Pressure Drop
A measure of the resistance the gas stream encounters as it flows through the system. It may be referred
to as pressure differential across the media, across the dust collector, or the pressure drop across the
entire system, depending upon the points of measurement.
Pulse Cycle
The interval of time between pulsing one row of filters and pulsing that row again.
Pulse Duration (On-Time)
The length of time a pulse lasts, generally described as the length of time the electrical signal holds the
solenoid pilot valve open.
Pulse Delay (Off-Time)
Elapsed time between pulses in a dust collector cleaning system.
Pulse Clean Dust Collector
A dust collector using short intermittent pulses of compressed dry air to clean dust from the filter media.
Re-entrainment
The phenomenon where dust is collected from an air stream and is then returned to the air stream. This
occurs when dust is dislodged from a filter media during cleaning and is again captured by the same or
an adjacent filter media.
Rotary Airlock Valve
Device having a star wheel (rotor) designed to provide an air tight seal between the negative or positive
pressures of the collector and the outside atmosphere.
Screw Conveyor
A revolving screw operating in a fixed trough for conveying material from one point to another. Note:
Should a screw conveyor be used in a dust collector system, an airlock is still required to ensure
ventilation air does not pass through the conveyor.
SCFM
Standard cubic feet per minute. The volume of gas flow per minute at standard temperature and
pressure conditions (70
O
F @ sea level).
Solenoid Valve
An electromechanical plunger device that is either "normally open" or "normally closed". In use with a
dust collector, it is for the relief of air pressure to activate a compressed air device such as a diaphragm
valve.
Timer, Sequential
An electrical mechanism that activates a dust collector's cleaning system.
Tubesheet
A steel plate on which the open end of the filter elements are connected. This wall separates the clean
air and dirty air plenums of the dust collector.
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Summary of Contents for Gold GS10
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