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Secondary Fluid Network (SFN)
CDVL delivers complete Secondary Fluid Network (SFN) fabrication, installation, testing and commissioning for high-density liquid cooling environments. Our systems are engineered around 100% stainless steel, off-site fabricated, sanitation-grade piping infrastructure designed for mission-critical data center operations.
The purpose of the SFN is to provide safe, stable and contamination-free coolant distribution between Cooling Distribution Units (CDUs) and liquid-cooled racks. Every network is designed for overhead-only deployment, compatibility with non-proprietary CDU interfaces and modern data center environments without raised floors.
Built in accordance with ASME B31.3, ASTM A270, ASTM A380, and ASTM A967 standards, our SFN solutions deliver reliability, cleanliness and long-term operational performance for next-generation AI and high-performance computing facilities.
Mechanical Services
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CDU supply and return connections form the primary source of coolant circulation
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Common stainless steel headers up to 6 MW capacity using Sch 10S SS304L construction
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Hot aisle branch networks, 4” and below fabricated using sanitary-grade stainless steel tubing
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Rack stems, 2” stems equipped with isolation valves
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Full network color standardization with blue supply lines and red return lines for
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operational clarity
SFN Network Architecture
Approved Materials
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SS304, SS304L, SS316 and SS316L piping, fittings and valves
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Peroxide-cured EPDM
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PTFE and PTFE-lined components
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Viton, Buna-N and Neoprene sealing materials
Restricted Materials
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Aluminum and magnesium
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Sulphur-cured elastomers
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Brass containing more than 15% zinc
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Leaded alloys and non-stainless steels
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PVC, FEP, nylon and titanium
Materials & Compliance
Design & Architecture
Infrastructure & Intelligence
Design & Architecture
Delivery & Performance
Automation & Smart Airport Infrastructure
Mechanical Services
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Smart HVAC & Ventilation Systems
Delivering climate precision and air quality across terminals, ATC towers, and hangars.
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High-efficiency HVAC for large-scale airport environments
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Pressurization and filtration systems for enclosed zones
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AI-driven climate control for comfort and energy optimization
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CFD (Computational Fluid Dynamics) modeling for airflow accuracy
: Achieved a 30% reduction in HVAC energy usage, ensuring comfort with lower operational costs.
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Advanced Baggage Handling & Conveyor Systems
Optimizing baggage flow, tracking, and energy use through automation.
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AI-integrated conveyor belt and baggage tracking systems
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Controlled airflow to prevent conveyor belt overheating
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Energy-efficient motors and smart controls
Our Edge: Reduced baggage mishandling by 40%, improving security and passenger satisfaction.
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Fire Protection & Emergency Ventilation
Engineered for safety in high-traffic, high-risk environments.
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NOVEC 1230 and FM-200 suppression for terminals & control rooms
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VESDA-based early smoke detection
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Intelligent emergency ventilation and fire exit systems
Our Edge: Reduced emergency response time by 50%, enabling quicker evacuation and safety control.
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Stainless steel piping systems using solution-treated SS304L and SS316L
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Precision valves and flow setters for thermal balancing
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Air bleed valves for effective high-point venting
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Vibration-resistant support and mounting systems
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Flexible connections using peroxide-cured EPDM and PTFE-lined braided stainless steel hoses
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Integrated isolation and serviceability features throughout the network
Components & Infrastructure
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418 Pressure transmitters (0-16kg/cm²)
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418 Differential pressure monitoring points
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High-accuracy (+_0.54°) RTDs installed on supply and return circuits
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Rope-based and spot leak detection sensors at all rack and CDU locations
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Test Points - 52 universal charging/monitoring ports
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4-20 mA instrumentation architecture
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NRTL-listed components compliant with CE, UL and CSA requirements
Monitoring & Leak Detection
Infrastructure & Intelligence
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ASME B31.3 compliant fabrication procedures
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Certified stainless steel welders only
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GTAW/TIG autogenous welding with orbital welding preferred
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100% visual weld inspection, 5% volumetric
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Burr removal, oxide-free finish
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Burr-free, oxide-free surface preparation
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Pre-rinse, 10% citric acid circulation, Final DI rinse
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Turbidity <20 NTU
Fabrication & Welding Standards
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Pre-rinse cleaning procedures- Distilled water circulation + 25-micron filtration
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Citric acid passivation in accordance with ASTM A967
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Deionized water rinsing and validation
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Turbidity-controlled cleaning procedures
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Distilled water circulation with fine filtration• Final flushing- Until turbidity <1 NTU, pH 6.5-8.0
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Controlled drying using ISO 8573.1 Class 2 dry air and Grade - 5 Nitrogen
Passivation, Cleaning & Quality Assurance
Manufacturing & Quality
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Air Pressure Test- 25 psi, 60-minute hold, No pressure loss allowed
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Hydrostatic testing at 1.1 times design pressure
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Full visual inspection during stabilization
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Coolant charging using DOWFROST LC25
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Filtration-assisted commissioning procedures
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System flushing across all rack stems- 15-20 GPM per stem
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Turbidity <1 NTU target
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CDU connection verification and thermal bracing validation
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Design pressure confirmation and operational readiness checks
Testing & Commissioning
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150 psi system design pressure
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12 max rack connections per header section
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15 GPM minimum dead-leg flushing flow
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$1% pressure transducer accuracy
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Turbidity <1 NTU after final flush
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Minimum dead-leg flushing requirements• High-accuracy pressure monitoring
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Strict coolant cleanliness validation targets
Performance & Engineering Excellence
Delivery & Performance
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Powering data-driven decision-making and predictive maintenance.
