SMART VALVES
techniques in order of increasing complexity and effectiveness :
1 . Fixed outlet pressure control This basic approach involves using a pressure reducing valve ( PRV ) to control the maximum pressure entering a zone .
Advantages :
• Simple installation requiring only a PRV
• Low cost with no electronic equipment needed
• Easy maintenance and operation
Disadvantage :
• Lack of flexibility to adjust pressures at different times of the day , limiting potential savings
2 . Time-modulated pressure control This method builds upon the fixed outlet system by adding a device to further reduce pressure during off-peak periods .
Advantages :
• Greater flexibility , allowing pressure reduction at specific times
• More cost-effective than flow-modulated options
• Relatively easy to set up and operate
Disadvantage :
• Does not react to real-time water demand , which can be problematic in emergencies like fires
3 . Flow-modulated pressure control This advanced technique provides greater control and flexibility than time-modulated systems .
Figure 2 : General test bench layout / functions
Advantages :
• Offers more significant savings potential
• Adapts to changing water demand , ensuring adequate pressure for emergencies
Disadvantages :
• Higher cost due to more expensive electronic controllers and the need for a properly sized meter
• Requires a higher level of expertise to operate and maintain
4 . Smart valve control with flow-modulated pressure management The most advanced and effective approach , smart valve control systems combine flowmodulated pressure management with real-time data from critical points in the network .
Advantages :
• Provides the ultimate level of control and maximum potential savings
• Self-adjusting system that adapts to demand fluctuations 24 / 7
• Can be integrated with existing SCADA or process control systems
Disadvantage :
• Most complex form of pressure control , requiring advanced technical capabilities
Smart valve control implementation
In collaboration with SAMSUN Makina Sanayi in Turkey , we conducted a simulation on test benches to demonstrate the benefits and functionality of a smart valve control system for leakage reduction . The
Figure 3 : General test bench layout / equipment
44 Valve World November 2024 www . valve-world . net