. These heaters are ground to -0.001″ for optimal fit in reamed holes.

Low-Density Cartridge Heaters (LWD)

Application : Designed for gentle and even heating, low-density cartridge heaters are best suited for:

Dies and platens
Core heating
Applications requiring moderate heat without risking material damage

Key Features and Benefits

Lower surface temperature
Uniform heat distribution
Suitable for applications where overheating must be avoided
Made with insulated windings to reduce heat concentration

Construction Details:

Resistance wire is wound around ceramic insulators and inserted into metal tubes filled with magnesium oxide but not compacted like HWD heaters. This results in softer heat suitable for sensitive applications.

Technical Specifications:

Surface Ratings: Up to 100 W/in² (HWD)

Sheath Temperature: Max 600°C (Stainless steel), 300°C (Brass)

Voltage Options: 12V, 42V, 110–125V, 220–250V

Diameters Available: 1/4″, 5/16″, 3/8″, 1/2″, 5/8″ and metric sizes

Lengths: 1/4″ & 5/16″: 1″ to 4″

3/8″, 1/2″, 5/8″: 2.25″ to 12″+ depending on wattage

Installation & Operation Guidelines
Mounting: Insert into precision-drilled holes for tight thermal contact

Insulation: Proper external insulation enhances heating efficiency

Temperature Control: Use PID controllers and thermocouples for accurate regulation

Material Compatibility: Stainless steel sheath offers resistance to corrosion and high heat

Orientation: Suitable for both horizontal and vertical mounting

Safety & Maintenance Tips

Use thermal cutoffs or alarms to avoid overheating
Ensure proper electrical connections and insulation
Regularly inspect and clean the heater and its surroundings
Monitor for wear, corrosion, or damage to maintain performance

Why Choose Calgen by India Heaters?

With decades of expertise in industrial heating technology, Calgen by India Heaters ensures unmatched reliability, high thermal performance, and compatibility with a wide range of machinery and processes. Whether you need focused high heat or gentle temperature control, our cartridge heaters are designed to meet your exact operational requirements.

HWD Cartridge Heaters with standard dia and length

L	6mmD	8mmD	10mmD	16mmD	1/4"D	3/8"D	1/2"D	5/8"D	3/4"D

40	-	100	100	200	-	100	150	200	-
50	100	100	200	200	100	200	200	200	-
60	100	150	200	200	-	200	-	200	-
70	-	200		-	-	-	-	-	-
75	150	200	250	300	200	250	300	300	-
80	-	200	250	-	-	250	-	-	-
90	-	250	300	-	-	300	350	-	-
100	300	250	400	600	300	400	400	600	-
110	-	250	300	-	-	300	400	-	-
120	-	250	500	-	-	500	450	-	-
125	400	350	500	750	-	500	500	750	-
130	-	300	-	-	-	-	-	-	-
140	-	300	500	-	-	500	500	-	-
150	-	350	600	1000	-	600	600	1000	1000
160	-	-	550	-	-	550	600	-	-
175	-	-	600	-	-	600	700	-	-
200	-	-	700	1200	-	700	800	1200	1500
225	-	-	800	-	-	800	900	-
250	-	-	800	1500	-	800	1000	1500	2000
275	-	-	-	-	-	-	-	-	-
300	-	-	-	-	-	-	1500	-	-