400.3 Cleaning System Components
HEADER (COMPRESSED AIR PRESSURE RESERVOIR)
A header is provided with a 1 in. NPT coupling at each end. Supply the header with clean, dry
compressed air between 90 and 105 psi. The air supply line should be equipped with a manual shut-off
valve, a filter/separator, an air regulator and a pressure gauge, all located near the unit.
SOLENOID/DIAPHRAGM VALVES
Solenoid-operated valves on the collector operate one (1) diaphragm valve each. Diaphragm valves on
the collector operate one (1) pulsejet blowpipe each. The automatic timer control energizes the solenoid,
which causes the plunger in the solenoid to move. When the plunger moves, air in the upper chamber of
the solenoid is released to the atmosphere. The resulting difference in air pressure between the upper
chamber and the compressed air reservoir allows the diaphragm valve to open. This allows the air in the
header to be released into the pulsejet blowpipes. The size of the diaphragm valves is 1” or 1-1\2”,
depending on the size of the collector. See Section 700 - Replacement Parts Lists for the size of
diaphragm valves on your collector.
PULSEJET BLOW PIPE
Each pulsejet blowpipe contains one (1) nozzle for each cartridge. These nozzles are positioned above,
and directed into, the opening of the filter cartridge. As
the pulse of air reaches the nozzle, it is
accelerated through the smaller diameter. The resulting shock wave travels down the length of the inside
of the filter cartridge, dislodging the dust from the filter cartridge.
Use caution when working near an operating collector. Wear appropriate ear and eye protection!
Hearing damage can result from high noise levels generated during filter cleaning or “pulsing”
and collected debris, near the diaphragm valve discharge, may become a projectile, creating the
potential for eye injury. Do not operate with access doors open! See Section 100.3.
33
Pulse-jet Blowpipe
Diaphragm Valve
Header (Compressed
Air Reservoir)
Figure 400.3.1 - Pulse Jet
Cleaning Components
Solenoid Valves
Automatic
Timer
Control
Nozzle
Filter
Cartridge
Pulsing Air
Dust
Dust
