HCV AC – Forced air circulation furnaces 

HCV AC – Forced convection chamber furnace up to 1000ºC
High homogeneity and optimal air distribution

Nadcap AMS2750H & CQI-9 compliance

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AC8

Forced air circulation furnaces up to 600ºC, 800ºC and 1000ºC for heat treatment processes such as quenching, tempering, sintering, welding, annealing, hardening and other processes requiring high homogeneity, compatible with AMS 2750 aerospace standards.

Standard equipment

  • Volumes from 45 to 1000 liters
  • Maximum temperatures of 600ºC, 800ºC and 1000ºC
  • Optimal temperature distribution
  • Asynchronous engine – Radial-bladed fan
  • A310 steel chamber
  • Ramp programmer up to 64 steps
  • Pantograph side door
  • Double casing with air chamber to have low surface temperature
  • Solid state relays provide for low noise operation
  • Over temperature alarms (OTP Over temperature protection)
  • Safety switch
  • Safety contactor
  • Heating pilot light
  • Thermocouples K (1000ºC)
  • Homogeneity +/-5ºC – Stability +/-1ºC
  • Furnace shutdown in case of thermocouple breakage
  • Chimney at the rear of the furnace
  • Furnace control at the right side of the furnace

Controllers

  • Eurotherm EPC 3016 programmer (10 programs – 25 segments) + itools logging software (allows curve downloads in Excel format) via Ethernet
  • Nanodac programmer according to AMS2750E and 21CFR11 standards

Accessories

  • Smoke extractor chimney
  • Forced smoke extractor chimney
  • Controlled cooling by fresh air turbine and exhaust flap
  • Inert gas for manual or automatic gas supply system
  • Ceramic or metal rack for loading ceramic or steel trays
  • Port for thermocouple
  • Observation windows
  • Inox construction
  • Annealing box with salts and/or gas
  • Nitriding box with salts and/or gas
  • Ceramic trays, refractory steel plates, steel collection pan
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What is AMS2750E?

The AMS2750E standard, also known as Aerospace Material Specification 2750E, is the international regulation that governs the control and calibration of thermal processes in the aerospace industry. Its purpose is to ensure traceability, accuracy, and repeatability in heat treatment processes such as hardening, tempering, annealing, and other critical operations applied to aircraft, satellite, and space system components.

In practical terms, this specification defines:

  • Furnace classes based on temperature uniformity.

  • Calibration and verification frequency for control and recording instruments.

  • SAT and TUS protocols (System Accuracy Test and Temperature Uniformity Survey).

  • Documentation and traceability requirements for aerospace audits.

Compliance with AMS2750E is not only a quality assurance measure but also a mandatory requirement for suppliers in the aerospace industry, as well as in other demanding sectors such as defense and advanced automotive.

 

 AMS2750 Classes for Furnaces and Ovens
   
Class Uniformity
1 ± 3°C
2 ± 5 °C / ± 6 °C
3 ± 7 °C / ± 8 °C
4 ± 10°C
5 ± 14°C
6 ± 28°C

The HCV AC Series range of chamber furnaces are very sturdy, high quality industrial furnaces for the heat treatment of small and large parts in oxidizing atmosphere (air) or controlled atmosphere.
Furnaces made of high quality bricks and ceramic fibres with air chambers.

HCV AC Series – Forced convection chamber furnaces up to 600ºC, 800ºC and 1000ºC for heat treatment processes such as quenching, tempering, sintering, welding, annealing, hardening and other processes requiring high homogeneity, compatible with AMS 2750 aerospace standards.

Heating elements on freely radiating support tubes in the furnace chamber allow particularly short heating times and a maximum temperature of 600 °C, 800ºC, 1000ºC with 5 heated zones for high homogeneity.

Asychronous engine for a better temperature distribution inside the furnace

The air flow is produced by a motor located at the rear or top – outside of the furnace, which is connected by a shaft to a refractory steel turbine

The chiller is required to cool the forced circulation motor/fan. The motor shaft has a water circuit to protect the motor

 

 

Instrumentation components

Type  A

Type B

Type C

Type D

Type D+

Type E

Control instrument with temperature display

X

X

 X

X

X

X

Control sensor

X

X

X

X

X

X

Control instrument recorder

X

X

X

X

X

 

Over-temperature protection instrument

X

X

X

X

X

 

Over-temperature protection sensor

X

X

X

X

X

 

Multipoint chart recorder (or separate channel in control instrument recorder)

X

X

X

 

 

 

High temperature protection sensor connected to multipoint recorder

 X

 

 X

 

 

 

Low temperature sensor connected to multipoint recorder

 X

 

 X

 

 

 

Load sensor connected to multipoint recorder

 X

 X

 

 

 

 

Recording sensor(s) per Zone

 

 

 

 

X