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300 N 26th Avenue, PO Box 625, Cornelius, OR 97113

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4001 East Plano Parkway, Suite 200 Plano, TX 75074


TVO-2-A Vacuum Automation Oven


Part Id: CTVA223

AUTOMATED – TVO-2-A features Easy Push Button Execution of the Pre-Programmed Drying Process. Pneumatic solenoid valves open and close a vacuum valve and a backfilling valve. The Vacuum Valve is controlled by the Watlow PM9 Plus and is based on time. Great for multiple pump/purge processes.

Also available in 220 VOLTS.

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Product Description

TVO-2-A Automation Oven

The automation feature in the TVO-2-A allows the operator to manually operate the vacuum system, or use profiles in the Watlow controller to operate the vacuum system in the oven. The vacuum system includes an electro-pneumatic isolation valve installed between the oven & vacuum pump; This valve is controlled by an event output in the Watlow PM9 Plus controller. The operator can turn this event on by pressing a button on the controller. The valve will open and the vacuum pump will evacuate the oven down to the ultimate pressure rating of the vacuum pump. When the process is complete, the operator turns off the vacuum event and the oven will automatically backfill to 500 Torr. This backfill limit is controlled by a set point in the digital vacuum gauge controller and can be adjusted by the operator if a different level is desired. It can also be set to not auto-backfill if desired. The TVO-2-A can also be programmed to perform this function in a recipe in conjunction with heating allowing multiple pump purge & heating cycles to help remove moisture from the product without the need for the operator to control the oven.

Includes upgraded Inficon (1000 Torr to 0.1 mTorr) Full Range Digital Vacuum Gauge to allow for reading the full ultimate vacuum of the process/pump.

Standard Features

Glass Viewing Window
Inert gas backfill Connection
Stainless Steel Interior
Aluminum Shelves
Powder Coated Steel Exterior
Digital Integrated Over Temperature Limit
Spare KF25 Access Port
Recipe-based PID Temperature Control. 4 Ramp and Soak recipes with up to 40 total steps.
Upgraded Inficon Full Range Vacuum Gauge
UL 61010-1, EN 61010-1, CSA 61010-1, CE, SAFETY CERTIFICATIONS
Analog Outputs

Customized to Meet Your Specific Application

Cascade TEK understands that every requirement is unique. Ask about modifying our ovens to meet your exact requirements. Popular modifications include:

• Additional Serial communication capabilities including Modbus® RTU, EtherNet/IP™, Modbus® TCP, PROFIBUS DP,
DeviceNet™ and J1939 CAN bus
• Additional access ports for feedthrough and power connections
• Additional shelves or custom racks to maximize oven capacity
• Also available in 220V configurations
• NIST traceable calibrations
• Factory Acceptance Testing (FAT)

Vacuum pumps are also very application specific.  We help determine the correct pump to meet your exact requirements. Let us help you choose the correct vacuum pump and connection kit:

• See our favorite vacuum pumps
• See our list of connection kits and other vacuum accessories

• Before 2024 upgrade to Watlow PM9 Plus unit controllers from the discontinued Watlow EZ Controllers product manual are located on our resources page

Product Specifications


1.67 cu.ft. (47.2 Liters)

Interior Dimensions (W x D x H)

12''x 20''x 12'' (304 x 508 x 304 mm)

Exterior Dimensions (W x D x H)

20.2" x 34.9" x 27.1" (513 x 887 x 689 mm)

Unit Weight

182.2 lbs (82.6 kgs)

Shipping Weight

224 lb (102 kg)


3 standard, 3 total

Access Port

1" vacuum port (KF-25)


2-Year Limited Warranty



NEMA Plug Supplied

NEMA 5-15P

Temperature Range

10°C above ambient to 220°C

Heat-Up Time

120 minutes to 150ºC

Temperature Uniformity

±6% of Set Point

Vacuum Range

1100 to 0.1 mTorr

Vacuum Gauge

1000 Torr – 0.1 mTorr

Safety Certifications

UL 61010-1, EN 61010-1, CSA 61010-1. CE