Airlock VHP Sterilization
An airlock / buffer room with an integrated vaporized hydrogen peroxide generator that biodecontaminates the outer surfaces of materials before they enter a Grade A/B critical zone — sized for loads too large or heavy for a conventional pass box.
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Overview
The Fenggu Airlock VHP Sterilization system integrates a vaporized hydrogen peroxide (VHP) generator into an interlocked material-transfer room, biodecontaminating exposed material exteriors to reduce contamination introduced during transfer from Grade C/D areas toward Grade A/B critical areas. It performs the function of a VHP pass box while accommodating loads too large or heavy for a conventional pass box. Suitable loads include the clean, dry items used in aseptic manufacturing — outer packaging of packaging materials and raw materials/excipients, instruments, components and environmental-monitoring equipment. The cycle runs automatically in four stages — temperature/humidity preparation (above 25 °C, below 30% RH), conditioning, biodecontamination and aeration — reducing residual VHP to below 1 ppm before the room is opened.
Key Features
- SUS304 stainless-steel construction; also functions as a conventional material airlock; durable and easy to clean
- Interlocked biosafety airtight doors designed so the doors on both sides cannot open at the same time
- All supply and exhaust air passes through H14 HEPA filters
- Real-time monitoring of chamber temperature, humidity, pressure and H2O2 concentration
- Status indicator lights for each stage of operation
- Siemens PLC control system with real-time printing capability
- Controlled by the building management system (BMS) between cycles; switches to the dedicated VHP cycle mode during biodecontamination
Technical Specifications
| Cycle temperature | 25–35 °C | Cycle humidity | 40–60% RH |
|---|---|---|---|
| VHP concentration | 300–700 ppm | Residual VHP after aeration | ≤ 1 ppm |
| Full cycle time | < 60 min | Aeration time | ≤ 1 h |
| Sporicidal efficacy | ≥6-log reduction (subject to validation) | Noise | ≤ 75 dB |
| Exterior material | SUS304 | Internal piping | SUS316L |
| Air filtration | H14 HEPA | Control | Siemens PLC, BMS-linked |
Applications
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Tell us the buffer-room size, the connected cleanroom classifications and material types, and our engineers will recommend a suitable airlock VHP configuration.
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