Econoclave EC6X12

Econoclave® Model: EC6X12

  • The Econoclave is an energy efficient EC6X12 Econoclave
  • The Econoclave is an energy efficient EC6X12 Econoclave
  • The Econoclave is an energy efficient EC6X12 Econoclave

The Econoclave ® 6X12 is a great composite autoclave for small to medium-sized production parts.   It provides a useable diameter of 72” (1828 mm) and a working length of 144” (3657 mm). You can choose from standard models that provide maximum operating temperatures of 450°F (232°C) and 800°F (427 °C) and maximum operating pressures of 150 psi and 200 psi.    

Note: If you require higher operating conditions, ASC can configure a non-standard model.

  • The working diameter is 72” (1828 mm) with a working length of 144” (3657 mm). 
  • Aerospace-grade autoclave, designed for composite bonding and curing.
  • Fully-integrated and 100% factory tested prior to shipping.  A skid-mounted control system, power system, vacuum system, cooling tank (optional), and other auxiliaries are plumbed, wired, and tested at ASC’s factory.
  • Pressure vessel designed to stringent ASME Division I, Section VIII requirements.
  • Hydraulically operated quick-opening door using ASC’s all-forged, 3-piece ring technology and multi-redundant door locking safety system provides mechanical, pneumatic, and electrical interlock.
  • CPC (Composite Processing Control) system, the most popular controls package in the world for composite curing.
  • Econoclave ® eco-friendly design results in a smaller vessel and 20% energy and nitrogen savings versus a conventional autoclave.
  • High-capacity circulation fan for high airspeeds, improved temperature uniformity, and excellent heat-transfer to part and tooling loads.
  • Front and rear H-Slot ® flow adjustment technology for superior flow and temperature uniformity.  
  • A high-capacity modular heater designed with sheathed Inconel heating elements for long life.
  • Internal stainless-steel cooling exchanger for excellent cooling performance. 
  • Control valve package for pressure, cooling, and vacuum control.  Featuring stainless-steel control valves, proportional actuation, and high reliability.
  • High-capacity vacuum source lines with PC-controlled Vacuum/Vent valves for automated selection, isolation, and leak-testing.   
    • Each line includes a manual isolation valve and resin filter traps with a manual drain.
    • Stainless-steel tubing 
  • Vacuum probe lines for vacuum bag monitoring
  • Stainless-steel tubing 
  • Vacuum transducer for accurate bag vacuum recording and alarming.
  • Proprietary sheet metal retaining requiring no fasteners, screws, or rivets to create future FOD issues.

Econoclave Notes:

  1. The exterior dimensions are approximated due to fabrication and assembly tolerances. If you require a smaller equipment footprint, please contact ASC to discuss your size constraints.
  2. For Econoclaves with an integrated computer shelf, the exterior width includes the shelf. Because the Econoclave is shipped without the shelf, shipping width will be reduced by approximately 8" (203mm).
  3. Lengths shown are based on an integrated system that includes the skid platform and a closed-loop cooling system.
  4. If the above dimensions, operating conditions, or specifications do not meet your exact requirements, please contact ASC to discuss a custom autoclave configuration.
  5. ASME is the standard pressure vessel design code for the US, Canada, and dozens of other countries. In all cases, ASC will design to meet the appropriate codes, however for non-ASME jurisdictions, there will be a slight increase in price. These additional codes are explained in the "Available Options" tab and in the request forms. For the European Union, please choose PED (Pressure Equipment Directive). For China, please choose CHI (China Pressure Vessel Certificate). For Japan, please choose JIS (Japan Industrial Standards).
  6. The autoclave will be internally insulated for the maximum operating temperature shown. Because the autoclave is internally insulated, the pressure vessel will not be subjected to internal temperatures and therefore the pressure vessel steel is not required to be rated at maximum temperature and is rated per code at 450 °F (232 °C).
  7. Maximum heating and cooling rates are based on average air-temperature rates with the autoclave at maximum pressure and loaded according to the "Thermal load during test" value. During the max heating rate test, the autoclave will be heated at maximum power from ambient to the maximum operating temperature. When the air temperature reaches maximum temperature, the elapsed heating time will be used to calculate the average rate. MaxTemp - AmbientTemp)/elapsed time.
  8. Maximum cooling rates are based on average air-temperature rates from maximum operating temperature to 140 °F (60 °C) with the autoclave at maximum pressure and loaded according to the "Thermal load during test" value. During the max cooling rate test, the autoclave will be loaded with the thermal load, heated to the maximum operating temperature, soaked for 30 minutes, and then rapidly cooled. When the air temperature reaches below 140 °F (60 °C) the elapsed cooling time will be used to calculate the average rate. (MaxTemp - 140) / elapsed time.
  9. Uniformity is taken at steady-state conditions and is based on thermocouples being placed not closer than 4 inches from the side, rear, or front of the autoclave. At higher temperatures, automatic air temperature biasing might be utilized in the control system in order to center the thermocouples within the tolerance band.
  10. The maximum external shell temperature is based on ambient shop temperatures of not more than 90 °F (32 °C). If the ambient temperature is higher than this, the external surface temperature might exceed the value shown in the specification. Temperatures around nozzles, flanges, and other penetrations might exceed this value, but in these cases, ASC will suitably guard the region to provide personnel safety. If any portion of the autoclave is exposed to direct sunlight, surface temperatures will exceed this value due to radiant energy effects.
  11. ASC rates the pressure vessel 15 psi (1.1 bar) over the normal maximum working pressure. Although not specifically required by code, this is a good measure to ensure that the safety relief valve is not triggered during normal operations.
  12. Pressurization rates are based on the average rate from 0 psig (0 bar) to maximum operating pressure. This rate is based on the customer's supply pressure being at least 50 psig (3.5 bar) above ASC's maximum operating pressure. If the customer's supply pressure is lower than the average autoclave pressurization rate will drop accordingly. Depressurization rates are based on the average rate from maximum operating pressure to less than 1 psig (70 mbar).
  13. The full-load amperage will increase with the addition of a cooling system, vacuum pumps, etc. For exact amperage for optional configurations, please contact ASC.
  14. Smaller autoclaves with standard manual operating door swing and ring rotation can be upgraded with an optional hydraulic package. See options.
  15. Although Econoclaves come standard with a specific number of vacuum sources, probes, and thermocouples, you can request alternate quantities when filling in the request form.
  16. For those customers who intend on producing parts for Boeing or Boeing's sub-suppliers, please be aware that Boeing's autoclave certification D6-49327 requires a minimum of 9 part thermocouples.
  17. The Econoclave can be ordered to accommodate any of the world's power requirements. See PW options for more details.
Interior DimensionsSpecificationsSee Notes ( Show all / Hide all )

