Quick Answer
A double door autoclave is a steam sterilizer built with two doors. You load from one side, and the sterilized goods come out from the other. Nothing travels back through the dirty side, which is the key feature. Bionics Scientific has been building autoclaves for 35 years, and our range covers double-door, vertical, fully automatic, and industrial units.
- Used in: pharma plants, biotech labs, hospitals, cleanrooms, food labs
- Common cycles: 121 °C for 15 to 20 minutes, or 134 °C for 3 to 10 minutes
- Chamber volume: roughly 100 L up to several thousand liters
- Controls: microprocessor or PLC, with a printer or data export
What a Double Door Autoclave Actually Does
Steam under pressure kills bacteria, spores, fungi, and viruses. Any autoclave does that. What sets this one apart is the wall it sits in. The loading door opens into a general work area, and the unloading door opens into a clean room or a sterile store. The two doors are interlocked, so they can never stand open together.
Auditors like this layout because the process itself blocks mix-ups. A tray cannot be picked up from the wrong side, since the wrong side has no door. That is why pharmaceutical plants, tissue culture units, and hospital sterile supply departments ask for it by name.
How the Cycle Runs
- Staff load media, glassware, instruments, or waste on the non-sterile side and shut the door.
- A vacuum pump or steam flush pulls out trapped air. Air pockets stop steam from reaching the load, so this step matters more than most buyers expect.
- Steam fills the jacket and chamber until the set temperature is reached.
- The sterilization phase holds that temperature for the programmed time.
- Steam is exhausted, and a vacuum dries the load.
- The sterile-side door unlocks only once chamber pressure is safe.
Double Door vs. Vertical Autoclave
People who type “vertical autoclave machine” into a search bar are often really deciding between two layouts, so let us be direct about it.
A vertical autoclave loads from the top. It fits small labs, clinics, and field setups where floor space is tight. A fully automatic vertical autoclave adds auto fill, auto cycle, and auto exhaust, which saves operator time, but it still has a single opening. A vertical high-pressure steam sterilizer autoclave stays a sensible pick for media preparation and small instrument loads.
A double door model is horizontal and made for volume plus separation. If you run more than a few baskets a day, or your quality system demands a validated barrier between zones, choose the double door format.
What Goes Into a Bionics Scientific Double Door Autoclave
- SS 316L inner chamber, SS 304 outer cladding
- Pressure vessel designed with margin above its working pressure
- Electric heating or a steam generator, whichever suits your site
- Door interlocks, safety valve, over-temperature cut-off, and low-water cut-off
- Fractional vacuum pre-conditioning for porous loads
- Cycle printer, USB, or software export for audit records
- Trolleys and racks made to your tray size
Double Door Autoclave Specifications
Our double-door autoclaves are made for dependable steam sterilization in pharmaceutical plants, hospitals, and laboratories. Each unit combines a stainless steel chamber, automatic controls, and layered safety protection.
| Parameter | Typical Specification |
| Type | Horizontal, double door |
| Chamber capacity | 100 to 3000 liters |
| Chamber material | SS 316L stainless steel |
| Outer body | SS 304 or mild steel |
| Operating temperature | 121 °C to 134 °C |
| Working pressure | Approx. 15 to 30 psi |
| Heating system | Electric or steam |
| Control system | Microprocessor or PLC |
| Door mechanism | Safety interlocked |
| Safety features | Pressure relief valve, alarms |
| Applications | Pharma, hospitals, laboratories |
Specifications change with model, capacity, and customization.
Temperature, Pressure, and Time Chart
Sterilization time depends on the temperature you pick, what is inside the chamber, and the cycle selected.
| Temperature | Pressure (approx.) | Holding time | Typical load |
| 115°C | 10 psi | 30 min | Selected culture media |
| 121°C | 15 psi | 15 to 30 min | Glassware, instruments |
| 126°C | 20 psi | 10 to 20 min | Compatible textile loads |
| 134°C | 30 psi | 3 to 18 min | Surgical instruments |
Pressures are approximate gauge values. Holding times are illustrative and need validation for your load. Total cycle time also includes heating, air removal, and cooling or drying.
Where These Machines Earn Their Place
- Pharma and biotech: terminal sterilization, vials and stoppers, material entering a cleanroom
- Hospitals and CSSD: instrument sets, linen, dressing drums
- Research and tissue culture labs: media, plasticware, biohazard waste
- Food and beverage: microbial test labs and container validation
- Industry: as an industrial autoclave for composites, rubber, and large bulk items
15 Things to Check Before You Buy
- Chamber size against your real daily batch
- Load type: liquids, wrapped goods, waste, or porous items
- Vacuum or gravity air removal
- SS 316L chamber grade
- Pressure vessel design code and test certificate
- How good the interlock between the two doors is
- Steam source: built-in generator or plant steam
- Validation help: IQ, OQ, and PQ
- Data logging and 21 CFR Part 11 readiness if you need it
- Safety devices and emergency stop
- Spare parts availability in your country
- Installation and operator training
- Warranty and annual maintenance terms
- Utilities: power, water, drain, compressed air
- Ten-year running cost, not only the purchase price
Autoclave Drum Price: Why There Is No Single Number
Plenty of buyers search for autoclave drum price, and a fair answer is that one figure does not exist. Chamber volume, steel grade, steam generator, vacuum system, PLC level, door type, and paperwork all move the cost. A compact vertical unit sits far below a validated double door system. Share your load details with us, and we will quote for what you actually need.
Shipping to Your Country
Bionics Scientific supplies autoclaves to laboratories and manufacturers in the United States (USA), United Kingdom (UK), United Arab Emirates (UAE), Saudi Arabia, South Africa, Canada, Australia, Singapore, Malaysia, the Philippines, Indonesia, Kenya, Bangladesh, Nepal, Qatar, Oman, Kuwait, Bahrain, Vietnam, Thailand, Tanzania, Ghana, Sri Lanka, and New Zealand. We handle export packing, voltage matching, and shipping documents for each destination.
Why Buyers Choose Bionics Scientific
We have manufactured laboratory and industrial equipment for 35 years. Each autoclave is built in our own facility, pressure tested, and inspected before it ships. Our engineers help with chamber sizing, cycle design, and room layout, and our service team supports commissioning and later care. You deal with the maker directly, so lead times and pricing stay clear.
Frequently Asked Questions
For what purpose do I need a double door autoclave?
It is intended for sterilization of media, instruments, glassware, and wastes in separate chambers. Most popular among pharmaceutical companies, hospitals, and cleanrooms.
How is it different from a vertical autoclave?
The vertical autoclave has a top-loading chamber with a volume not exceeding 80-90 liters. The double-door unit is horizontal, has two interlocked doors and higher chamber capacity.
At what temperature does an autoclave work?
121 °C and 134 °C are standard temperatures used in autoclave cycles. Heat-sensitive materials undergo sterilization at 115°C cycles.
How long does one cycle last?
The holding time at 121°C is 15-20 minutes. Heating and drying times added to it will result in the total cycle time from 45 to 90 minutes.
Can two doors be opened simultaneously?
No. Electrical and mechanical interlocking allows you to open just one door and prevents contamination of sterile chamber.
What volumes are available?
Capacities start from 100 liters up to several thousand liters, and custom dimensions are also possible.
Do you produce vertical autoclaves too?
Yes. In addition to double-door autoclaves, our product range includes vertical, fully automatic, and industrial autoclaves.
Request a Quote Today
Send us your chamber size, load type and country, and Bionics. Scientific will recommend the right double door or vertical autoclave with a clear quotation. Contact our team today for specifications, drawings, and pricing.
