How does Frigate recommend verifying valve performance after commissioning?

Frigate balancing valves feature dual test points for differential pressure monitoring. Technicians use this data and calibrated flow charts to verify set flow rates. Readings can be taken without isolating the system or disrupting operation. This allows non-invasive post-commissioning validation and supports long-term maintenance planning.

Balancing Valves

Manual flow balancing without instrumentation leads to prolonged commissioning and inaccurate adjustments. Balancing Valves with integrated measurement ports allow direct pressure differential readings. Using these values and pre-calibrated Kv charts, technicians can determine and set exact flow rates. This eliminates guesswork, ensures alignment with design parameters, and reduces overall commissioning time, particularly in large and complex installations.

Valve Type

Static Hydronic Balancing Valve (Manual, Linear Flow Control Characteristic)

Flow Regulation Method

Variable Orifice with Pre-calibrated Kv Index Scale

Differential Pressure Range

20 kPa to 250 kPa (depending on installation and flow rate requirements)

Hydraulic Authority Recommendation

Minimum 30% of total circuit resistance for stable control

Valve Characteristic Curve

Linear proportionality between handwheel position and Kv value

Product Description

Variable speed pumps introduce fluctuating differential pressures that destabilize circuit flow if not regulated. A balancing valve enforces hydraulic resistance that decouples flow rate from pressure fluctuations. This ensures each branch maintains its assigned flow, regardless of pump modulation or load variation. As a result, the system avoids temperature instability and maintains consistent operation across dynamic load profiles.

Test Point Configuration

Dual integrated pressure ports (ISO 228 G1/4”) for ΔP measurement across valve

Maximum Allowable Flow Velocity

Up to 2.5 m/s for water-based media

Leakage Class (per EN 12266-1)

Class A (Zero leakage under shut-off conditions)

Body Material Options

DZR Brass (CW602N), Stainless Steel (CF8M), or Epoxy-Coated Ductile Iron

Design Pressure Class

Conforms to PN25 with hydrostatic pressure tested at 1.5 × PN rating

Thermal Expansion Compatibility

Suitable for circuits with thermal fluid expansion up to 120°C

Installation Sensitivity

Must be installed in flow direction; sensitive to reverse flow bypass

Control Accuracy

±5% under calibrated system pressure and flow conditions

Position Repeatability

Within ±1 increment on mechanical handwheel indexing scale

Technical Advantages

Excessive flow through unregulated branches increases velocity and turbulence, causing erosion, noise, and cavitation in terminal units and control valves. Balancing Valves impose controlled resistance to limit velocity and reduce pressure drops across coils and exchangers. This prevents mechanical wear, lowers noise levels, and preserves equipment longevity, particularly in high-pressure circuits.

Operational deviations in flow can indicate blockages, airlocks, or pump inefficiencies. Balancing Valves equipped with test points allow for on-site differential pressure measurement and flow verification without system shutdown. This enables maintenance teams to isolate and correct flow anomalies quickly, supporting real-time diagnostics and maintaining operational continuity in critical systems.

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Industry Applications

Chilled Water Distribution Systems

Used to equalize flow across parallel branches in closed-loop chilled water systems, preventing coil underperformance and temperature imbalances.

District Heating Networks

Controls differential pressure in extended loop systems, ensuring stable flow delivery to end users across varying distances and thermal loads.

High-Rise Building HVAC Systems

Balances vertical static pressure differences between floors, maintaining consistent flow through terminal units in tall, multi-story structures.

Industrial Process Cooling Loops

Regulates flow rate to heat exchangers and cooling jackets, preventing thermal inefficiency and component stress in high-demand industrial operations.

Geothermal Energy Systems

Ensures uniform heat transfer by balancing flow across multiple ground loops with differing lengths and thermal conductivity profiles.

Fan Coil and VAV Terminal Units

Controls flow into individual terminal units in variable volume systems, ensuring accurate thermal regulation and preventing coil overflow.

Addressing High-Pressure and High-Temperature Operation

Hydronic systems operating at elevated pressures and temperatures require valves with stable dimensional tolerances and corrosion resistance. Industrial-grade Balancing Valves are constructed with high-strength materials like DZR brass or stainless steel, allowing operation up to PN25 and fluid temperatures above 100°C. This ensures stable valve performance under thermally and hydraulically demanding conditions.

In multi-terminal hydronic systems, inconsistent pressure losses cause disproportionate flow across branches. This results in thermal zones receiving more or less flow than specified. A balancing valve introduces a calculated and stable pressure drop, enabling flow equalization across circuits regardless of their distance from the pump. By setting flow at each terminal to match the design value, the system achieves thermal uniformity and avoids over- or under-heating conditions.

Having Doubts? Our FAQ

Check all our Frequently Asked Question

How does Frigate’s balancing valve help maintain coil ΔT in low-load conditions?

In low-load conditions, flow tends to exceed the design rate, reducing the temperature difference (ΔT) across coils. Frigate’s balancing valves limit this excess flow by imposing controlled resistance. This keeps flow within the coil’s rated range even when pump head increases. As a result, ΔT stays within design limits, improving chiller or boiler efficiency.

Why is balancing valve Cv selection critical in Frigate-designed hydronic circuits?

Incorrect Cv selection leads to either high pressure drop or insufficient flow control range. Frigate uses system-specific pressure and flow data to select optimal Cv values. This ensures the valve operates within the stable linear flow control zone. Proper Cv sizing improves commissioning accuracy and long-term flow regulation.

How do Frigate’s valves interact with differential pressure control valves (DPCVs) in zoned systems?

DPCVs manage dynamic pressure variation, while Frigate’s balancing valves fix branch flow at design values. Installed downstream, Frigate valves act as static limiters. This combination stabilizes individual zone flows under varying demand conditions. It prevents overflow to priority zones and protects terminal performance balance.

Can Frigate’s balancing valves be used in reverse-return piping layouts?

Yes, they are effective in reverse-return systems where branch lengths differ but flow rates must remain identical. Frigate’s valves are installed at each terminal to equalize circuit resistance. This corrects minor hydraulic imbalances that naturally occur due to friction differences. The result is consistent flow without requiring iterative balancing.

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LOCATIONS

Global Sales Office

818, Preakness lane, Coppell, Texas, USA – 75019

Registered Office

10-A, First Floor, V.V Complex, Prakash Nagar, Thiruverumbur, Trichy-620013, Tamil Nadu, India.

Operations Office

9/1, Poonthottam Nagar, Ramanandha Nagar, Saravanampatti, Coimbatore-641035, Tamil Nadu, India. ㅤ

Balancing Valves

Valve Type

Flow Regulation Method

Differential Pressure Range

Hydraulic Authority Recommendation

Valve Characteristic Curve

Product Description

Test Point Configuration

Maximum Allowable Flow Velocity

Leakage Class (per EN 12266-1)

Body Material Options

Design Pressure Class

Thermal Expansion Compatibility

Installation Sensitivity

Control Accuracy

Position Repeatability

Technical Advantages

Let's Get Started

Industry Applications

Addressing High-Pressure and High-Temperature Operation

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Balancing Valves

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