Pressure Independent Balancing Control Valves (PIBCV) AB-QM DANFOSS

Description

Control performance the AB-QM has a linear control characteristic. The AB-QM is pressure independent which means that the control characteristic is independent of the available pressure and is not influenced by a low authority. The flow limitation on the AB-QM is achieved by limiting the stroke and the Danfoss actuators calibrate to the stroke of the valves. This means that the AB-QM keeps its linear characteristic regardless of the setting or differential pressure. Because of the predictable characteristic, the actuators on the AB-QM can be used to change the response from linear to logarithmic (equal percentage). That makes the AB-QM suitable for all applications, including AHUs, where the equal percentage characteristic is needed to get a stable control loop. The actuators can be switched from linear to logarithmic by changing a dipswitch setting on the actuator.

The AB-QM valve with actuator is a pressure independent control valve or a PICV valve with an automatic balancing function and flow limiting. The Pressure Reducing valves become flow-limited control valves when an actuator is added, automatically balancing the system and delivering the highest possible indoor comfort and energy efficiency.

Sometimes differential pressure can cause harm to the heating or cooling systems. Such situations can lead to inconsistent heat distribution and poor energy efficiency. The best and easiest option is to use RZBM’s pressure-independent balancing control valves(PICVs) to stay away from such problems. These valves help to maintain a stable and dependable control, manage the volume of liquid flowing through a PPR Pipe and automatically adapt and compensate for pressure changes in the system.

Typical Application:

Temperature control with permanent automatic balancing on terminal units such as:

• Chillers
• Air-handling units
• Fan coils
• Induction units
• Radiant panels
• Heat exchangers

Description and Functionality:

The AB-flow QM’s limitation is achieved by limiting the stroke, and the actuators are calibrated to the valves’ stroke. This means that regardless of the setting or differential pressure, the AB-QM maintains its linear characteristic. The actuators on the AB-QM can be utilized to shift the response from linear to logarithmic because of the predictable feature (equal percentage).

Benefits

With a dynamic balancing solution, the AB-QM PICV valve provides the best control functionality.

1.Improved Comfort: The indoor comfort improves with a consistent room temperature. Temperatures are maintained precisely, increasing business productivity and improving hotel visitors’ experiences.

2.Energy Savings: Under all circumstances, a well-balanced system boosts energy efficiency and lowers energy expenses.

3.Reduced maintenance: The actuators mounted on the pressure-independent valves require fewer movements to maintain the temperature steady because the pressure-independent valves ensure optimum working conditions. This extends the actuators’ lifetime value and lowers maintenance expenses.

4.Accurate control: Due to continuous volumetric flow ranges and large differential pressure ranges, flexible planning is possible. Dimensioning, presetting, hydronic balance, and commissioning are all made easier. Extension of the system is made easier with independent pressure control.

All of these aspects work together to ensure that our solution will assist you in designing, delivering, and maintaining a system that closes the performance gap and reduces energy and costs over time.