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Understanding Balancing Valves Types

Time: 3-January 2025 | Source: I-FLOW| Share

1. Manual Balancing Valves
What They Are:
Simple, hand-adjusted valves used to control flow by restricting the passage.
How They Work:
You manually turn the valve to set the desired flow during system commissioning.
Pros:
Budget-friendly and easy to install.
Reliable for steady, predictable systems.
Cons:
Requires hands-on adjustment.
Not great for systems with changing flow needs.
Best For:
Constant flow HVAC systems.
Straightforward heating/cooling loops.
2. Automatic Balancing Valves
What They Are:
Valves that self-regulate to maintain constant flow, even if pressure changes.
How They Work:
An internal mechanism adjusts the opening to keep the flow rate steady, no matter what’s happening elsewhere in the system.
Pros:
Set and forget – adjusts automatically.
Reduces the need for recalibration.
Cons:
Costs more upfront than manual valves.
Can be trickier to install.
Best For:
Systems with variable flow needs.
Dynamic heating and cooling setups.
3. Pressure Independent Control Valves (PICV)
What They Are:
A hybrid valve that balances flow and controls temperature at the same time.
How They Work:
They adjust flow based on real-time pressure and temperature changes, ensuring efficient operation.
Pros:
Combines balancing and control in one valve.
Maximizes energy efficiency.
Cons:
Pricier than basic valves.
Needs careful setup.
Best For:
High-efficiency HVAC systems.
Complex, multi-zone buildings.
4. Dynamic Flow Limiting Valves
What They Are:
Valves that automatically cap flow at a set maximum rate.
How They Work:
The valve reacts to pressure changes but won’t let flow exceed the preset limit.
Pros:
Keeps system flow balanced without manual input.
Perfect for large, spread-out networks.
Cons:
Can’t handle precise modulating control.
Best For:
Large buildings or district cooling systems.
Systems with lots of branches.
5. Ball Valves with Balancing Features
What They Are:
Dual-purpose valves that combine shutoff and balancing functions.
How They Work:
The ball valve closes the flow, while a small orifice helps regulate balance when open.
Pros:
Saves space and cost.
Ideal for small setups.
Cons:
Limited use in high-pressure or complex systems.
Best For:
Smaller HVAC circuits.
Secondary water loops.
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