Filter Monitor (FM) vessels should be appropriately sized to match the flow rates required for their operation and shall not be operated at flow rates that exceed the rated flow of the vessel as configured (Element rated flow x Number of elements installed). Also, at low flow rates, water can be poorly distributed in FM vessels with the possibility of localised Super Absorbent Polymer (SAP) activation resulting in the threat of water transmission and SAP migration. Appropriate sizing is not always easy to achieve when the same vessels are required for different applications that demand different flow rates. There are several considerations to enable this flexibility without compromising the performance of the filter vessel.
JIG Bulletin No. 52 (Jun 2012) – Filter Monitor Vessels / Flow Rates and Differential Pressure Monitoring