The BPS 402 is a complete system for filter monitoring and cleaning. The NEMA 4 control panel provides the excitation voltage the the BPS 400 differential pressure sensor. The control panel also displays the differential pressure in inches of water, transmits a 4-20mA signal proportional to the pressure, and provides relay outputs to initiate bag cleaning and high pressure alarms. The filter cleaning relay output interfaces directly with the existing bag pulse sequencing system. The BPS 400 sensor is connected to the control panel through intrinsically-safe barriers that are mounted in the control cabinet.
Most dust collectors clean or backwash the filters at regular intervals controlled by a cycle timer.
As the filter bags or filter cartridges become dirty, the differential pressure across the tube sheet increases. If the filters are cleaned based on differential pressure, rather than a cycle timer, they will be cleaned only when necessary. The BPS 400 provides the reliable differential pressure measurement to make on-demand cleaning a reality. The BPS 402 Control Panel gives the user the ability to monitor the process for upset conditions. The On-Demand filter cleaning control of the BPS 402 provides longer filter life and optimum system performance.