Benchtop Class B Vacuum Autoclave

What is the Benchtop Class B Vacuum Autoclave?

A front-loading benchtop autoclave with fractionated pre-vacuum and vacuum drying that meets EN 13060 Class B cycles. It sterilizes wrapped, hollow and porous loads of 16 to 100 L in clinical, dental and research settings.

Overview

The Class B autoclave adds a vacuum pump and a steam generator to a front-loading benchtop chamber. Before steam enters, the pump performs several pressure pulses so that air is removed from wrapped packs, porous materials and hollow instruments with narrow lumens. After the hold at 134 °C, typically 3.5 to 18 minutes, a post-vacuum stage dries the load. The design meets the performance classes defined in EN 13060, which requires tests with hollow loads, porous loads and wrapped items, and it includes a Bowie-Dick or helix test cycle. Chambers range from 16 to 100 L, and features include a printer or data port, water quality monitoring, and automatic water filling. The system is more expensive and complex than gravity units, but it gives confidence for instruments used on patients.

How does it work?

An autoclave sterilizes by exposing items to saturated steam under pressure. At 103 kPa gauge, steam reaches 121 °C, and at about 205 kPa it reaches 134 °C. Steam condenses on cooler surfaces, releasing latent heat that denatures proteins and destroys microorganisms far faster than dry heat at the same temperature. A cycle has three main phases: air removal, sterilization hold and exhaust or drying. Gravity-displacement units push air out through a drain by steam flow, while pre-vacuum units use a vacuum pump to remove air before steam admission, which penetrates porous loads and hollow instruments. A steam generator or jacket supplies steam, a controller reads temperature and pressure sensors, and safety valves, door interlocks and overpressure devices protect users. Validated hold times typically range from 3 to 30 minutes depending on load and temperature.

What are the key features?

• Fractionated pre-vacuum removes air from wrapped, porous and hollow loads.
• Vacuum drying stage produces dry packs ready for storage.
• Cycles designed to meet EN 13060 Class B requirements.
• Integrated Bowie-Dick or helix test program.
• Printer, USB or network port for batch records.
• Water quality and level monitoring with automatic filling.

What are the technical specifications?

A typical benchtop class b vacuum autoclave configuration offers chamber volume of 16-100 L, sterilization temperature of 121 and 134 °C, working pressure of Up to 0.23 MPa, air removal of Fractionated pre-vacuum (3 pulses), drying of Vacuum drying, 10-30 min and vacuum level of Down to -90 kPa. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Benchtop Class B Vacuum Autoclave is used in dental and clinical instruments, wrapped surgical packs, hollow instrument sterilization and research and veterinary clinics. Across the wider Autoclaves class, laboratories also deploy it for microbiology media sterilization, laboratory waste decontamination and glassware and instrument sterilization.

Which standards and certifications apply?

Relevant standards and methods include EN 13060, EN 285, ISO 17665-1, ISO 11138, ASME BPVC Section VIII, GB 8599 and EN 61010-2-040. Certification candidates for this model are CE, EN 13060 type test and ISO 13485 manufacturing; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Install the autoclave on a level floor with clearances specified by the maker for service and ventilation, and provide a drain, water supply and electrical circuit sized to the heater. Use distilled, deionized or conditioned water as specified to limit scale. Pressure vessels are regulated in most countries, so arrange registration, periodic inspection and operator training. Qualify the unit with installation and operational checks, then validate each load type using thermocouples and biological indicators such as Geobacillus stearothermophilus spores. Perform Bowie-Dick or helix tests daily on vacuum models. Inspect door seals, gaskets and safety valves regularly, descale the chamber and steam generator, and calibrate sensors annually. Never autoclave sealed containers, solvents or bleach-containing waste.

How do I select the right Benchtop Class B Vacuum Autoclave?

Select a Class B benchtop autoclave when wrapped, hollow or porous loads must be sterilized and dried with documented performance. Gravity vertical units suit liquids and glassware. Specify chamber volume, EN 13060 class, drying, data output and water quality requirements.

How does it compare with other Autoclaves variants?

Match the autoclave to the load and the level of assurance required. Liquids, glassware and waste can be processed in gravity cycles, while wrapped instruments, porous textiles and hollow devices need pre-vacuum to remove air. Select chamber volume from the largest load and throughput, typically 18 L for small benchtop units to 1000 L or more for floor-standing models. Decide between top-loading vertical units for economy, front-loading horizontal units for ergonomics, and double-door pass-through units to separate clean and contaminated zones. Check cycle options, such as liquid, waste and dry cycles, printer or data logging, and validation support. Confirm the pressure vessel code, steam source and water quality, and compare electrical or steam supply requirements and installation space, including door swing and drainage.