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Reverse Laminar Airflow Unit

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Contained Airflow for Powder Handling, Sampling & Dispensing in Clean Zones

In pharmaceutical and chemical industries, handling powders or active ingredients poses a risk of contamination and cross-contamination. Reverse Laminar Airflow Units (RLAUs) are designed to safely contain airborne particulates during critical processes like material sampling and dispensing.

Unlike laminar flow units that push clean air outward, RLAUs draw air away from the operator and product, ensuring that particles released during handling are captured and filtered immediately. The system works by maintaining a reverse airflow pattern, drawing contaminated air through pre-filters and HEPA filters, then recirculating or exhausting the clean air.

Dyna’s RLAUs are ideal for API handling, powder sampling, chemical dispensing, and weighing operations. Built with GMP-compliant stainless steel, integrated lighting, digital airflow monitoring, and optional exhaust ports, these units offer high protection for operators, products, and the environment.

Sampling/Powder Dispensing Booth (RLAF)
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Key Features:

  • Class 100 Work Area – Provides ISO 14644-compliant clean air for the operator and the environment. Triple-Stage Filtration – H14 HEPA filter, F5 and F7 pre-filters for maximum capture.
  • Vertical Reverse Airflow – Effectively contains and removes hazardous dust at source.
  • Compact, Ergonomic Design – Space-saving, with optional worktable and side panels.
  • Feather Touch Switches – Effortless operation for all controls.
  • Digital Differential Pressure Gauge with Alarm – Alerts for filter condition and maintenance.
  • Energy Efficient LED Lighting – 500 Lux illumination for safe, clear visibility.
  • Internal Auxiliary Sockets – Power for equipment within the work area.
  • PVC Curtains – Containment curtains provided for added isolation and cleanliness.

Specifications:

Parameter Value
Air Cleanliness Class 100
Velocity 90 FPM ± 20%
Material of Construction Exterior: SS 304 (Optional: SS 316); Side Panels: SS 304 with PUF insulated
Main Filter Minipleat HEPA, Class H14
Pre Filter Class F5 & F7
Filter Efficiency HEPA 99.997% @ 0.3 µm; Intermediate 95% @ 5 µm; Pre 90% @ 10 µm
Noise (dB) 67 ± 2
Lighting (Lux) >500 (LED)

Applications:

  • Pharmaceutical API Sampling – Ensures safe handling of active powders.
  • Chemical Weighing & Dispensing – Avoids cross-contamination and airborne exposure.
  • Microbiology & Biotech – Prevents sample contamination during handling.
  • Cosmetics & Nutraceutical Production – For precise and safe ingredient dispensing.
  • Powder Handling in R&D – Ensures operator safety during formulation.
  • Bulk Material Sampling – Ideal for raw material testing in controlled zones.

Models:

Model Air Cleanliness Interior Dimensions (WxDxH) Exterior Dimensions (WxDxH) Power Supply
DRLAF 2*2 Class 100 710 × 725 × 1830 mm 760 × 1350 × 2200 mm 220–240 V, 50 Hz
DRLAF 3*2 Class 100 1015 × 725 × 1830 mm 1065 × 1650 × 2200 mm 220–240 V, 50 Hz
DRLAF 4*2 Class 100 1320 × 725 × 1830 mm 1370 × 1350 × 2200 mm 220–240 V, 50 Hz

Why Choose Dyna Reverse Laminar Airflow Units?

  • Proven design for operator, product, and environmental protection.

  • Available in custom sizes and flexible configurations.

  • Integrated with pre-filters, HEPA filters, and optional exhaust ducting.

  • Manufactured in compliance with GMP and ISO 14644 standards.

  • Trusted by leading pharma companies, labs, and cleanroom integrators.

Product Variants:

Sampling Booth

Sampling/Powder Dispensing Booth (RLAF)

Sampling Booth

Designed for safe and sterile sampling of raw materials or powders in quarantine and QC areas.

  • Rear perforated airflow panels.
  • ISO Class 5 airflow at the sampling point.
  • Optional exhaust HEPA for powder recovery.

Dispensing Booth

Sampling/Powder Dispensing Booth (RLAF)

Dispensing Booth

Used for accurate weighing and transfer of materials under unidirectional reverse airflow.

  • Built-in load cell integration (optional).
  • Exhaust duct connection for hazardous powder removal.
  • Anti-vibration working platform.

Frequently Asked Questions (FAQs)

What is the purpose of a reverse laminar airflow unit?

It draws air inward to contain airborne powders and protect operators during sampling or dispensing activities.

Can these units be ducted to the outside?

Yes, they can be configured with exhaust HEPA filters and external ducting as per your cleanroom design.

Do they offer ISO Class 5 cleanliness?

Yes, the working zone is ISO Class 5 compliant, with multiple filtration stages.

Are Sampling and Dispensing Booths different?

Yes. Sampling booths are for raw material inspection; dispensing booths offer weighing and controlled transfer, often with more airflow adjustments.

Looking for safe and compliant powder handling workstations?

Choose Dyna Reverse Laminar Airflow Units
for containment-certified sampling and dispensing in cleanrooms.