Automotive Four-Way Valve Helium Leak Testing System for Ultra-Low Leak Rate Detection and Smart Production Lines

In today's automotive HVAC and heat pump industry, leak-free performance is no longer a quality advantage—it's a basic requirement.

A microscopic leak in a four-way valve can lead to refrigerant loss, reduced cooling efficiency, warranty claims, and even production recalls. Traditional pressure decay methods often struggle to detect ultra-small leakage points, leaving manufacturers exposed to quality risks.

The HeJin Four-Way Valve Helium Leak Testing System is engineered to identify leaks at the micron level before products leave the factory, helping manufacturers achieve higher product reliability, lower rejection rates, and stronger market competitiveness.

Designed and manufactured by HeJin, this intelligent leak testing solution combines helium mass spectrometry technology, automated process control, and customized fixture engineering to deliver stable, repeatable, and traceable testing results.

As refrigerant systems become more efficient and environmentally regulated, leak detection requirements continue to increase.

Manufacturers face several challenges:

• ❌ Traditional pressure decay testing cannot reliably detect micro-leaks.
• ❌ Inconsistent testing results between operators.
• ❌ High warranty costs caused by undetected leakage.
• ❌ Increasing requirements from OEM customers.
• ❌ Lack of production data traceability.
• ❌ Difficult integration with smart factories.

HeJin addresses these challenges with a fully automated helium leak testing solution built for modern manufacturing.

Most leak testing equipment suppliers simply integrate standard leak detectors into a machine frame.

HeJin takes a completely different approach.

We develop the complete testing solution, including:

• Leak testing process design
• Fixture sealing technology
• Vacuum system optimization
• Automation integration
• MES communication
• Helium recovery solutions
• Production line customization

Because we are the original manufacturer, customers work directly with the engineering team that designs and builds the equipment.

No middlemen.

No communication gaps.

No generic solutions.

Only a customized system designed around your product.

Detect leakage levels beyond the capability of conventional pressure testing methods.

This allows manufacturers to identify hidden defects before assembly or shipment.

• Lower product failure rates
• Improved product reliability
• Reduced warranty expenses

The system automatically performs:

• Vacuum evacuation
• Helium charging
• Leak detection
• Result judgment
• Data recording
• Product sorting

• Reduced labor dependency
• Higher throughput
• Consistent testing quality

Production data can be connected to MES and factory management systems for complete traceability.

Every tested component can be linked to:

• Production batch
• Operator
• Testing parameters
• Leak rate results
• Production date

• Easier quality audits
• Faster root-cause analysis
• Enhanced customer confidence

Unlike standard leak testers, HeJin designs fixtures according to the customer's valve structure, dimensions, and production requirements.

This ensures:

• Better sealing performance
• Faster cycle times
• Higher repeatability
• Lower maintenance costs

The system is widely used for:

• Four-Way Valves
• Electronic Expansion Valves
• Solenoid Valves
• Refrigerant Control Valves

• Reversing Valves
• Refrigerant Distribution Components

• Compressor Assemblies
• Refrigerant Circuit Components
• Precision Sealed Parts

• Pressure Control Devices
• Gas Control Components
• Precision Valve Assemblies

The HeJin system can identify:

• ✓ Gross Leaks
• ✓ Micro Leaks
• ✓ Seal Failures
• ✓ Weld Defects
• ✓ Brazing Defects
• ✓ O-Ring Leakage
• ✓ Assembly Leakage
• ✓ Internal Channel Leakage
• ✓ Vacuum Integrity Problems
• ✓ Pressure Retention Failures

• Helium Mass Spectrometry Detection
• High-Efficiency Vacuum Technology
• Intelligent PLC Control Architecture
• Customized Sealing Fixture Engineering
• Smart Manufacturing Data Platform

For more than a decade, HeJin has focused on developing automated testing solutions for automotive and refrigeration industries.

Our capabilities include:

Custom machine design and software development.

Full control over quality, lead time, and costs.

From concept design to installation and commissioning.

Remote diagnostics, online training, and technical assistance.

We support equipment upgrades, optimization, and spare parts supply throughout the equipment lifecycle.

Yes. Helium leak testing can detect significantly smaller leakage rates, making it ideal for high-quality automotive and refrigeration products.

Yes. The system can be connected to conveyors, robots, MES platforms, and smart factory systems.

Yes. Every fixture is designed according to the customer's actual product.

Yes. Optional helium recovery systems can significantly reduce operating costs.

Yes. HeJin provides global technical support and commissioning services.

As the original manufacturer, HeJin provides direct spare parts support without third-party delays.

When product reliability directly impacts your brand reputation, leak testing cannot be left to chance.

The HeJin Four-Way Valve Helium Leak Testing System delivers the sensitivity, automation, and production stability required by today's automotive and refrigeration manufacturers.

Contact our engineering team today to discuss a customized leak testing solution tailored to your production requirements.