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Vacuum Ovens

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Surface reactions become less likely when the heating chamber’s atmosphere is strictly controlled as it is in a vacuum oven. When a complete or near-complete vacuum is created, convection, which is the transfer of heat between gasses and liquids, becomes impossible. The only transfer of heat in a vacuum happens as a result of radiation, and radiant heat is reliably even in its distribution. Read More…

Vacuum Ovens A vacuum oven is a piece of thermal processing machinery that is capable of controlling atmospheric pressure within its heating chamber. Removing all or some atmosphere during a heat treatment process can reduce the number of variables that could compromise a successful treatment. Oxidization, which is the cause of a form of surface degradation in metals, becomes impossible when no oxygen is present in the atmosphere.
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Leading Manufacturers

Round Lake, IL  |  847-546-8225

Grieve’s only business since 1949 has been to design and manufacture industrial ovens and furnaces. Use our depth of knowledge and experience when you require an oven or furnace for powder coating, curing, baking, drying, stress relieving, and more.

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The GRIEVE CORPORATION $$$

Grand Rapids, MI  |  800-368-4768

Weiss Envirotronics is a worldwide leader in the design, manufacturer and service of environmental test chambers. A complete line of standard and custom chambers, from bench top models to full walk-in and drive-in solutions to meet any testing requirement. Not sure what you need? Let one of our applications engineers help. Weiss Envirotronics, Inc is ISO 9001 registered and A2LA accredited.

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Weiss Technik $$$

Maumee, OH  |  800-537-8980

Surface Combustion offers a diverse product offering for batch and continuous furnace designs for atmosphere, nonatmosphere or vacuum processing of ferrous and/or nonferrous components/materials. Surface also produces the industry's most popular endothermic and exothermic gas atmosphere generators.

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Surface Combustion Inc. $$$

Grant, MI  |  231-834-9131

Complete finishing systems are designed around your specific process needs and are optimized to fit within your space requirements. We specialize in producing paint systems for wet and powder coatings, while also providing comprehensive design, fabrication, installation, start-up, and training services. Our complete finishing systems consist of an overhead conveyor, pretreatment washer, dry-off oven, paint/powder booths, cure oven, and controls.

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Quality Finishing Systems $$$

Mansfield, TX  |  682-518-9002

Walton Process Technologies is your thermal equipment and control system specialist. We are a manufacturer and retrofitter of autoclaves, pressure vessels (ASME), bonding presses, ovens and batch process controls. Our pressure vessels are used in many industries such as aerospace/composite, gas/oil, tire treads/rubber & technology. Experience and dedication to superior products & customer service have made WPT a leader in the industry.

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Walton Process Technologies, Inc. $$$

De Pere, WI  |  920-336-9800

The CMM Group provides custom-designed industrial dryers and ovens for a wide range of applications in single or multi-zone configurations. The CMM Group designs and builds conveyorized curing, baking and drying ovens for automated production of small-to-medium sized products. Conveyorized roll support web dryers are available in horizontal or vertical tower design and can handle thin film to heavy gauge substrates, narrow to wide, slow or fast speeds.

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The CMM Group $$$

Saint-Hubert, QC  |  888-797-2342

Pyradia is a leading manufacturer of industrial furnaces and ovens in North America. Our engineering capabilities enable us to deliver heat treating equipment such as drop bottom oven for aluminum heat treating as well as controlled atmosphere modular heat treating lines. We serve the Aerospace, Automotive, Defense, Heat Treating and bearings industries among others. Pyradia also has 2 additional divisions manufacturing roll-to-roll web converting equipment and dust collecting systems.

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Pyradia, Inc. $$$
placeholder image The GRIEVE CORPORATION Weiss Technik Surface Combustion Inc. Quality Finishing Systems Walton Process Technologies, Inc. The CMM Group Pyradia, Inc.

Vacuum ovens have a number of advantages over other types of industrial ovens. In drying, negative pressure from the vacuum works together with the heat allowing drying to take place at lower temperatures than would otherwise be possible. Some laboratories use vacuum ovens for drying heat-sensitive materials. Vacuum ovens may be walk-in or truck-in batch ovens or smaller cabinet ovens.

The process of applying heat treatment begins with loading an item or several items into an oven. Unlike with other heat treating processes, the number of kinds of ovens available to heat treating technicians is limited; conveyor ovens are not suitable solutions in vacuum heat treatment.

Outside the confines of a vacuum chamber, atmospheric conditions cannot be maintained. Within the vacuum chamber, there would be no use for a conveyor as heat distribution is completely even throughout the chamber. The most likely variety of industrial oven in vacuum heat treatment contexts would likely be a batch oven if several smaller items were to be treated. In the case of a single, large item, a walk-in or truck-in oven would be suitable. The chamber would be sealed after loading the oven, and a vacuum would be created by pumping atmosphere out of the chamber.

Any variety of heat sources could be used to heat the newly evacuated chamber; gas-fired ovens and electric heat sources are both used to heat vacuum ovens. The product, once sufficiently heated, is sometimes quenched with an inert gas that allows the product to cool quickly. The gas is then evacuated through heat transfer equipment, and the product is ready to be removed from the vacuum chamber.

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