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Dortek - Market Leader in GRP Doors

Cleanroom Doors

Cleanroom doors, cleanroom fire doors, contamination control door, containment cleanroom door, hinged or sliding and installed in cleanroom facilities all over the world.

Class 4 Cleanroom door Class 3 Cleanroom doors Alcon Cleanrrom doors

A Cleanroom is a controlled environment but is defined by ISO standards as ‘a room in which the concentration of airborne particles is controlled, and which is constructed and used in a manner to minimise the introduction, generation and retention of particles inside the room’. The classification of a cleanroom is dependant too the particle concentrate of air, otherwise known as microbes and contamination. These are controlled by the number of particles permitted per cubic metre at a specified particle size. Some typical environments are:

Pharmaceutical – Biopharmaceutical – Life Sciences – Healthcare – Manufacturing – Electronic Technologies

There are three standards that measure the classification of a cleanroom:

ISO 14644-1 Cleanroom Standards
BS 5295 Cleanroom Standards

US FED STD 209E Cleanroom Standards

Cleanroom Doors Classification Table

Whether a cleanroom is an ISO class 100 or class 1000, Dortek Cleanroom Door Systems play an essential role in preventing cross-contamination as well as maintaining correct room pressures, air circulation rates and ensuring optimum operating efficiency.

Many cleanroom facilities have been built using traditional construction methods, concrete block or stud wall with on-site surface applied finishes, on more recently constructed cleanrooms they have been built to modular specifications with cleanroom wall panel systems. Modular build offers faster site build and faster sealing of the cleanroom envelope. It is also relatively easy to replace damaged areas either during or after construction and you are guaranteed a uniform finish across the whole cleanroom facility. In either construction Dortek’s installation of cleanroom doors is equally suitable for various dimensional openings and panel/wall thicknesses.

Our cleanroom door product range has seen continuous investment in design, development and manufacturing techniques that ensure they meet cGMP standards. One of the world’s top 10 pharmaceutical companies defined its own cGMP requirement for a cleanroom door:

The cleanroom door shall have a smooth, non absorbent surface and, where appropriate, be self closing and close fitting. The materials for construction should be:

Easy to clean
Non-fibrous and non-shedding
Resistant to the accumulation of dirt and debris
A barrier against the harbourage of dirt and debris

Inert and not normally reactive to chemical or other agents used in the environment

Why GRP for cleanroom doors?

Great emphasis is placed on materials used for cleanroom construction. The following table highlights the mechanical properties of GRP compared to other structural materials.

GRP is the material of choice for modern cleanroom designers due to its non-porous and inorganic construction. A Dortek cleanroom door is manufactured from millions of strands of glass fibre and polyester resin. Cleanroom doors are produced with the following characteristics:

Closed moulded process, seamless finish
A product that has no seams or joins on the door or surfaces and no holes or crevices within
Built in colour

Non-shed material, compliant with BS 5295 part 0 1989. Approved for use in class 100, 1000, 10,000 and 100,000 cleanrooms

Door automations are supplied to suit the room design and requirements of the facility and this flexibility enables specifiers to concentrate on practical cleanroom solutions. Dortek automations, hinged or sliding facilitate efficient access to and from a controlled environment and prevent an increased loss of expensive clean air. In general, there are three airlock designs:

Cascading pressure airlock
Pressure bubble

Pressure sink

These designs, combined or used individually, protect the controlled environment or prevent cross contamination between two process areas. When designing a cleanroom along with air locks, the process must be supported by the infrastructure, but these designs can be compromised if incorrect doors are specified. A Dortek cleanroom door can be interlocked or have air seals incorporated where required to control pre-determined air circulation and reduce airborne contamination within the facility; this can be a very effective way of reducing HVAC running costs, ensuring efficiency.

Dortek’s cleanroom doors do withstand/tolerate regular chemical cleaning, and due to the smooth surface, no joints or ledges of the door harbour bacteria, unlike steel, aluminium and laminated timber doors. Traditional painted steel or aluminium constructions deteriorate, flake and shed when exposed to common cleaning regimes; specifying GRP prevents future downtime due to contamination.

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