Coil spiral tubular heating elements is a fitting of hot runner heater, wattage from 115W to 2000w each element, spiral heater inside diameter can be range from 10mm to 42mm

Spiral heater is made of

The spring coil heating element is made of high-quality stainless steel and strict process technology. The spiral heater has various forms of circular section, square section and flat section. The outer surface has two effects of bright and sand blasting treatment, and can be equipped with K-type, J-type or E-type thermocouples. Spiral heater is widely used in hot runner plastic mold, blow molding machine, extruder and hot nozzle (sprue sleeve and nozzle).

Technical Specifications

Outer sheath material: High quality 304SS or 316L

Inside magnesium oxide insulation material: OTC (U.S.A) high purity MgO tube

Heating element: high durance and high temperature NiCr2080 heating elements from Germany

TC material: High quality TC elements to ensure ±5℃tolerance

Max. working temperature: 700℃

High voltage stability test:

Less than 0.5mA leak under 800V for 15 seconds

Cross sections optional:

4x4mm, 3.5x3.5mm, 3.3x3.3mm, 3x3mm, 4.2x2.7mm, 4.2x2.5mm, 4.2x2.2mm, 4x2mm, ø4.5mm, ø4.2mm, ø4mm, ø3.8mm, ø3.45mm, ø3.2mm, and ø3.0mm

The range of the length of heated length: 100mm----4000mm 

Maximum power density: 9w/cm²

Cold zone length: 50mm standard, and other sizes available

Dimensions of cold zone adaptor: 8x30mm and 6.35x25mm optional

Standard leads:  1000mm black Teflon wire over 300℃