By Neil Thomas Beng, CTCB D & B Cleanrooms, Design & Manufacture of Clean Air products Validation & Service Longest Established UK Company In 50 years years we have witnessed, made or rectified most of the common mistakes.
Selecting your Cleanroom Company • Be early • Do not waste your expense with more than 4 tenders • With many tenders some prices will be flyers • Experience, knowlegde & inovation • References for last 3 projects within 18 months • Beware of the yes men • Multi product company will tend to give an unbiased view • In house capability
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And Health & Safety
With Adequate Supervision
Seriously Obtain Record Data From The H&S Executive
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Clean Room Types CLASS 'D' OR 'E' / ISO 14464/1 CLASS 4 & CLASS 5 Vertical unidirectional laminar flow with raised floor.
CLASS 'F' VERTICAL / ISO 14464/1 CLASS 5 Unidirectional laminar flow wide side exit.
CLASS 'F' HORIZONTAL / ISO 14464/1 CLASS 5 Conventional flow.
CLASS 'H' OR 'J' OR 'K' / ISO 14464/1 CLASS 6, CLASS 7 or CLASS 8 Laminar flow side exit.
ISO Class 3 Unidirectional
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Clean Air Rigs
The range of clean air rigs can be mobile as shown or fixed, either from the ceiling or floor
ISO Class 3-7
Laminar Flow Cabinets
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ISO Class 7 In Unclassified Area Temp o 21 C +/- 0.21 oC RH 35% +/- 3%
Grade C In Grade D Area
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Grade C In Grade D Area
Grade A, B &C Areas In The Carpark
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Grade A-B
Ability to Reduce Cost • • • • • •
Longer tender periods Concise Brief Accurate Room Loading Environmental Control Parameters Ambient Conditions Beware of the yes men
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COST
Ability To Reduce Project Cost.
Concept
Design
Build
Handover
TIME
Cost / Benefits Relationship.
Year 1
Year 2
Year 3 Costs
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Year 4
Year 5
Benefits
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Apples for Apples
Apples for Apples
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Consider • • • • •
Lights Doors Partitions Ceiling Vinyl Installer
Design Brief Table 1 - Selected airborne particulate cleanliness classes for cleanrooms and clean zones ISO
Maximum concentration limits (particles/m³ of air) for particles equal to and larger than the considered sizes
Classification shown below (concentration limits are calculated in accordance with equation (1) in 3.2) number (N)
BS5295
209 E
Note Blue figures relate to particles (ft³) and superseeded (or existing) Standards/Guides
0.1 µm ISO Class 1
0.2µm
10
0.3
ISO Class 2
100
ISO Class 3
1 000
0.3µm
0.5µm
1µm
2
0.06
2.8
24
0.07
10
0.3
4
0.1
28
237
6.7
102
2.9
35
1
8
5µm
0.22
0
M1.5 1
ISO Class 4
10 000
284
2 370
67.3
1 020
28.9
352
10
83
2.3
0
ISO Class 5
100 000
2841
23 700
673
10 200
289
3 520
100
832
23.6
29
0.8
1 000 000 28409 237 000
6732
102 000
2897
ISO Class 6
US FED
C
M2.5 10
D
M3.5 100
E/F
35 200
1000
8 320
236
293
8.3
M4.5 1 000
G/H
352 000
10000
83 200
2363
2 930
83
M5.5 10 000
J
ISO Class 8
3 520 000 100000
832 000
23636
29 300
832
M6.5 100 000
K
ISO Class 9
35 200 000 1000000 8 320 000 236363 293 000
8323
ISO Class 7
NOTE: Uncertainties related to the measurement process require that concentration data with no more than three significant figures be used in determining the classification level. * at rest conditions
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Design brief • • • • • •
Air Change Rate 20 min Recovery Cleaning Processes & Suitability Servicing & Maintenance Operational Costs Doms Lecture
People Generated Matter • 250,000 particles of 0.5µØ /min @ rest • 750,000 – 1,000,000 of 0.5µØ/min motion • Particles can carry bacteria • Material In • Dirty Process
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Layout considerations
Max velocity 0.3m/s
MSC HLF
MSC
Site positioning • • • • • •
Drainage Electrical Supply Heating Fresh Air Inlet Process Services Deliveries & Despatch