Equipment Description; Principal Of Operation - Parker DUSTHOG PNP Owner's Manual

DUSTHOG PNP Series

2.2 Equipment Description

This section will briefly describe each component in the PNP and its role in the system's operation.
Dust Drawer
Most units will include a dust drawer where all collected fume or dust will fall into during filter cleaning.
Angled flanges will direct dust that is blown off of the primary filters into a dust bin. Behind the lowest
door on each cabinet, one 20 gallon bin will be housed behind each door of the cabinet (drawer quantity
dependent on unit size). They can be accessed and maneuvered to a disposal site where an easy-empty
design allows for disposal or recycling of collected material.
Filter Cabinet
The filter cabinet consists of the primary cartridge filters which are accessed through a hinged door on
the front of the module. The filters are moved in and out of the cabinet and sealed to the tubesheet with
a cambar mechanism.
The PNP comes standard with ProTura DH nanofiber technology cartridge filters. Additional media options
and filter configurations are available and may have been specified for your application.
Pulse Cleaning System/Blower Cabinet
The compressed air pulse cleaning system is used to dislodge collected contaminates from the filters
with bursts of air directed through cleaning nozzles. One filter is cleaned at a given time by controlling
the solenoids on the manifold with the cleaning system programmed into the touch screen display.
The controls for the cleaning system and all other electronics are housed in this cabinet.
The compressed air supply connection is located on the rear of the cabinet.
The system control panel is located at the front of the module on a tool operated, hinged access panel.
The supply power for the system is located at the rear of the cabinet.
The blower(s) is also located within this module immediately above the pulse cleaning system. The blower
is an Electronically Commutated (EC) motorized impeller assembly. Depending on airflow requirements,
there may be several blowers in this compartment installed in parallel.

2.3 Principal of Operation

The purpose of the PNP is to collect fugitive dust generated by various industrial processes during operation.
The collected fume or dust is pulsed off of the primary filters directly back into the unit dust drawer. The dust
bin can be emptied directly into a drum or container of the customers choice for recycling or disposal.
Differential Pressure
Differential pressure, also referred to as pressure drop (ΔP), is an indication of the resistance to airflow
across the filter elements. Differential pressure is commonly measured in inches of water column (W.C.).
It is normal for the differential pressure to increase as the collector operates. Any sudden increase or
decrease in differential pressure may indicate a problem in the collector (blinded filters, leaks or other
cause) that requires immediate attention. See troubleshooting guide in section 6 for assistance.
The operating differential pressure displayed on the unit will typically run between 0.5 to 3.0 in. W.C.
(124.4 to 746.5 Pa) for a primary cartridge. The expected pressure range for the after-filters is
0.5 to 3.0 in. W.C. (124.4 to 746.5 Pa).
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