Hot Runner / nozzles

Micro heater table

Suggested selection by actual winding diameter and heated length, plus the standard 2.2 × 4.2 mm range.

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Technical selection

Suggested power by nozzle diameter and heated length

The diameter used in the calculation is the actual core diameter or winding surface, which may be smaller than the nominal outside diameter of the nozzle. Selection always uses the next lower standard heated length relative to the calculated theoretical length.

Higher thermal demand / lower melt flow — factor 0.75

As an orientation for materials or process conditions requiring greater heat input, such as PET, PC or higher-viscosity polymers. With a 2.2 × 4.2 mm section, theoretical pitch is about 5.6 mm and spacing between turns about 1.4 mm.

Core Ø (mm)	20 mm	25 mm	30 mm	36 mm	40 mm	50 mm	60 mm	70 mm	80 mm	100 mm
12	Custom134 mm	180 WTotal L 200	200 WTotal L 265	225 WTotal L 315	250 WTotal L 345	275 WTotal L 400	300 WTotal L 450	400 WTotal L 600	400 WTotal L 600	625 WTotal L 800
16	180 WTotal L 200	200 WTotal L 265	250 WTotal L 345	275 WTotal L 400	300 WTotal L 450	300 WTotal L 450	400 WTotal L 600	550 WTotal L 750	625 WTotal L 800	750 WTotal L 1000
20	200 WTotal L 265	225 WTotal L 315	275 WTotal L 400	300 WTotal L 450	350 WTotal L 525	400 WTotal L 600	550 WTotal L 750	625 WTotal L 800	750 WTotal L 1000	900 WTotal L 1200
22	200 WTotal L 265	250 WTotal L 345	275 WTotal L 400	300 WTotal L 450	350 WTotal L 525	400 WTotal L 600	625 WTotal L 800	700 WTotal L 950	800 / 850 WTotal L 1100	900 WTotal L 1200
25	225 WTotal L 315	275 WTotal L 400	300 WTotal L 450	350 WTotal L 525	400 WTotal L 600	500 WTotal L 720	625 WTotal L 800	750 WTotal L 1000	900 WTotal L 1200	1000 WTotal L 1400
30	250 WTotal L 345	300 WTotal L 450	350 WTotal L 525	400 WTotal L 600	550 WTotal L 750	625 WTotal L 800	750 WTotal L 1000	900 WTotal L 1200	1000 WTotal L 1400	1150 WTotal L 1600
35	275 WTotal L 400	350 WTotal L 525	400 WTotal L 600	550 WTotal L 750	625 WTotal L 800	700 WTotal L 950	900 WTotal L 1200	1000 WTotal L 1400	1150 WTotal L 1600	1250 WTotal L 2000
40	300 WTotal L 450	350 WTotal L 525	500 WTotal L 720	625 WTotal L 800	700 WTotal L 950	800 / 850 WTotal L 1100	900 WTotal L 1200	1150 WTotal L 1600	1200 WTotal L 1800	Contact us2253 mm
50	350 WTotal L 525	500 WTotal L 720	625 WTotal L 800	750 WTotal L 1000	800 / 850 WTotal L 1100	900 WTotal L 1200	1150 WTotal L 1600	1250 WTotal L 2000	Contact us2295 mm	Contact us2786 mm
60	400 WTotal L 600	625 WTotal L 800	750 WTotal L 1000	900 WTotal L 1200	1000 WTotal L 1400	1150 WTotal L 1600	1250 WTotal L 2000	Contact us2344 mm	Contact us2734 mm	Contact us3320 mm

Moderate thermal demand / good melt flow — factor 0.60

As an orientation for materials with good melt flow, such as PE or PP, when the process allows lower installed power. Theoretical pitch is about 7.0 mm and spacing between turns about 2.8 mm.