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SCADA-controlled HVAC and electrical systems
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AI enabled predictive maintenance for terminal and runway equipment
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IoT-enabled access control and security systems
Our Edge: Reduced operational downtime by 40% with real time automation.
SCADA, IoT & AI BASED MONITORING
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Creating a seamless, congestion-free passenger experience.
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Automated passenger counting and traffic management
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AI-based boarding gate allocation systems
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Automated Smart self-check-in and baggage drop systems
Our Edge: Increased passenger flow efficiency by 35%, reducing wait times and improving airport capacity.
PASSENGER & BAGGAGE FLOW OPTIMIZATION
Automation & Smart Airport Infrastructure
Electrical Services
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Power Distribution & Grid Resilience
Building uninterrupted power systems for mission-critical operations.
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HV & LV power distribution systems for terminals, runways, and control towers
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Redundant UPS and generator systems for reliability
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Smart grid monitoring through SCADA systems
Our Edge: Ensured 99.99% uptime, preventing power-related disruptions in flight schedules.
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Energy-Efficient Lighting Solutions
Enhancing visibility, safety, and sustainability across airport zones.
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LED runway and taxiway lighting with real-time brightness control
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AI optimized terminal lighting that adapts to foot traffic
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Motion activated smart lighting for lounges and terminals
Our Edge: Lowered lighting energy consumption by 35%, improving visibility and safety.
Plumbing & Utility Systems
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Water Management & Wastewater Treatment
Enabling smart water conservation and recycling at scale.
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Smart rainwater harvesting and reuse systems
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Advanced RO systems for potable water
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Zero Liquid Discharge (ZLD) wastewater recycling
Our Edge: Reduced water waste by 30%, supporting airports’ long-term sustainability goals.
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Fueling & Hydrant Systems
Delivering safe and efficient aviation fueling operations.
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Advanced hydrant systems for quicker aircraft turnaround
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Leak detection for fuel pipeline safety
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Explosion-proof valves and pumps
Our Edge: Improved fueling efficiency by 25%, reducing aircraft turnaround time.
Automation & Smart Airport Infrastructure
SCADA, IoT & AI-Based Monitoring
Powering data-driven decision-making and predictive maintenance.
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SCADA-controlled HVAC and electrical systems
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AI enabled predictive maintenance for terminal and runway equipment
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IoT-enabled access control and security systems
Our Edge: Reduced operational downtime by 40% with real time automation.
Passenger & Baggage Flow Optimization
Creating a seamless, congestion-free passenger experience.
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Automated passenger counting and traffic management
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AI-based boarding gate allocation systems
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Automated Smart self-check-in and baggage drop systems
Our Edge: Increased passenger flow efficiency by 35%, reducing wait times and improving airport capacity.
Sustainability & Renewable Energy Integration
Green Energy & Carbon Reduction
Supporting the global shift toward net-zero aviation infrastructure.
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Solar and wind energy integration for terminal operations
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Battery Energy Storage Systems (BESS) for load balancing
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Smart grid integration with energy-efficient HVAC
Our Edge: Achieved a 40% carbon footprint reduction, leading the way in green airport design.
Industry Trends & Market Insights
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$1.5 Trillion global investment in airport infrastructure by 2035
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Rising adoption of AI-based smart airport systems
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Strong focus on net-zero, sustainable energy solutions
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Expansion of automated baggage and security technologies
What Sets Us Apart!
CDVL combines years of stainless steel fabrication expertise with advanced thermal infrastructure engineering for modern liquid-cooled data centers. Our capabilities extend beyond Secondary Fluid Networks to include stainless steel buffer tanks, expansion vessels, pressure control systems, heat exchanger housings, cooling distribution units, immersion cooling tanks and integrated thermal assemblies. Every solution is built using sanitation-grade manufacturing practices, complete material traceability, off-site modular fabrication, and globally recognized testing standards. Through our collaboration with Schneider Electric, we integrate high-quality fabrication with advanced controls, automation and system intelligence. The result is a complete, high-integrity liquid cooling ecosystem designed to support the growing demands of AI, HPC and next-generation data center infrastructure.
