ISO 14644-7 Transfer Devices - Foster Wheeler Italiana
ISO 14644-7 Transfer Devices - Foster Wheeler Italiana
ISO 14644-7 Transfer Devices - Foster Wheeler Italiana
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<strong>ISO</strong> <strong>14644</strong>-7 Annex DD.8 D1 transfer device• The D1 transfer device (see Figure D.7) has doors and HEPA filters which, when operated inthe correct sequence or interlocked transfer procedure, do not permit unfiltered air from thebackground environment to reach the separative-device environment or unfiltered air from theseparative-device environment to reach the background environment.• EXAMPLES Double-filter transfer chambers, or separative devices used as atransfer device.• 1 separative device environment• 2 valve• 3 background environment• 4 HEPA filter• 5 ingress• 6 egress• 7 sealed door• 8 work surface of controlled workspace• Figure D.7 — D1 transfer device34
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