Product Details

DJ-22 bolt electric heater is designed for heating turbine bolts. The table lists models with specifications: bolt diameter, protective tube length L, heating length I1, cold end length I2, and power W. Technical requirements include: materials (magnesium oxide insulation, 0Cr27A17Mo2 alloy wire, 1Cr18Ni9Ti stainless steel tube), working voltage 220±20V (DC 100V, low voltage 50V), straightness ≤0.3mm for length ≤1m, diameter tolerance -0.20/-0.50mm, length tolerance ±5mm, uniform heating, lifespan ≥50h under intermittent heating with gap 0.8-1.3mm, good grounding, no cracks after cold drawing, sealed cold end, insulation resistance ≥50MΩ after 1.5 months.