• IN FIXED FLOW SYSTEMS, FLOW IS AUTOMATICALLY MAINTAINED AT A SPECIFIED FLOW RATE In constant flow systems, the FlowCon valve is selected to operate within the control range. That's one reason why FlowCon valves are offered in four pressure differential control ranges: to meet the diversity of conditions existing on high rise or remote buildings. From extreme low pressure at the top to excessive ones at the bottom. ELIMINATES MANUAL BALANCING REDUCES COST BY REQUIRING REVERSE RETURN PIPE ELIMINATE RE-BALANCING SHOULD CIRCUITS BE ADDED OR DELETED