ERSA

Hotflow 3 20

Q: What process does the Hotflow 3 20 perform?

The Hotflow 3 20 performs reflow soldering for surface-mount assemblies.

Thermal / Diffusion ERSA Hotflow 3 20 family

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ERSAHotflow 3 20

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Power

65 kW – 104 kW (subject to configuration)^[2]

Vacuum

400 m³/h, 2 stacks^[2]

What it is

The Hotflow 3 20 is a reflow soldering machine manufactured by Kurtz Ersa. The system includes a process tunnel that is 100 % tested for gas sealing. The machine measures 6,590 mm in length, 1,530 mm in width, and 1,450 mm in height (closed) and weighs approximately 3,200 kg.^[1]^[2]^[4]

How it works

The Hotflow 3 20 uses forced convection heating with Ersa multijet nozzles. The basic configuration includes 7 top-side preheating zones and 3 top and bottom-side peak zones. Cooling is provided by a basic cooling step from top and bottom; an optional 4-stage version with water recooling is available. The conveyor system supports dual, triple, or quad track configurations for increased throughput. The machine features automatic chain lubrication, and heating and cooling modules are retractable without tools. Process control is handled by Ersa Process Control (EPC) and AutoProfiler software.^[1]^[5]^[2]^[4]

What do the numbers mean?

Power & electrical3

Nominal rating: 65 kW – 104 kW (subject to configuration)^[2]
Continuous rating for operation: approx. 12 – 19 kW^[2]
Electrical supply: 3 x 400 V, N, PE, 50/60 Hz, max fuse 3 x 100 A^[2]

Vacuum & pumping2

Exhaust volume per stack: 400 m³/h, 2 stacks^[2]
Exhaust volume per stack: 400 m³/h^[2]

Dimensions & facilities8

Conveyor working width: 45 – 580 mm^[2]
Dimensions (L x W x H): 6,590 mm x 1,530 mm x 1,450 mm^[2]
Weight (incl. options): approx. 3,200 kg^[2]
Board clearance (standard): +25/-37 mm^[2]
Board clearance (option): +35/-37 mm^[2]
Conveyor height from floor: 820 – 980 mm^[2]
Dimensions (L x W x H): 6,590 mm x 1,530 mm x 1,450 – 1,580 mm^[2]
Working width (conveyor): 45 – 580 mm^[2]

Configuration & options11

Heating zones (basic): 7 top-side preheating zones, 3 top and bottom-side peak zones^[1]
Cooling zones: 4-stage version with water recooling (basic: 1 stage)^[2]
Conveyor speed: 20 – 200 cm/min^[2]
Process length: 5,190 mm^[2]
Heated length: 3,700 mm^[2]
Cooling length: 1,490 mm^[2]
Noise level (permanent): < 70 dB (A)^[2]
Heating length: 3,700 mm^[2]
Number of preheating zones: 7 top-side^[1]
Number of peak zones: 3 top and bottom-side^[1]
Noise level: < 70 dB (A)^[2]

Vintage & configurations

Documented models & variants

Designation	Generation	Vintage	Changes	Source
HOTFLOW 3/20 e	HOTFLOW 3	—	A variant of the HOTFLOW 3/20; specific differences not detailed in sources.	kurtzersa.com.cn^[1]
HOTFLOW 3/20 si	HOTFLOW 3	—	Smart Intelligence (SI) platform with advanced process monitoring, recipe management, and Industry 4.0 connectivity; includes 20 independently controlled heating zones (note: base 3/20 also has up to 20 heating cassettes but SI may have separate control).	fuliu-smt.com^[3]
HOTFLOW 3/20 XL	HOTFLOW 3	—	Extended version of the HOTFLOW 3/20; specific differences not detailed in sources.	kurtzersa.com.cn^[1]
HOTFLOW 3/14	HOTFLOW 3	—	—	kurtzersa.com.cn^[1]
HOTFLOW 3/26 XL	HOTFLOW 3	—	—	kurtzersa.com.cn^[1]

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What does it need to run?

Site utility requirements, footprint, and infrastructure needed to install and operate this tool. Sourced from public records.

Nominal rating65 kW – 104 kW (subject to configuration)^[2]
Continuous rating for operationapprox. 12 – 19 kW^[2]
Electrical supply3 x 400 V, N, PE, 50/60 Hz, max fuse 3 x 100 A^[2]
Exhaust volume per stack400 m³/h, 2 stacks^[2]
Exhaust volume per stack400 m³/h^[2]

Where are the manuals?

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Not publicly documented

Field notes

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Frequently asked questions

What process does the Hotflow 3 20 perform?

The Hotflow 3 20 performs reflow soldering for surface-mount assemblies.^[6]^[1]

Not publicly documented

The following facts about the Hotflow 3 20 are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.

No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the Hotflow 3 20 are on record.
Answerable by: OEM historical records or a trade-press announcement
The control-system platform and OS era of the Hotflow 3 20 are not on record.
Answerable by: an engineer who operated it or OEM installation records
No publicly documented failure modes or field errata for the Hotflow 3 20 are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the Hotflow 3 20 is not on record.
Answerable by: an OEM datasheet or a fab qualification report
No publicly documented compatible parts, consumables, or accessories for the Hotflow 3 20 are on record.
Answerable by: an OEM parts catalog or a service engineer

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Sources & citations

Sources (6)Every fact above is drawn from these public sources

[1]kurtzersa.com.cn — kurtzersa.com.cnkurtzersa.com.cn
[2]belmet.si — belmet.sibelmet.si
[3]fuliu-smt.com — fuliu-smt.comfuliu-smt.com
[4]Ersa HOTFLOW 3/20 Reflow Oven — flasonsmt.comflasonsmt.com
[5]https://hitech5.com/wp-content/uploads/2020/10/HotFlow-3-20.pdf — hitech5.comhitech5.com
[6]Equipment inventory listing