Laminar Air Flow is a controlled system that supplies a continuous stream of clean, particle-free air in a uniform direction. The air passes through HEPA filters (99.99% efficiency at 0.3 μm) to eliminate contaminants such as dust, microorganisms, and airborne particles.

This unidirectional airflow creates a Class 100 (ISO 5) clean environment, making LAF systems essential in laboratories, pharmaceutical manufacturing, biotechnology, and electronics assembly, where product protection and sterility are critical.

Vertical Laminar Air Flow

The most common type of laminar air flow, in which air travels vertically downwards towards the work surface. The blower and HEPA filters are positioned at the top of the unit, ensuring a continuous stream of particle-free air.

This design is generally preferred for applications requiring sterile conditions, such as microbiological testing, pharmaceutical preparations, and tissue culture work.

Advantages

  • Superior Contamination Control: Vertical airflow ensures that any particles generated in the workspace are pushed downward and away, minimizing risk of product contamination.

  • Operator Safety (to an extent): Since air does not blow directly towards the operator’s face (as in HLAF), it provides better comfort and reduced exposure.

  • Flexible Work Surface: Allows placement of larger instruments without significantly disrupting airflow.

  • Preferred for Sterile Work: Provides cleaner conditions compared to HLAF in sensitive operations.

Horizontal Laminar Air Flow

HLAF units are spacious in design, with the HEPA filter positioned at the back of the cabinet. Clean air flows horizontally from back to front, ensuring a particle-free workspace. The pre-filter beneath the work surface draws in ambient air, while the blower at the bottom maintains consistent airflow.

This system is ideal for applications where the main priority is product protection from contamination, though it does not safeguard the operator.

Optional Accessories

  • UV light with hour meter

  • SS 304 cock for gas and air

  • Foldable polycarbonate front door

  • Clean-down timer with hold indicator

  • Flame-proof fittings

Advantages

  • Spacious Work Area – Provides a wide, unobstructed workspace, comfortable for handling samples and instruments

  • Strong Product Protection – Ensures a constant flow of particle-free air from back to front, keeping samples contamination-free.

  • Ease of Operation – Simple design, easy to clean and maintain.

  • Cost-Effective – Generally less expensive compared to vertical flow cabinets.

  • Low Turbulence on Work Surface – Air moves in a straight path, minimizing cross-contamination inside the cabinet.

Reverse Laminar Air Flow (RLAF) / Sampling & Dispensing Booth

The RLAF booth is designed to provide a safe working environment for product, operator, and surroundings by combining HEPA-filtered airflow with negative pressure containment.

Air flows vertically downward through HEPA filters, while negative pressure ensures that fine powders or contaminants do not escape into the surrounding area, preventing cross-contamination. This makes RLAF ideal for handling powders and potent substances under aseptic conditions.

Compact in design and compliant with GMP standards, RLAF booths are widely used for sampling, weighing, and dispensing operations in pharmaceutical and chemical industries.

Optional Accessories

  • Front anti-static PVC curtains

  • Audio-visual alarm for HEPA filter condition

  • Clean-down timer with operation hold indicator

  • VFD-based control system

  • Sodium vapor lamps

  • Flame-proof fittings

  • Safe-change bag-in / bag-out filter arrangement

  • Double-skin side panels with view windows

  • Service access from front / back / side

  • Horizontal internal coving at base

Specifications

  • Air Cleanliness: ISO Class 5

  • Velocity at Grill: 90 FPM ± 20%

  • Motor & Blower: Statically & dynamically balanced

  • Main Filter: Miniplate HEPA, Class H14 (Optional ULPA)

  • Pre-Filter: Class 7, 90% at 5 μm

  • Flame-proof fittings

  • Filter Efficiency:

    • HEPA: 99.997% at 0.3 μm
    • ULPA: 99.999% at 0.12 μm
    • Pre-filter: 90% at 5 μm

  • Noise Level: 67 ± 2 dB

  • Power Supply: 220–230 V AC / Single Phase / 50 Hz

  • Lighting Intensity: > 500 Lux