Labconco Protecto Stainless Steel Perchloric Acid Laboratory Fume Hoods 9682100 - Manual (Page 24)

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Chapter 3: Getting Started
Connecting the Washdown
Control Fixture to the
Protector Perchloric Acid
Fume Hood
The control valve used for the washdown system is
located on the left hand side of the hood superstructure,
upper fixture position. The valve assembly has been
fully plumbed to the internal spray nozzles and a
connection point has been left for the addition of the
water line used on exterior mounted washrings. This
connection is located in the upper left hand portion of
the fume hood structure. The supply line for the
washdown control valve itself, features 3/8" diameter
copper tubing. The supply line tubing shall be provided
by the qualified installer.
Certifying the Protector
Perchloric Acid Fume Hood
The combination of your laboratory hood, exhaust
ductwork, and exhaust blower gives you the flexibility
to change the airflow at the sash opening of your hood.
To determine the actual face velocity at the sash
opening, airflow velocity readings will need to be
taken. This should be done across the sash opening of
the hood in accordance with the Industrial Ventilation
Manual section on laboratory hoods. (See Appendix D
– Reference) Labconco recommends an average face
velocity at the sash opening of 80 to 100 feet per
minute.