Industrial Electric Heating Solutions | CE Certified, OEM&ODM

Cartridge Heater with Fiberglass Wire


Manufacturing Performance and Tolerance Requirements

Power   (W) +5%, -10%
Resistance (Ω ) +10%, -5%
Insulation (Cold   500V DC)≥5M Ω
Leakage Current   (Cold at 253V)≤0.5mA
Shell MaterialSS304, SS310S, NCF800
Shell (304) Max   Temp.540℃ / 994℉
Shell (310S) /   NCF800 Max Temp.850℃ / 1564℉
Length Tolerance±1.5%
Unheated at The   Bottom3-11mm
Unheated at The Head4-15mm
Diameter (mm)3456.581012.516201532
Diameter   (inch)1/8"3/16“1/4"3/8”1/2“5/8”3/4"1"1 1/4"
High Voltage800800125012501500150015001500150015001500
Max. Voltage   (V)120240240415480480480480480480480
Min. Length   (mm)1515152020202525303040
Max. Length   (mm)10010020015001500150015001500150015001500
Max. W/cm²   & W/inch²60W/cm², 387W/inch²

Technical Specification

Sheath MaterialSS304/321/310S/Incoloy800/840
Resistance Heating WireCr20Ni80
Leads Material

Fiberglass (180°C)

Teflon (260°C)

Pure Nickel (400°C)

Power Tolerance±10%
Maximum Sheath   Temperature750°C/1380°F
Insulation Resistance5MQ, 500V (DC)
Length Tolerance±1.5%, minimum ±1 mm
Diameter Range3mm ~ 25.4mm
Diameter Tolerance-0.02 ~ -0.06 (if not specified)
Maximum Voltage480V
High Voltage Ttest1500V
Maximum Surface Load25W/cm²
ThermocoupleType J or Type K


Food processing

Glue guns

Heat sealing equipment

Heating gases and liquids

Hot runner molds

Hot stamping

Labeling machines

Medical equipment

Molds and Dies

Packaging equipment

Plastic extruders

Plastic molding

Shoe machinery

Help Me Choose A Heater


Diameter (Metric): 3mm, 4mm, 5mm, 6mm, 6.5mm, 8.0mm, 10mm, 12mm, 12.5mm, 14mm, 16mm, 18mm, 20mm (Non-standard can be customized)
Diameter (Inch): 1/8", 1/4", 3/8", 1/2", 5/8", 3/4" (non-standard can be customized)
Jacket Material: A stainless steel 304 B. 310S C.NCF800.
The maximum temperature of the heating element jacket: 750 ℃
Resistive material: NiCr8020
High voltage stability (temperature) 

Rated voltage ≤24V~500V DC, >24V~1500V AC
Insulation resistance (500V DC unheated): ≥50MΩ
The maximum leakage current (253V AC unheated): ≤0.5mA
Length error: ± 1.5mm
Power error (not heated): + 5% ~10%
Input voltage: 12V~440V (non-standard can be customized)
Terminal unheated length: <3mm~20mm
Non-terminal unheated length: <3mm~20mm

Connecting Wires:

(1). glass fiber insulation nickel wire (temperature 450 degrees -750 degrees)

(2). Crimp Teflon line (temperature 250 degrees)
(3). Crimp silicon insulated wire (temperature 200 degrees)
(4). Crimp fiberglass insulated nickel wire (temperature 450 degrees)

1. The basic structure of the heat pipe:

When making heat pipe, we use stainless steel for housing, uniforms spiral heating alloy wire (nickel-chrome 8020) along the central axis of the tube, fill and compact the space with magnesium oxide sand having good insulation and thermal conductivity, seal the mouth of the pipe with liquid glue, silicone or ceramic glue(we can do moistureproof design if it is in the wet environment) and make connecting wires with pure nickel (copper) which has high temperature resistant. The metal heating element can heat air, mold, and various liquids.

2. Special design of heat pipe:

According to different use state, safety and installation requirements of heat pipe, heat pipe includes sealing structure, 90 degree elbow outlet, flange fixing, crimping corrugated pipes, crimping stainless steel mesh, pipe with screw device, built-in thermocouples, fuses and other structures.

3. Property, application and life of heat pipe:

Heat pipe is made by placing heating elements in a metal tube and filling crystalline magnesium oxide powder with good heat resistance, thermal conductivity and insulating in the gap closely and then managed by other treatments. Heat pipe is heating element designed specially to convert electrical energy into heat energy. It has a simple structure, high mechanical strength, high thermal efficiency and is safe, reliable and easy to install. Heat pipe can be widely used in plastic molds, packaging machinery, extruders, automation equipment, medical equipment, heat-pressing dies and so on.
It has more than 10,000 hours service life under normal use.

4. Calculation of heat pipe resistance:

For examples: 220V1500W electric tube
P = 1500 watts (power) U = 220 V (voltage) Find the I (current)
I = P / U = 1500 / 220≈6.82 Ann
Ohm's law seeking: R (resistance)
R = U / I = 220 / 6.82≈32.27 Europe

5. Notes on the use of heat pipes:

1. Heat pipe should be kept in a dry place.
2. Do distinguish positive electrode and negative electrode when wiring heat pipe with thermocouples.
3. Pay attention to the voltage when connecting the power supply with heat pipe.

Cartridge Heaters also called Single-head Heating Tube

Cartridge heater is a tubular, heavy-duty, industrial Joule heating element (resistance), used in the process heating industry, usually customized and manufactured to a specific power density according to its intended application. They are highly compacted and have a surface power density of up to 50 W/cm².

It can be used to heat any kind of substance or material, such as oil, air, or sugar. However, a common application is plastic pellets, which are melted to form molded plastic parts. An example of such a process is the "hot runner" process. Cartridge heaters are similar in structure to tubular heaters but tend to have a higher power density.


1. Mould Heating

2. Heating System of Plastic Machinery

3. Pharmaceutical Production Line

4. Heat Treatment Test in Laboratory

5. Chemical Industry

Cartridge Heaters are typically inserted into drilled holes to heat platens and molds or used as liquid immersion heaters.

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