The Circulaire® Downflow Workbench containment system is designed to protect operators from potentially hazardous powders, dust, fumes, or vapours during laboratory and industrial processes. Using recirculating airflow technology, the workbench ensures contaminants are drawn away from the breathing zone, delivering safe, efficient working conditions.
Product Description.
The Circulaire® Downflow Workbench is an advanced operator protection solution, expertly engineered for handling powders, chemicals, and other particulate substances in laboratories and industrial environments.
Each unit is custom-built to order, ensuring that your exact application, process flow, and workspace requirements are seamlessly integrated into the final design. Whether it’s a unique size, filtration type, or specific operational feature — the Downflow Workbench is made for your environment, processes, and safety.
The Downflow Workbench operates using a high-efficiency downward airflow system. Ambient air is pulled downwards through the perforated work surface by an internal fan, drawing airborne particles or vapours away from the user and through a filtration system.
Filtered air is safely recirculated back into the room, eliminating the need for ductwork or external extraction systems, while maintaining clean air standards around the operator.
- Washdown Facilities
- Water Supplies
- Electrical Height Adjustment.
- Outlet HEPA Filter for Particulate Control
Solution
Our Class 2 Biological Safety Cabinets keep your team safe while handling potentially hazardous materials.
Independently type tested and approved to BS EN 12469 : 2000 by the UK’s leading authority on BioSafety Cabinets, the Health Protection Agency at Porton Down.
Manufactured to the highest quality standards, our state-of-the-art biosafety solution is equipped with H14 HEPA Filters to create an ISO Class 5 Clean Environment and features an intuitive control system, energy-efficient LED lighting, controlled airflow and UV sterilisation functionality.
Class 2 Biological Safety Cabinets are suitable for work with microbiological agents assigned to Biosafety Levels 1, 2, 3 or 4.
Operation
The Class 2 Biological Safety Cabinet utilises a combination of inflow and downflow air to create a sterile work environment. Air passes through HEPA filters before entering the work area, protecting samples and operators from airborne contaminants. Exhaust air is filtered again before release, maintaining a safe laboratory environment.
Type A2
In a Recirculating Type A2 MSC air is drawn in through the front aperture, providing operator protection. The inflow air mixes with the downflow air as it enters the front intake grille and passes through the plenum where the air is split into exhaust systems.
- 70% of the air is recycled and pushed back into the Work Area through the downflow HEPA Filtration, providing product protection.
- 30% is returned through the Exhaust Air HEPA Filter back into the laboratory environment.
Type C1
A Type C1 MSC utilises the same airflow pattern as a Type A2. The addition of an Anti-Blowback Valve directs 30% Exhaust Air through an External Duct System.
Carbon Exhaust System
If chemicals are used a Carbon Filtered Exhaust system may be installed after or as part of the Exhaust HEPA Filter, making a Type A2 Cabinet suitable for the handling of hazardous chemicals.
Applications
- Microbiology: Handling of cultures and specimens.
- Pharmaceutical Research: Safe manipulation of hazardous drugs.
- Clinical Testing: Containment of infectious agents.
- Biomedical Laboratories: Protection during cell culture work.
Options
- Base Stand | with Lockable Castors | with Vented Under Cupboard
- Spillage Tray | Polypropylene | 316 Stainless Steel
- Rear Stainless Steel Scaffolding System
- Services | Water | Gas
- Cable Entry Points
- Double Electrical Sockets
- Enclosure | Stainless Steel | Polypropylene | PVC
Technical Specification.
| DFB1000 | DFB1200 | DFB1500 | DFB1800 | DFB2000 | |
|---|---|---|---|---|---|
| External (W x D x H) | 1000mm x 750mm x 900mm | 1200mm x 750mm x 900mm | 1500mm x 750mm x 900mm | 1800mm x 750mm x 900mm | 2000mm x 750mm x 900mm |
| Ventilated Area (W x D) | 800mm x 500mm | 650mm x 450mm | 700mm x 500mm | 1000mm x 500mm | 600mm x 450mm (2no.) |
| Primary Filter | Large Capacity Activated Carbon or H14 HEPA Filter – 99.97% efficient at 0.3um | ||||
| Sink Dimensions | N/A | 400mm x 350mm x 250mm | |||
*Also Manufactured to Custom Size Requirements.
Product Catalogue
Features & Benefits.
Activated Carbon Filtration
Removes hazardous fumes and vapours, protecting the user without external ducting.
Custom Design and Dimensions
Custom-made workbenches, allowing for precise fit and functionality within your space.
Energy Efficient
Recirculating air lowers energy consumption and operational costs.
BS 7989 : 2001
Fully compliant for Filtration Fume/Particulate Cupboards and COSHH regulations.
Integrated Utilities
Built-in sinks, water supplies, and electrical height adjustment, streamlining workflows.
Perforated Work Surface
Allows even airflow, ensuring contaminants are drawn away from the operator efficiently.
