Stainless Steel Horizontal Laminar Flow Cabinet

What is the Stainless Steel Horizontal Laminar Flow Cabinet?

A stainless steel horizontal laminar flow cabinet uses 304 or 316L construction for aseptic and GMP environments. Its smooth, cleanable surfaces suit pharmaceutical and medical-device work and can be disinfected and documented.

Overview

This cabinet is fabricated in 304 or 316L stainless steel with welded or crevice-free joints and a coved work surface, so it can be cleaned and, where required, disinfected to GMP expectations. Supply air is HEPA H14 filtered and flows horizontally at 0.3–0.5 m/s, giving ISO 5 at the work surface. A prefilter protects the HEPA stage, and a pressure gauge shows loading. The design is often ducted or recirculating according to the room, and electro-polished or brushed finishes are available for different cleaning regimes. Documentation such as material certificates and filter test reports is usually provided. The cabinet suits aseptic assembly, device packaging, injection preparation areas and other regulated work where a particle-free, cleanable surface and audit-ready records are required.

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?

• 304 or 316L stainless steel construction
• Welded, crevice-free, coved work surface
• HEPA H14 supply at 0.3–0.5 m/s
• ISO 5 cleanliness at the work surface
• Optional ducted or recirculating exhaust
• Material certificates and filter test reports

What are the technical specifications?

A typical stainless steel horizontal laminar flow cabinet configuration offers flow direction of Horizontal, rear to front, body material of 304 or 316L stainless steel, filter class of HEPA H14, ≥ 99.97 % at 0.3 µm, face velocity of 0.3–0.5 m/s, cleanliness of ISO 5 at work surface and finish of Brushed or electro-polished. 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 Stainless Steel Horizontal Laminar Flow Cabinet is used in aseptic assembly, medical-device packaging, injection preparation areas and regulated pharmaceutical inspection. 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 Stainless Steel Horizontal Laminar Flow Cabinet?

Choose stainless steel for aseptic or GMP work requiring cleanable surfaces and documented materials. Confirm finish, exhaust arrangement and requalification records. Ask for material certificates with the quotation. RFQ: grade, finish, width, exhaust, cleanliness target and documentation needs.

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.