BENEFITS OF USING DYNAMIC BALANCING VALVES Dynamic Balancing system makes easy of starting up the system and also give many advantages for installation and operation A good system that is controlled according to inner conditions needs a balanced HVAC system. According to this, every heating and cooling device should take the needed water flow for realizing the right heat transfer. The preferable system balancing method in England is putting twice regulation valves to pump return pipe, riser connections, branch points and terminal devices. And also this system needs a supervisor for balancing as proportional. Proportional balancing is a demanding work that needs many settings and supervisor services for the right water flow rates as every valve. Also this work needs much times. But dynamic balancing simplifies starting up the system and provides many advantages. Dynamic balancing valves work automatically and set its flow coefficient (variable Kv values) automatically, too. Flow limiters are well-known of dynamic balancing valves. They are used with cartridges that are set before now or external adjustable scale. All flow limiters have constant Kv values until the beginning flow value reaches the stated value. At the same time, the flow rate at the valve installation circuit, are set to the maximum value. If pump head at the valve are located in the valve’s working areas and the flow limiter works normally, the design flows are saved. Easy Start-up There are so many advantages of using Dynamic Balancing Valves at HVAC systems. The most important one is removing the proportional balancing necessity. If variable speed pumps are used in the system, pump period is decreased while starting up and also differential pressure value at the beginning valve has been bigger than the starting up value. All other valves are sit down under the bigger pump pressure and all has worked as limiting the flow rate at the certain maximum value. After this time, system is totally balanced and there is no need for having a proportional balancing. Also it doesn’t need more flow limiter valve. All flow limiter valves are removed from the branches, risers and pumps. Verifying the flow as being the part of starting up, digital manometer can be used as reading. STATIC AND DYNAMIC TYPE BALANCING VALVES USAGE Static balancing valves that are used at certain points are set according to the Project values and also provide the right distribution of the required flow. According to the valve size, the measuring precision of variable orifice static type balancing valves as the setting position is ± %10. Also dynamic balancing valves should be used as setting the certain and required flow values before now. The measuring precision is approx. ± %5. As it can be seen clearly from the below diagram, the flow rate will change during the red curve because of the difference of pressure as increasing and decreasing. While the setting, it will be a constant orifice area because of being a globe valve and then the flow rate will change. But at the dynamic balancing valves, there is a moving orifice area and it prevents to change the flow during the blue curve till the above one. APPLICATION FOR SHOPPING MALLS At the shopping mall projects, it is certainly advised that dynamic type balancing valves are more beneficial than static type balancing valves. Especially shell and core type projects if static type balancing valves are used, it needs to have many supervisor services for the starting up. Because all shops are not opened at the same time and at every shop opening, the system needs to have balanced not only the opening area. It means also many supervisor services. Also the service personnel set the project values at the entrance of the shop, but some times later there will be flow changes at the shop because of its inner devices. However, if dynamic balancing valves are used at these kinds of projects, valves are set to the project values and there is no need to start up for every time. It means that there hasn’t got supervisor cost for every time.