Heat can easily damage delicate samples by oxidising powders, breaking down active compounds or trapping moisture in the centre of a batch. A vacuum oven overcomes this problem by reducing the pressure inside the chamber, which allows water and solvents to evaporate at temperatures far below their normal boiling points—for instance, water boils near 20 °C at about 23 mbar. The result is gentle, controlled drying that leaves materials stable and free of residues, making the technique ideal for powders, biological specimens, pharmaceutical intermediates and any other heat-sensitive substances that would otherwise degrade or oxidise in a conventional oven.
What Is a Vacuum Drying Oven Used For?
A vacuum drying oven removes moisture and volatile content gently, with minimal thermal stress on the sample. Common uses include:
- Moisture content determination
- Drying of heat-sensitive powders, granules and chemical compounds
- Removal of residual solvents
- Degassing (out-gassing) of solids
- Dry sterilisation and purification of materials
- Sample preparation for analytical testing and R&D
Because the chamber runs under reduced pressure, drying is faster at lower temperatures and leaves almost no residue on the sample.
Vacuum Oven Applications
- Pharmaceutical and biotech: API and intermediate drying, residual solvent removal
- Universities and research institutes (IITs, NITs, R&D labs): Civil and Mechanical engineering, Chemistry department for thesis work, sample preparation, material science
- Battery and electronics: electrode and component drying, out-gassing
- Polymers, chemicals and coatings: moisture-sensitive material, purification
- Food, nutraceutical and herbal: drying heat-sensitive extracts and powders
- Quality control labs: moisture content determination, dry sterilization
Detailed Technical Description
- Design: Our vacuum ovens are designed in rectangular, square and round chamber shapes as required.
- Volume: From small to large capacity requirement we make vacuum ovens from 12 liters to 225 liters; we also make customized dimension to meet specific requirements.
- Construction: Rugged construction and leak proof performance are prime requirements of a vacuum oven; therefore, we make these vacuum ovens with thick gauge of stainless steel sheets (SS304 or SS316) fabricated and jointed with arc welding and nicely designed. Exterior cabinet is usually made of powder coated GI sheet supported with high density glass wool insulation. We also make GMP vacuum ovens having both inner and outer made of stainless steel.
- Vacuum Level: The vacuum is achieved -760mmHg (133 Pascal (Pa) roughly 1.33 mbar) using oil filled vacuum pump. Standard vacuum oven units are equipped with dial type analog vacuum gauge of 0-760mmHg range. As an option, we also fit digital vacuum gauge and controller for precise accuracy. Vacuum intake and release valves are fitted on either side of unit.
- Door: The door is also made of thick gauge of steel with toughened glass window and durable pull action clamp to close the door. With silicone rugger gasket at chamber, the door ensures leak proof performance even at high vacuum level.
- Temperature: The temperature range of a standard vacuum oven is ambient+10°C to 200°C, which is controlled through microprocessor based PID temperature controller having dual display of set value (SV) and process value (PV). It is supported with PT100 (Class A) temperature sensor.
- Options:We offer several optional accessories with our vacuum ovens such as Oil filled or Oil free vacuum pumps, data recording, digital timer and caster wheels with brake at bottom. We also equip vacuum oven with highly advanced PLC based HMI controller which not only offers temperature settings but also provides vacuum control, digital vacuum display and data recording with USB interface to transfer data into pen drive
NOTE: "If your application doesn't need a vacuum environment, our hot air oven may be a more economical choice." You may also browse our laboratory oven category for more related products
FEATURES & BENIFITES
- Two chamber shapes: Rectangular and cylindrical (round) designs
- Wide capacity range: 12L to 225 liters, plus custom sizes on request
- Deep vacuum up to 760 mmHg (133 Pa)
- Choice of vacuum gauge: Analog or digital vacuum gauge types
- Temperature up to 200°C, with a 250°C option for special applications
- Accurate temperature control: microprocessor-based PID controller with PT100 sensor
