TM 5-3895-374-24-2
FEBRUARY 1993
TABLE TWO (CONT)
BAGHOUSE TROUBLE SHOOTING
SYMPTOM
CAUSE
REMEDY
4.
Dust escaping at
Low air volume.
See above
source.
Ducts leaking
Patch leaks so air does
not bypass source.
Improper hood design
Close open areas around
dust source. Check for
cross drafts that overcome
suction. Check for dust being
thrown away from hood grinding
wheel.
5.
Dirty discharge at
Bags leaking
Replace bags. Tie off bags and
stack
replace at later date(or block
off) Isolate leaking compartment
if allowable without upsetting
system.
Bag not sealing
Check for proper bag
installation
Failure of seals in
Caulk or weld seams
joints at clean/dirty
air connection.
Insufficient filter cake
Allow more dust to build
up on bags by cleaning
less frequently . Use a
precoating of dust on bags.
GENERAL. DISCUSSION - Static pressure interpretation.
The velocity pressure at any point of measurement is a function of the velocity of the air or gas and its density.
The static pressure at a point of measurement in the system is a function of system design (resistance to flow) air density
and the amount of air flowing through the system.
The static pressure measured in a "loose" or oversized system will be less than the static pressure in a "tight" or
undersized system for the same airflow rate.
In most systems, pressure measurements are indicators of how the installation is operating These measurements are the
result of air flow and, as such, are useful indicators in defining system characteristics.
Field static pressure measurements rarely correspond with laboratory static pressure measurements unless the fan inlet
and fan outlet conditions of the installation are exactly the same as the inlet and outlet conditions in the laboratory.
page 3-700
