Exhaust washdown requirements – Labconco Protecto Stainless Steel Perchloric Acid Laboratory Fume Hoods 9682100 User Manual
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Chapter 2: Prerequisites
Full Open 28" Sash Opening
Hood
Size
Standard Model Description
Face
Velocity
Exhaust
Volume
Static
Pressure
Loss
4'
48" Protector Perchloric Acid Hood
100 fpm
730 CFM
0.20" H
2
O
5'
60" Protector Perchloric Acid Hood
100 fpm
960 CFM
0.30" H
2
O
6'
72" Protector Perchloric Acid Hood
100 fpm
1180 CFM
0.50" H
2
O
8'
96" Protector Perchloric Acid Hood
100 fpm
1660 CFM
0.26" H
2
O
Proper blower selection can be determined from these
exhaust requirements and the total system static
pressure loss. Contact Labconco Customer Service for
assistance in sizing a remote blower system.
Exhaust Washdown
Requirements
The entire exhaust duct system must feature an
adequate washdown system. This includes the exhaust
ductwork, blower, hood structure itself, and any
ductwork located outside the blower. Wash rings are
required to be placed in the exhaust duct system every 8
to 10 feet and after any change in direction to provide
adequate washdown. Contact Labconco for washdown
ring ordering information. Order part number 4746000
for a 10" wash ring and 4746100 for a 12" wash ring.
A washdown and drain should be provided in your
exhaust blower. This washdown water and effluent
material can be drained from the exhaust blower back
directly into the exhaust duct for disposal. Contact
Labconco for blowers. The Protector Perchloric Acid
Hood washdown drain outlet is sized for 2" nominal
(2.375" OD) Type 316 pipe.