Table of Contents
When would you use a balancing valve?
Automatic balancing valves are utilised in central heating and cooling systems that rely on flow of water through the system. They use the latest flow technology to ensure that the design flow rate is achieved at all times irrespective of any pressure changes within the system.
What is a balanced control valve?
To balance a single-seated valve, balancing holes are added to equalise the pressure. on both sides of the plug. This eliminates any unbalanced force on the plug, however further seals are required for the extra leakage path between the plug and the cage.
What is a circuit balancing valve?
Circuit balancing valves (CBVs) combine a double regulating valve with a primary measuring element for determining and adjusting hydronic fluid flow in an HVAC system. CBVs are an effective means of ensuring occupant comfort in buildings incorporating hydronic heating or cooling systems.
What does a balancing valve do?
Balancing valves are throttling devices designed to regulate the fluid flow through hydronic components. In hydronic systems (HVAC systems that use water as a medium to heat and cool areas of the facility), they facilitate the distribution of heated or chilled water to all terminals.
How does a balance valve work?
Dynamic balancing valves work as flow limiters. They are set to a desired flow rate and ensure that a larger flow rate does not take place. If the pressure in front of the valve increases, it will close some more, so the pressure loss across the valve becomes correspondingly higher.
Does a balancing valve go on the supply or return?
Most agree (including those of us at JMP) that flow balancing valves should be placed on the return side of coils whenever possible. Compared with placement on the supply side, flow balance valves on the return side will reduce the amount of free air in the coil and thus the potential for noise.
Where do you put a balancing valve?
Shifting viewpoints on flow controls can cause disagreements where balancing valves should be located in closed loop systems. Many (including us at Hays Fluid Controls) agree that the balancing valves should be placed on the return side, whereas other companies may choose the supply side.
What is the difference between a circuit setter and a balancing valve?
Circuit setters feature a built-in balancing valve system and monitoring and measuring points allowing for automatic calibration of the water system. Manual balancing valves come with a wide range of benefits, including the capability to read low rates of flow very accurately while saving energy.
Where should balancing valves be placed?
Where do balancing valves go?
How does a manual balancing valve work?
The manual balancing valve (MBV) must provide a unique combination of two functions to the hydronic system: the ability to selectively throttle the flow to a terminal device or branch circuit (several terminal units or sub-branches), and the ability to measure the resulting flow.