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Cleanroom Testing and Validation Instruments
Duct Leakage Tester
A portable positive/negative duct leakage tester with variable blower, calibrated flow measurement and automatic pressure control for HVAC commissioning.
- Controlled positive and negative duct pressurization.
- Calibrated leakage-flow measurement.
- Portable integrated field test system.
Product Introduction
This self-contained tester connects to an isolated duct section, raises or lowers it to a defined pressure and measures the airflow required to hold that condition. A variable-speed blower, calibrated inlet and dual pressure channels allow the controller to calculate leakage rate during positive or negative tests. The wheeled enclosure and flexible test hose support field commissioning across large installations.
Key Features
Closed-loop control maintains the selected test pressure.
Calibrated inlet measurement quantifies stabilizing leakage airflow.
Dual pressure channels monitor duct pressure and flow element.
Guided controller calculates leakage rate and test duration.
Wheeled field enclosure organizes hose, cables and adapters.
Customer Product Concerns
Duct leakage must be quantified at a stable specified pressure even though the system response changes with seal quality, section size and test direction.
Test pressure drifts as leakage changes during the run.Closed-loop blower control continuously adjusts flow to maintain the selected pressure.
One-direction equipment cannot assess both supply and extract ductwork.A reversible flow arrangement supports positive and negative pressure tests.
Leakage calculations vary when technicians use separate instruments.Integrated pressure and calibrated-flow channels calculate leakage within one guided workflow.
Large test equipment is difficult to move through an active site.A compact wheeled enclosure and stored flexible hose simplify relocation between duct sections.
Typical Applications
Cleanroom supply-duct leakage testingExhaust and return duct commissioningNew ductwork quality verificationPost-repair airtightness checksHVAC leakage-class documentation
Technical Parameters
Representative portable leakage-tester construction is shown below; blower capacity, calibrated flow range and hose size can be selected for the duct sections under test.
| Core Material | Variable-speed centrifugal blower, calibrated flow nozzle, pressure sensors and powder-coated steel enclosure |
|---|---|
| Panel Thickness | Typically 1.0-2.0 mm for the steel cabinet panels |
| Effective Width | Approximately 450-650 mm across the mobile enclosure |
| Maximum Length | Approximately 700-1000 mm including wheeled cabinet and stored hose |
| Steel Facing Thickness | Typically 1.0-2.0 mm for powder-coated steel enclosure panels |
| Core Density | Approximately 7850 kg/m³ for structural steel components |
| Thermal Conductivity | Approximately 45-55 W/(m·K) for structural steel components |
| Surface Finish | Safety-yellow powder-coated cabinet with graphite controls, black hose and stainless fittings |
| Joint Type | Cam-lock flexible duct connection with sealed calibrated inlet and barbed pressure taps |
| Customization | Available based on the intended application and operating environment. |
Available Options
Low- or high-flow configurationPositive/negative test modeMultiple calibrated flow nozzlesFlexible connection hose sizesReport download and printingProtective transport cover
Planning a Duct Leakage Tester specification?
Send us your dimensions, installation conditions, performance targets and required surface finish.
