The general machinery and manufacturing industry covers a wide range of products, including various mechanical components, hydraulic and pneumatic elements, valves and fittings, radiators, housing structures, and more. These products have diverse sealing performance requirements, and leak testing is a critical step in ensuring product quality and reliability. With its high-precision detection capability, selectable multiple ranges, and flexible customization options, the AMT air tightness tester provides reliable leak testing solutions for the general machinery and manufacturing industry.

I. Core Application Areas in General Machinery

1. Testing of Castings and Weldments

Casting and welding are the most common processes in general manufacturing. These products often have defects such as pores, sand holes, and cracks, requiring leak testing.

The AMT series instruments can be used for testing castings, blow-molded parts, weldments, bonded parts, sealed workpieces, threaded connection parts, stamped parts, and assembled parts. They feature high-performance dedicated CPUs and 24-bit A/D conversion to ensure testing accuracy and stability.

2. Hydraulic and Pneumatic Components

Hydraulic and pneumatic components have extremely high sealing requirements, as leaks directly affect system performance and safety.

The AMT series instruments have a standard pressure sensor range of 0-4 bar, with optional ranges covering -1 bar to 20 bar, and custom ranges available for higher pressure requirements. The differential pressure sensor resolution is 0.01 Pa, meeting high-precision testing requirements.

3. Valves and Pipe Fittings

Valves and pipe fittings are fundamental components of fluid control systems, and sealing directly affects system reliability.

For products such as malleable iron pipe fittings, a multi-station testing solution is available: after manual placement of workpieces, pneumatic cylinders clamp and seal them, compressed air is applied, and a water tank rises to immerse the workpieces for bubble observation. Test pressure can reach 0.5–1.6 MPa, with hold times ranging from 5 seconds to 30 minutes.

4. Radiators and Heat Exchangers

Heat exchange components such as radiators, condensers, and heat exchangers have strict sealing requirements, as leaks lead to efficiency loss.

The radiator leak testing equipment uses PLC-controlled pneumatic cylinders to automatically clamp workpieces, providing firm and accurate positioning without damaging the workpiece. Tooling includes position sensors to detect whether the core is correctly placed; if not, the device emits an audible alarm.

5. General Components

The air spring leak tester is mainly composed of a frame, air circuit system, testing device, and electrical control system, capable of performing air tightness tests and pressure holding tests on air springs. The filter element leak tester uses a differential pressure testing method to intelligently test and judge the sealing quality of the product.

II. Testing Methods and Selection Guide

General machinery products come in many varieties with diverse testing requirements. AMT offers multiple testing methods:

Pressure sensor optional ranges: Standard range 0-4 bar; other options include -1–0 bar, 1 bar, 6 bar, 10 bar, 12 bar, 15 bar, 20 bar; other ranges available on request.

Flow sensor optional ranges: 5 ml/min, 25 ml/min, 50 ml/min, 100 ml/min, 200 ml/min, 500 ml/min, 1000 ml/min, 2000 ml/min, 5000 ml/min; other ranges such as 10 L/min, 20 L/min, 50 L/min are also available.

For products without an inflation port, such as stamped parts, custom profile tooling is required to enclose the product, holding it securely and protecting its appearance. Controlled air pressure is applied through the tooling to the product surface, with the system strictly controlling air pressure to avoid product deformation caused by excessive pressure.

III. Core Advantages of the AMT Air Tightness Tester

1. High Precision and High Stability
The AMT series uses high-quality sensors and valve groups, equipped with a high-performance pneumatic system and embedded computer technology. Differential pressure sensor resolution reaches 0.01 Pa. High-performance dedicated CPUs with ARM CORTEX-A8 core, frequency 800 MHz, dual CPU configuration, and 4000V electrostatic discharge protection ensure high reliability and stability.

2. Multiple Testing Methods
The AMT series supports various testing methods: positive pressure testing, negative pressure testing, pressure decay testing, differential pressure testing, flow testing, and more. Users can choose according to their needs.

3. Intelligent Data Management

• Storage for 100 test programs, multi-level password protection

• Storage for up to 1 million test results, USB automatic export to Excel format

• Real-time SPC quality analysis: total tests, pass rate, average of qualified products, and more

• Real-time test curve display, real-time monitoring of pressure and time status at each stage

4. Flexible System Integration

• Rich I/O interfaces: 37-pin I/O output, 25-pin I/O input, 24V, connectable to PLC and other external controls

• Multiple communication methods: RS232 serial port, Ethernet, optional WiFi/Profinet/Profibus

• Can connect to MES systems for real-time traceability of test data

5. User-Friendly Operation

• 7-inch LCD touchscreen, visible under sunlight

• Start/stop buttons with built-in pass/fail indication (green/red light ring)

• Bilingual Chinese/English interface, suitable for export equipment

IV. Advantages of AMT Solutions

1. Full Process Coverage
From component-level testing to complete machine air tightness re-inspection, from R&D validation to production line inspection, AMT provides leak testing equipment for the entire lifecycle of general machinery products.

2. Non-Standard Customization Capability
For special conditions such as irregularly shaped products, multi-station requirements, and automated line integration, custom fixtures and testing solutions are available. Drawing on modular design concepts, the control/detection module is separated from the positioning/sealing module, allowing quick adaptation to multiple product specifications by changing tooling.

3. Rapid Local Service
Adhering to the service philosophy of "rapid response, mission accomplished," AMT provides 7×24 hour technical support to customers.

V. Conclusion

In the general machinery and manufacturing industry, leak testing has evolved from a traditional "quality control" step into a core pillar of "quality assurance + production efficiency." Whether it is identifying micro-leaks in castings and weldments or verifying precise sealing of hydraulic and pneumatic components, the AMT air tightness tester, with its professional spirit of "leading technology and continuous improvement," provides reliable, accurate, and efficient leak testing solutions for the general machinery and manufacturing industry, helping customers realize the vision of "making manufacturing smarter."

If you have leak testing needs in the general machinery and manufacturing field, please contact our engineers for a customized solution.