Interior Dimensions


See Notes

  • Working diameter (excluding floor)
  • Working length (front of floor to rear H-slot panel)
  • Floor to Ceiling (at the vertical position, +/- 12mm)
  • Shop floor to Autoclave floor
  • 72” (1828 mm)
  • 144” (3657 mm)
  • 58” (1473 mm)
  • 28” (711 mm)
Exterior Dimensions (with integrated skid)  
  • Overall width with the door closed
  • Overall width with the door open
  • Overall length with the door closed
  • Overall length with the door open
  • Overall height
  • 114 5/8” (2608 mm)
  • 150” (3302 mm)
  • 297” (7544 mm)
  • 360” (9154 mm)
  • 86” ( 2479 mm)
  • Note 1,2,3
  • Note 1,2,3
  • Note 1,3
  • Note 1,3
  • Note 1
Temperature Capability  
  • Maximum interior working temperature
  • Maximum heating rate (average air)
  • Maximum cooling rate (average air)
  • Thermal load during the test
  • Temperature uniformity at steady state
  • External shell temperature at a maximum temperature
  • 450°F (232°C)
  • 10 °F/min (5.5 °C/min)
  • 10 °F/min (5.5 °C/min)
  • 3,000 lbs (1360 kg) steel
  • +/- 5 °F (+/- 2.8 °C)
  • <140° (60 °C)
  • Note 7
  • Note 8
  • Note 9
  • Note 10
Pressure Capability  
  • Maximum normal working pressure
  • Maximum vessel design pressure (MAWP)
  • Maximum pressurization rate (average)
  • Maximum depressurization rate (average)
  • 150 psig (10.3 bar)
  • 165 psig (11.3 bar)
  • 10 psi/min ( .69 bar/min)
  • 10 psi/min ( .69 bar/min)
  • Note 11
  • Note 12
  • Note 12
  • Pressure vessel fabrication
  • Door closure
  • ASME or option PED, carbon steel
  • Quick-opening, Hydraulic
  • Note 5
Interior fabrication 
  • Internal insulation
  • Sheet metal
  • Sheet metal retention
  • Rail type and max loading
  • Floor loading
  • 4” ceramic fiber
  • 18 GA Aluminized steel
  • Screw-less capture system
  • Inverted angle, 4000 lbs (682 kg) on 4 wheels
  • 500 lbs (227 kg)
Air-circulation System 
  • Fan Motor
  • Air Velocity
  • H-Slot ® Flow Adjustment System
  • 30HP (22.3kw)
  • 250 ft/min (76 m/min)
  • Front and Rear
Heating System 
  • Heater
  • Heating Control
  • Electric, 136 KW, 1 bank, Inconel sheathed
  • Proportional SSR with backup contactor
Cooling System 
  • Cooling coil
  • Main cooling valve
  • Trim and air valves
  • Coil drain system
  • Multi-row 5/8” finned tubing, stainless-steel
  • 1” (25mm), solenoid-actuated
  • ½” (12mm), solenoid-actuated
  • Air-assisted coil purge
Pressurization System 
  • Pressure transducer
  • Pressure gauge
  • Inlet valve
  • Exhaust valve
  • Silencer
  • Manual exhaust valve
  • 0-200 psig, ¼% FS accuracy
  • At the door, 4-½” dial, 0-200 psig, ¼% accuracy
  • 1” (25mm), electro-pneumatic
  • 1” (12mm), electro-pneumatic
  • Yes
  • ½”
  • Vacuum Source Line Quantity
  • Vacuum Source Line Size
  • Computer-controlled valves on each line
  • Resin filter trap
  • Vacuum Probe Line Quantity
  • Vacuum Probe Line Size
  • 6
  • ½” npt
  • VAC and VENT
  • Yes
  • 6
  • ¼" npt
  • Note 15
  • Note 15
  • Thermocouple type
  • Air temperature thermocouples
  • Part temperature thermocouples
  • Hi-Limit safety thermocouple
  • J or K
  • 1
  • 12
  • 1
  • Note 15
  • Note 15,16
  • Note 15
Control System 
  • Primary Controller
  • Control Software
  • PLC and control hardware
  • Report Printer
  • Electrical enclosures
  • PC enclosure
  • Computer, Dell Optiplex
  • CPC - Composite Processing Control
  • Allen Bradley CompactLogix
  • HP Color Deskjet 6940 (or Equiv)
  • One, Nema-12, housing control and power
  • None. PC on a customer provided shelf.
Power System 
  • Primary power
  • Control power
  • Full load amps
  • 480V / 3PH / 60Hz
  • 120V / 1PH / 60Hz
  • 120A
  • Note 17
  • Note 17
  • Note 13
  • Approximate shipping weight
  • 23,000 lbs. or 10,432 kg

