Labconco Type C1 Biosafety Cabinet Models 30468 - Manual (Page 49)

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Optional Exhaust Connection Requirements
Certain applications such as working with odorous products or volatile toxic materials
will require the connection of the biosafety cabinet to an exhaust system.
Note: The Type C1 exhaust connection includes an integral inlet relief valve, which
functions as a one-way, or check valve. During operation, the exhaust system draws all
of the cabinet’s exhaust air, plus a volume of room air through the relief valve into the
exhaust duct. The inlet relief valve functions as a “shock absorber” allowing the cabinet
to maintain optimal inflow during changes in room air pressure.
Note: Because the Type C1 cabinet has an integral exhaust fan, the vacuum
requirements of the exhaust system will be much lower than existing Type B units.
Please see the volume and vacuum requirements in Table 2-1, in If you intend to
connect the biosafety cabinet to an exhaust system: in Chapter 2: Prerequisites
Note: If the research involves the use of toxic compounds or volatile materials, contact
the facility’s safety officer or Labconco to ensure that the biosafety cabinet and its
exhaust system are compatible with the materials you will be working with.