- Corrosion-resistant chamber: SS 304 as standard, SS 316 on request
- Leak-proof sealing: thick, high-temperature silicone rubber gasket
- Flexible vacuum pump options: oil-filled or oil-free vacuum pumps
- Made in India and supplied across the country and for export
Rectangular Vacuum Oven
| Model |
Dimensions (W x D x H) |
Dimensions (W x H x D) |
Volume |
| STXRVO28 |
12 x 12 x 12 Inch |
300 x 300 x 300 mm |
28 Liters |
| STXRVO45 |
14 x 14 x 14 Inch |
355 x 355 x 355 mm |
45 Liters |
| STXRVO95 |
18 x 18 x 18 Inch |
455 x 455 x 455 mm |
95 Liters |
| STXRVO125 |
18 x 18 x 24 Inch |
455 x 455 x 609 mm |
125 Liters |
| STXRVO225 |
24 x 24 x 24 Inch |
609 x 609 x 609 mm |
225 Liters |
Cylindrical Vacuum Oven
| Model |
Dimensions (Dia. x L) |
Volume |
| STXCVO12 |
250 x 250 mm |
12 Liters |
| STXCVO14 |
250 x 300 mm |
14 Liters |
| STXCVO21 |
300 x 300 mm |
21 Liters |
| STXCVO50 |
400 x 400 mm |
50 Liters |
Common Technical Specifications for all models
| Chamber design |
Round and Rectangular |
| Vacuum range |
Up to -760 mmHg (133 Pascal (Pa) roughly 1.33 mbar) |
| Temperature range |
Ambient+10°C to 200°C |
| Temperature sensor |
PT100 |
| Temperature controller |
- Digital PID controller
- LED Display of SV & PV
|
| Inner chamber |
Hermetically welded stainless steel 304 sheet |
| External cabinet |
Powder coated GI sheet |
| Door |
Solid door with clamp & toughened glass window |
| Gasket |
High temperature resistant silicon rubber gasket |
| Shelves |
Removable SS shelves |
| Vacuum fittings |
Open / Close type Vacuum and exhaust valves |
| Standard fittings |
- Mains on/off switch
- Vacuum pump on/off switch
- Electric socket for vacuum pump
|
| Power supply |
220 Volts 50Hz |
| Optional |
- Temperature up to 250°C
- Temperature data recording
- SS316 construction of inner chamber
- All SS 304 construction (GMP)
- Digital vacuum control through solenoid valves
- Timer 9999 mins
- Oil filled vacuum pump
|
Benchtop Vacuum Oven
| Model |
Volume |
Inner Dimensions |
External Dimensions |
Temperature Control |
| STXRVO53 |
53 Liters |
415*370*345 mm |
730*560*550 mm |
PID Controller with in-built timer 9999 minutes |
| STXRVO90 |
90 Liters |
450*450*450 mm |
765*640*655 mm |
PID Controller with in-built timer 9999 minutes |
Frequently asked questions
- What is a vacuum oven used for?
It dries heat-sensitive, oxygen-sensitive or moisture-sensitive materials at low temperature by reducing the pressure in the chamber. Common uses are moisture content determination, solvent removal, out-gassing and purification.
- What is the difference between a vacuum oven and a hot air oven?
A hot air oven dries by circulating hot air at normal pressure, so samples see higher temperatures and oxygen. A vacuum oven removes most of the air first, so drying happens at lower temperatures with less oxidation.
- What temperature can a laboratory vacuum oven reach?
Our standard ovens run from ambient +10°C up to 200°C; 250°C version is available as an option.
- Which capacities do you offer?
Rectangular models range from 28 to 225 litres, and cylindrical models from 12 to 50 litres. Custom sizes can be made on request.
- What materials are available for the chamber?
SS304 as standard, SS316 for improved corrosion resistance, and an we also make all-stainless-steel vacuum ovens in GMP models for regulated environments.
- Do you supply the vacuum pump?
Yes. We supply oil-filled or oil-free vacuum pumps, depending on your application and how clean the vacuum needs to be.
- Can the oven record data?
Yes. Optional temperature data recording is available, and the PLC/HMI version supports vacuum control, digital display and USB data transfer.
- Can I dry solvents in a vacuum oven?
Yes, but safety depends on the solvent. Flammable or corrosive solvents may need a solvent trap, a chemical-resistant pump, or an alternative design. Please consult our engineers before ordering.
- Do you make custom-size vacuum ovens?
Yes. Share your required dimensions, shelves, ports or temperature, and our team will design to your requirement.
- Do you deliver across India and export?
Yes. We supply across India and to international customers from Middle East countries, Africa, Malaysia, Philippines, Nepal, Bhutan and Bangladesh etc.
- How do I get the vacuum oven price?
Fill “Submit Your Request” form, send us email or call us. Share your sample type, size and temperature requirement, and we’ll send a detailed quotation with price with other important details.
