ISO 14644-7 Transfer Devices - Foster Wheeler Italiana

ISO 14644-7 Annex DD.4 B1 transfer device• The B1 transfer device (see Figure D.3), when operated in accordance with a correct sequence orinterlocked transfer procedure, does not permit the direct passage of air between the backgroundenvironment and separative-device environment. However, air from the background environmentcan be trapped and then released into the separative-device environment, and air from theseparative-device environment can be trapped and released into the background environment.• EXAMPLES Double-door sealed transfer chambers, bagging ports, telescopic wasteports and simple docking devices.1 separative-device environment2 background environment3 ingress4 egress5 sealed door6 work surface of controlled workspaceFigure D.3 — B1 transfer device30