Industry Solutions
HVAC and refrigeration manufacturers use production leak testing to evaluate sealed components and refrigerant circuits before assembly.
Coils, heat exchangers, compressors, valves, fittings, refrigerant lines and manifolds each need a repeatable connection, fixture and test sequence built around the component and manufacturing process.
Air leak testing and trace-gas leak testing are peer options. The appropriate path depends on the component, its internal volume, the manufacturer’s allowable leak target and the production station.
For production helium testing, Z-Charge supplies part preparation and air-test control; Z-Ion supplies helium mass-spectrometer detection. The part, fixture and recipe must be qualified together against the manufacturer’s acceptance requirement.
Request for QuoteHVAC and refrigeration products often combine sealed volumes with intentional flow paths. A useful production test distinguishes those needs and accounts for the part, fixture, added volume and stabilization time.
Zaxis configures production test instruments and fixtures; the manufacturer defines the component acceptance criteria and validates the method for its quality process.
Methods used
Select a method around sealing access, component volume, allowable leak target and the production workflow. Air and trace-gas methods are peer lines—not substitutes by default.
Pressure decay applies air to a sealed component, isolates the source and measures a defined pressure change. Vacuum decay evacuates a sealed component and measures movement back toward atmospheric pressure.
These air methods can support repeatable production decisions when the fixture, settle time and reject target are defined for the component.
Compare pressure and vacuum decay →Mass-flow testing measures gas moving through a connected component against programmed flow values. It can suit components with an intentional path and can be considered when a flow-based approach fits a larger internal volume.
Large volumes require a deliberate test sequence and stabilization plan; the component, fixture and target set the final method.
Read about mass-flow testing →Trace-gas testing fills a sealed part with a measurable tracer and detects gas escaping from the part. Helium, hydrogen forming gas and argon selection follows the allowable leak target, production environment and detection method.
Z-Charge prepares the part and can coordinate gross-leak, pressure-decay and vacuum-decay checks before Z-Ion performs helium detection.
Hydrogen forming gas and argon require detectors compatible with the selected gas. Z-Ion is a helium detector; do not substitute another tracer without confirming the complete configuration.
Explore trace-gas testing →Planning routes for manufactured components, not mandatory methods or acceptance recipes. Air and helium methods are peer choices; helium testing does not guarantee zero lifetime refrigerant loss. Qualify the target, fixture, background and cycle with representative parts.
| Component | Recommended method | Why | Zaxis product |
|---|---|---|---|
| Coils and heat exchangers | Pressure or vacuum decay; helium sniffing or hard vacuum when required | Seal ports, account for internal and fixture volume, and retain access to brazed joints. | Z5 or Z8 for air; Z-Charge + Z-Ion for helium |
| Compressors | Pressure or vacuum decay; selected helium method | Define the sealed boundary and distinguish intended flow paths from leaks. | Z-Charge preparation/air control + Z-Ion helium detection |
| Valves and fittings | Pressure decay or mass flow; helium sniffing for localization | Define valve state, closures and accessible seal faces. | Z1 or Z5 for air; Z-Charge + Z-Ion for helium |
| Refrigerant lines and manifolds | Pressure or vacuum decay; helium sniffing or accumulation as selected | Close each branch repeatably and qualify the added connections and volume. | Z8 for air; Z-Charge + Z-Ion for helium |
Route air applications by port count, fixture, pressure and automation needs. Z-Charge + Z-Ion provides coordinated preparation and helium detection when the helium method fits the validated target. General forming-gas and argon education does not establish Z-Ion detection of those gases.
Z8Modular air leak tester with up to four test ports for configured production testing.
Z5Compact multi-channel air tester for factory stations.
Z1Single-channel air tester for machine integration and cascading test cells.
Z8NAir leak tester option for configured production applications.
Z-Charge + Z-IonCoordinated part preparation and helium leak detection in a trace-gas test cell.A custom fixture can seal ports, control added volume and create a repeatable connection between a component and the tester. For multi-port parts, the fixture and programmed sequence can isolate or test more than one location.
For automated lines, compatible Zaxis platforms offer connectivity options for PLC integration and production data. Confirm interfaces, traceability requirements and test sequence for the specific platform and line.
Coils and heat exchangers require a fixture and sequence that suit their ports and internal volume. Compressors, valves, fittings, refrigerant lines and manifolds similarly need the test connection and target defined for their product function.
For large-volume components, stability matters. The part, fixture and added test volume should be considered together so the programmed test allows the measurement to settle before a production decision is made.
Seal the component to the fixture and verify the connection before gas flows. A configured recipe can run an optional gross-leak, pressure-decay or vacuum-decay screen, then evacuate, purge and charge helium. Z-Charge commands Z-Ion for the selected sniffing, hard-vacuum, accumulation or bomb sequence.
Associate pass/fail, recipe ID, charge parameters and detector result with the part record. Confirm the PLC interface and data mapping; available communications do not by themselves establish a complete MES implementation. Hard-vacuum work requires an external vacuum source, and chamber/tooling, handling and any recovery equipment belong in the confirmed scope of supply.
For application review, provide the drawing or sample, ports and sealed boundary, internal and fixture volume, allowable pressure/vacuum, leak target and units, refrigerant/test conditions, cycle time, loading plan and required records. Qualify background control, calibration and representative good/defective parts before release. No universal helium requirement, throughput or recovery yield is assumed.
Air leak testing includes pressure decay, vacuum decay and mass flow. Trace-gas leak testing uses a measurable tracer. A component is not assigned to one family by its industry alone: the final selection follows access, volume, allowable leak target, fixture and production requirements.
Zaxis supports both product lines. Application engineering can help connect the manufacturer’s required target to the appropriate instrument, fixture and sequence.
Production test planning can pair coil and heat-exchanger ports, volume and leak target with a configured air or trace-gas method.
Sealed compressor, valve and fitting assemblies can use a fixture and test sequence selected around access and the manufacturer’s acceptance criteria.
Connected refrigerant lines and manifolds may use a pressure, vacuum, flow or tracer approach selected around the circuit and production requirement.
It is production testing of HVAC and refrigeration components such as coils, heat exchangers, compressors, valves, fittings, refrigerant lines and manifolds using a method and fixture selected for the component.
Pressure decay, vacuum decay, mass flow or trace gas can be considered depending on the component’s access, internal volume, allowable leak target and production requirements. The manufacturer validates the final method and acceptance criteria.
Mass flow can be considered for an intentional flow path or when a flow-based approach fits a larger-volume component. The test sequence needs suitable stabilization time for the part and fixture.
Trace gas can be considered when a measurable tracer and the selected detection method fit the manufacturer’s required leak target. Air and trace-gas testing are peer production methods.
A fixture seals the component, controls added test volume and provides repeatable connections. It can also close multiple openings or support a multi-port sequence.
Compatible platforms offer connectivity options for PLC integration and production data. Confirm the interface and traceability approach for the selected platform and line.
