Mobile Horizontal Laminar Flow Cabinet

What is the Mobile Horizontal Laminar Flow Cabinet?

A mobile horizontal laminar flow cabinet is mounted on castors for use at different locations within a facility. It brings ISO 5 protection to fixed equipment, temporary work stations or metrology positions.

Overview

The cabinet is built on a wheeled frame at working height, with lockable castors to hold position during use. Supply air is HEPA H14 filtered and flows horizontally at 0.3–0.5 m/s, and the unit may recirculate or connect to a flexible duct. Because it can be positioned over fixed equipment, it is useful for filling machines, balances or inspection positions that cannot be moved into a clean room. Power is a standard single-phase supply, and a pressure gauge and airflow alarm are fitted. When moving between rooms with different cleanliness classes, clean the unit before transfer, and requalify if airflow or filter performance may have been disturbed. The mobile design suits batch work, temporary installations and metrology positions.

How does it work?

In a horizontal laminar flow cabinet, room air is drawn through a prefilter and a HEPA filter and then pushed through a rear plenum and diffuser. It leaves the back grille as a unidirectional stream at 0.3–0.5 m/s and crosses the entire work surface before reaching the operator, carrying particles and microbes away from the work. Because the stream comes from behind the work, the operator has clear access to the whole bench with no barrier or downward draught. Air may then exhaust to the room or be ducted or recirculated depending on the model. The filter removes at least 99.97 % of 0.3 µm particles for HEPA and 99.999 % for ULPA. Face velocity, filter integrity and particle counts are the performance measures, and the laminar stream is easily disturbed by draughts, so the cabinet must be sited away from doors and air supply diffusers.

What are the key features?

• Wheeled frame with lockable castors
• HEPA H14 supply at 0.3–0.5 m/s
• Recirculating or flexible duct connection
• Positions over fixed equipment
• Pressure gauge and airflow alarm
• Single-phase standard power

What are the technical specifications?

A typical mobile horizontal laminar flow cabinet configuration offers flow direction of Horizontal, rear to front, filter class of HEPA H14, ≥ 99.97 % at 0.3 µm, face velocity of 0.3–0.5 m/s, mobility of Lockable castors, 4 positions, width of 900–1500 mm and exhaust of Recirculating or flexible duct. 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 Mobile Horizontal Laminar Flow Cabinet is used in filling and packaging positions, balance and metrology stations, temporary or batch work and equipment that cannot be relocated. Across the wider Horizontal Laminar Flow class, laboratories also deploy it for electronics and optics assembly, media preparation and plating and inspection and packaging.

Which standards and certifications apply?

Relevant standards and methods include ISO 14644-1 (cleanroom classification), ISO 14644-3 (test methods), IEST-RP-CC002 (unidirectional flow clean-air devices), EN 1822 (HEPA and ULPA filters), EU GMP Annex 1 (sterile manufacturing) and GB 50073 (cleanroom design code). Certification candidates for this model are CE and ISO 9001 manufacturing; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Site the cabinet away from doors, windows, air diffusers and walkways, since draughts above 0.2 m/s disturb the horizontal stream. Verify filter integrity and face velocity at installation and at least annually, changing prefilters every 3–6 months. Keep the work area clear of large objects that block the stream, and place items at the sides rather than directly in front of the filter face. Clean the work surface and interior with compatible agents and avoid aerosols that could contaminate the filter. Do not use the cabinet for hazardous aerosols or chemical vapour, since it protects only the work. Record requalification results to support audits.

How do I select the right Mobile Horizontal Laminar Flow Cabinet?

Choose a mobile cabinet when protection is needed at a fixed machine or temporary position that cannot be moved. Confirm castor stability, exhaust option and requalification after moving. RFQ: equipment to cover, width, working height, exhaust and movement frequency.

How does it compare with other Horizontal Laminar Flow variants?

Choose a horizontal laminar flow cabinet when the task needs clear, unobstructed access to the work surface and the operator does not need protection from aerosols. Decide whether the cabinet recirculates, exhausts to the room or is ducted, based on room conditions and the process. Select filter class by the required cleanliness, commonly HEPA H14 for ISO 5 and ULPA for ISO 4 or better, and match width and working height to the equipment. For GMP or aseptic use, choose stainless steel construction with cleanable surfaces. Confirm face velocity, filter integrity and particle counts at commissioning, and check that the site has no strong draughts. Horizontal flow is less suitable for tall work or when the operator must lean over the work, since the air then travels towards the operator's breathing zone.