Core Ø (mm)	20 mm	25 mm	30 mm	36 mm	40 mm	50 mm	60 mm	70 mm	80 mm	100 mm
12	Custom89 mm	Custom134 mm	180 WTotal L 200	200 WTotal L 265	200 WTotal L 265	250 WTotal L 345	275 WTotal L 400	300 WTotal L 450	350 WTotal L 525	400 WTotal L 600
16	Custom114 mm	180 WTotal L 200	200 WTotal L 265	250 WTotal L 345	250 WTotal L 345	300 WTotal L 450	300 WTotal L 450	400 WTotal L 600	400 WTotal L 600	625 WTotal L 800
20	180 WTotal L 200	200 WTotal L 265	225 WTotal L 315	275 WTotal L 400	275 WTotal L 400	350 WTotal L 525	400 WTotal L 600	550 WTotal L 750	625 WTotal L 800	750 WTotal L 1000
22	180 WTotal L 200	200 WTotal L 265	250 WTotal L 345	275 WTotal L 400	275 WTotal L 400	350 WTotal L 525	400 WTotal L 600	625 WTotal L 800	625 WTotal L 800	800 / 850 WTotal L 1100
25	180 WTotal L 200	225 WTotal L 315	275 WTotal L 400	300 WTotal L 450	300 WTotal L 450	400 WTotal L 600	500 WTotal L 720	625 WTotal L 800	750 WTotal L 1000	900 WTotal L 1200
30	200 WTotal L 265	250 WTotal L 345	300 WTotal L 450	350 WTotal L 525	350 WTotal L 525	550 WTotal L 750	625 WTotal L 800	750 WTotal L 1000	800 / 850 WTotal L 1100	1000 WTotal L 1400
35	200 WTotal L 265	275 WTotal L 400	350 WTotal L 525	400 WTotal L 600	400 WTotal L 600	625 WTotal L 800	700 WTotal L 950	900 WTotal L 1200	900 WTotal L 1200	1150 WTotal L 1600
40	225 WTotal L 315	300 WTotal L 450	350 WTotal L 525	500 WTotal L 720	500 WTotal L 720	700 WTotal L 950	800 / 850 WTotal L 1100	900 WTotal L 1200	1000 WTotal L 1400	1200 WTotal L 1800
50	250 WTotal L 345	350 WTotal L 525	500 WTotal L 720	625 WTotal L 800	625 WTotal L 800	800 / 850 WTotal L 1100	900 WTotal L 1200	1150 WTotal L 1600	1200 WTotal L 1800	Contact us2295 mm
60	300 WTotal L 450	400 WTotal L 600	625 WTotal L 800	750 WTotal L 1000	750 WTotal L 1000	1000 WTotal L 1400	1150 WTotal L 1600	1250 WTotal L 2000	Contact us2148 mm	Contact us2734 mm

Each cell shows the suggested standard power and, below it, the total length of the selected micro tubular heater.

Calculation: mean turn development = (core Ø + 2.2) × 3.14. Number of turns = integer below [(nozzle length ÷ 4.2) × factor]. Theoretical heater length = turns × mean development. The next lower standard heated length is then selected.

Values are indicative. Final power also depends on process temperature, throughput, viscosity or melt-flow index, nozzle mass, heat losses, insulation and mounting conditions.

Standard 2.2 × 4.2 mm micro tubular heater range

Total length (mm)	Heated length (mm)	Power
200	135	180 W
265	200	200 W
315	250	225 W
345	280	250 W
400	335	275 W
450	385	300 W
525	460	350 W
600	535	400 W
700	635	450 W
720	650	500 W
750	685	550 W
800	735	625 W
950	885	700 W
1000	935	750 W
1100	1030	800 / 850 W
1200	1150	900 W
1400	1335	1000 W
1600	1535	1150 W
1800	1735	1200 W
2000	1935	1250 W
2100	2000	1400 W

Standard micro tubular heater table for Hot Runner nozzles

Suggested 2.2 × 4.2 mm micro heater selection by nozzle diameter and heated length, using 0.75 and 0.60 factors.

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