Dry Heat Sterilizer

The sterilizer heats air (typically 160–180°C / 320–356°F, up to 250°C) and maintains it for a set duration. Heat is absorbed by the outer surface of items and transfers inward through conduction, denaturing microbial proteins, oxidizing cellular components, and destroying the organisms’ ability to survive and reproduce. Hot air is circulated by a dynamically balanced fan/impeller, with fresh air entering through a HEPA filter module.

Temperatures typically range from 160°C to 180°C (up to 250°C maximum). A common recommended cycle is 170°C for 60 minutes. Exact settings depend on the load and are controlled via a digital controller and timer (±2°C accuracy).

Unlike steam autoclaves that use moisture, dry heat sterilization uses only dry air. This prevents corrosion, dulling, or damage to sharp instruments, glassware, metal tools, powders, and oils that would be ruined by steam or moisture.

It is ideal for heat-resistant, moisture-sensitive items such as dental burs, surgical blades, glassware, metal tools, carbon steel instruments, powders, oils, anhydrous substances, ampoules, and vials.

Key features include a compact cGMP model; inner walls of Stainless Steel 316 and outer walls of Stainless Steel 304; dual interlocked doors (one for sterile/filling area, one for non-sterile/washing area); ‘A’ grade mineral wool insulation; dynamically balanced fan for uniform temperature; optional PLC-based automatic operation; HEPA filtration; and temperature recording via circular chart recorder.

The sterilizer has two pneumatically interlocked doors—one opening into the sterile (filling) area and the other into the non-sterile (washing) area. Ampoules/vials are washed and loaded in the non-sterile side, sterilized, then unloaded into the sterile side to maintain separation of areas.

Advantages include no corrosion or rust (ideal for sharp tools), suitability for heat-stable materials like glass, metal, powders, and oils, low maintenance (no water, steam generators, or complex drainage), excellent penetration for complex geometries, and an environmentally friendly process that uses only electricity and air.

It is used in the pharmaceutical, nutraceutical, herbal, Ayurvedic, biotech, cosmetic, and chemical industries for sterilizing heat-resistant instruments and materials.

Thoroughly clean and dry all instruments before loading; avoid overloading to ensure proper air circulation; use manufacturer-recommended temperature and time cycles; regularly monitor with biological and chemical indicators; and store sterilized items in a clean, dry environment until use.