VS - Vessel design and construction code

Although many countries accept the ASME Division I, Section VIII pressure vessel standard, there are cases where an alternate pressure vessel code will be required. In these cases, there will be additional costs that are required for authorized inspection services.

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PW - Power, voltage, frequency selection

Although the standard Econoclave autoclave is designed for 480 volt / 3phase service and 24 volt control power, we can design it to accommodate any international voltage and frequency requirement.

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CL - Cooling system options

The autoclave utilizes water for auxiliary cooling requirements (ie. fan motor capsule) and for main cooling requirements. Some customers prefer to utilize their own water delivery system, however the majority of Econoclave buyers prefer that ASC provide an integrated cooling system for the equipment.

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VP - Vacuum pumps

While some customers prefer to use in-house vacuum systems to supply vacuum to the Econoclave, most prefer that a dedicated pump or pumps be provided on the Econoclave skid.

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VR - Controlled vacuum receiver system

Many composite applications require full vacuum during and or at the beginning of the cure cycle. In these cases, there is little need to control the level of the vacuum to the parts. However, for high-temperature polyimids and honeycomb reinforced parts, there is often the need to provide partial vacuum (ie. -10"Hg) to the parts. In these cases you will need to have a controlled vacuum receiver.

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VT - VacTrap ™ chilled resin traps

For composite curing applications with high volatile content (ie. high-temperature polyimides), we recommend chilled VacTrap ™ assemblies instead of the conventional ambient temperature filter traps. The VacTrap will be much more effective condensing volatiles and solvents during high-temperature curing operations.

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PG - Purge system with oxygen monitoring

Most composite autoclaves utilize nitrogen as the pressurization media. After a cure cycle, there is a need to purge the nitrogen from the autoclave and bring in fresh breathable air prior to allowing personnel to enter the autoclave.

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CT - Floor and autoclave carts

ASC manufactures a wide variety of carts for autoclaves and oven applications.

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BG - Pit transfer bridge

For large autoclaves that are mounted in pits, you will need to purchase a bridge system which spans from the shop floor to the autoclave. (see photo above).

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TR - Transportation of Econoclave to your facility

Although many customers arrange and procure their own transportation, ASC can quote transportation of your Econoclave from ASC’s plant to your facility.

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RG - Offload and Rigging of the Econoclave at your facility

Many customers prefer to handle rigging with their preferred local contractors, however on turnkey projects and on larger Econoclave deliveries, customers often select the ASC rigging option in order to provide a sole-source responsibility for the effort.

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IN - Installation of the Econoclave at your facility

While Econoclaves are easy to install, most customers still prefer that ASC install the autoclave at their facility. There are a couple of installation options that you might want to consider.

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ST- Startup and training by an ASC field engineer

This option provides all costs for an ASC field engineer to travel to your facility to perform startup of the equipment/control system and training of your personnel. The option includes all costs of on-site engineering labor, air fare, travel time, rental car, hotel, and subsistence costs.

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City, State, and Country where autoclave will be installed


Please send me a quotation for the following autoclave

ECONOCLAVE MODEL # EC6X12 - 6 ft. Diameter X 12 ft. Length


150 psig (10.3 bar) @ 450°F (232 °C)

200 psig (13.8 bar) @ 800°F (426 °C)

Non-standard; °F ( °C) @ Pressure psig ( bar)


Please check the options you would like quoted.

VS - Alternate pressure vessel code. Learn more...

PW - Alternate primary and control power. Learn more...

CL - Cooling system options. Learn more...

VP - Vacuum pumps. Learn more...

CT - Floor and autoclave load carts. Learn more...

IN - Installation of Econoclave at my facility. Learn more...


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  • UK
  • USA