Keeping a cleanroom in classification

What needs routine attention

• Terminal filters, replaced on differential pressure rather than on the calendar alone
• Pressure cascade, checked against the scheme the room was actually designed to
• Door seals, interlocks and panel joints
• Air handling unit coils, drains and humidity control
• Gowning discipline, which degrades faster than any component in the room

Requalification

Classified rooms are retested at intervals set by their classification and by your regulatory route. Plan the interval at design stage, because the test needs the room in a defined state and that has to fit around your production calendar rather than fight it. Validation support.

Access decides whether any of this happens

A filter that cannot be changed without a shutdown becomes a filter that does not get changed. This is a design decision, made years before it turns into a maintenance problem, and it is one of the few things worth arguing about during layout.

What the climate does

Sustained humidity loads coils and drains harder than temperate reference schedules assume, and condensation shows up at panel joints and around doors before it shows up anywhere you are looking. Inspect those before the wet season, not after.

What we supply

• Replacement HEPA and ULPA filters
• Fan filter unit spares
• Door, seal and panel repair parts. Upgrade and retrofit.
• Requalification test planning and documentation