Static Balancing Valve
Features:
Size: DN50-500
Pressure rating: PN10/PN16
Working temperature: -10~120℃
Design standard: GB/T 28636-2012, BS7350
Structural length: GB/T12221 Series 1, EN558-1 Series 1
Connection flange: GB/T17241.6, ISO7005
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What is Static Balancing Valve？
The static flow balancing valve is designed for achieving hydraulic balance between different loops in a circulation system, allowing for precise flow regulation in each branch or at each terminal.
The CM system balancing valve also functions as an on/off valve and features a reliable opening degree locking memory device. This ensures that after maintenance, the system returns to its original set state, guaranteeing the proper operation of the circulation system according to the initial design conditions. It provides the most reasonable hot and cold values while minimizing energy consumption.
System Application of Static Balancing Valve:
CM series balancing valves can be widely used in heating and cooling systems, domestic water systems, cold tower circulation systems, dehumidification and other hydraulic circulation systems. It calculates the resistance of the primary main pipeline and each graded pipeline, and then uses a differential pressure gauge to measure and adjust the Kvs value to balance the resistance and distribute the flow.
It is used in conjunction with a differential pressure control valve to stabilize the pressure difference between the supply water and the return water, automatically eliminate the interference of system pressure changes, and keep the pressure difference between the static balancing valve and the differential pressure control valve within a stable value. This ensures that the valve downstream of the return water will not produce overflow or water shortage to achieve the best working state.
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The product side flanges comply with national, German, Russian, American, British and Japanese standards and other domestic and international standards for multiple pressures, easy connection and wide adaptability, which can reduce the type of purchase and stock.
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Quality Control Process
Standards&Features:
Installation Instructions and Precautions of Static Balancing Valve：
① The balancing valve should be installed in a location where manual adjustment, pressure difference/flow measurement, and draining are convenient. It can be installed either horizontally or vertically. To ensure more accurate balancing flow, a straight pipe section must be installed at both the upstream and downstream ends of the valve. The required length of the straight pipe is shown in the diagram. The valve must be installed following the flow direction indicated by the arrow on the valve body.
② Before installation, remove the flange sealing cover and ensure there are no debris in the system.
③ Ensure that the flow direction of the medium aligns with the direction marked on the valve body.
④ The valve body installation direction is flexible, and the balancing valve can be installed either on the supply or return pipeline. Only one valve needs to be installed per loop. It is recommended to install the balancing valve on the return pipeline with lower water temperature.
⑤ The balancing valve on the main pipeline should be installed in the direction of the pump outlet. The degree indicator on the handle should face the direction visible to the commissioning personnel for easier adjustment. Ensure that no obstacles are in front of the measurement port on the valve body to avoid obstructing the connection of testing instruments during commissioning.
⑥ Ensure sealing between flanges. The measuring port should be installed before the valve is filled with water.
⑦ Once the valve opening degree is set, do not alter it at will. The balancing valve has a shut-off function, eliminating the need for additional shut-off valves.
⑧ To prevent damage to the pressure test port, it should only be installed after the valve is fully mounted. During installation, follow the principle that the red end is for the supply side, and the blue end is for the return side.
⑨ To ensure proper operation, when CM0024/25/28 valves are connected to elbows or pumps, a certain length of straight pipe must be kept. When connected to an elbow, follow the 5D rule before the valve and 2D rule after the valve. When connected to a pump, follow the 10D rule. See Diagram 1.
When installing the valve, leave sufficient space for adjustments as shown in Diagram 2 and Diagram 3:
DN15-DN50: H1 > 200mm, H2 > 170mm
DN50-DN150: H1 > 200mm, H2 > 230mm
DN50-DN150: H1 > 200mm, H2 > 400mm
Case:
Application:
Product Applications of Static Balancing Valve:
Building HVAC or Heating Networks
In building HVAC and heating systems, in order to meet energy-saving requirements, it is necessary to ensure that all main and branch pipelines meet the designed flow rates. Therefore, balancing valves should be installed on the main, dry, vertical, and branch pipes.
District Heating Networks
District heating networks, typically from a boiler room or heat station supplying heat to multiple buildings, may face uneven flow distribution due to differing distances from the heat source. Without effective equipment to eliminate excess pressure in the shorter loops, the flow distribution will not meet design specifications, causing overheating at the near side and underheating at the far side. Balancing valves should be installed on each dry pipe and branch pipe to ensure balanced flow between each main pipe and building.
Heat Exchange Units or Chillers
When heat exchange units or chillers are installed in parallel, if the flow rates of the units do not match their rated flow, the units cannot operate efficiently. In such cases, balancing valves should be installed on each heat exchange or chiller unit to ensure that each unit operates at the designed flow rate, ensuring safe and normal operation.
Thermal Stations
In systems where thermal power stations or boiler rooms supply hot water or steam to multiple heating stations, balancing valves should be installed on the primary loop side of each heating station to ensure the required flow. Additionally, to guarantee the flow in each secondary loop is maintained at the designed value, balancing valves should also be installed on each secondary loop of the thermal station.
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