In Yuhuan you often hear veteran valve makers say: “I have been making ball valves for twenty years — dip it in water and watch for bubbles, and I know whether it leaks.” But with new-energy automotive parts and liquid cooling growing fast, and with today’s demands for high accuracy and short cycle times, can the traditional water test really still do the job? As an air-tightness inspection equipment manufacturer rooted in Taizhou and serving customers nationwide, Ouxun Intelligent Technology (www.ouxun-tech.com) explains how to choose an inspection solution that suits each application.
1. Valve Industry: Moving Beyond Bubbles to Data
Yuhuan is known as China’s valve capital, and valve inspection is the foundation of local manufacturing.
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Traditional pain points: the water test is intuitive, but drying costs are high, human judgement varies, and micro-leakage cannot be detected. In winter, residual water freezing and cracking valves is a recurring headache.
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Ouxun solution: for common ball, gate and butterfly valves we recommend differential-pressure air-tightness testers.
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Advantages: dry testing with no drying stage, and quantified results — leakage reported precisely in mL/min.
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Case: for high-pressure valves, Ouxun supplies dedicated benches at higher pressure ratings, configured to requirement, that simulate real service conditions and confirm the valve stays tight under pressure.
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2. Automotive Parts: Housings and Lines, Nothing May Leak
As vehicles become lighter and electrified, automotive structural parts are growing more complex.
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Challenge: engine blocks, transmission housings, fuel rails and coolant lines are irregular in shape and large in volume, often with several ports to seal simultaneously.
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Ouxun solution:
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Multi-channel parallel testing: our equipment supports multi-channel expansion with custom fixtures for complex parts, sealing and testing several ports at once to raise line throughput.
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Anti-interference technology: large housings expand and deform during pressurisation, causing pressure fluctuation. Ouxun equipment applies dedicated algorithmic compensation to prevent false rejects — good parts are not scrapped, and leaking parts do not pass.
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3. Liquid Cooling: Guarding the “Blood Vessels” of the New Energy Era
Cold plates, water-cooled plates and energy-storage piping are critical components in EVs and storage systems. Any leak that lets coolant into a battery pack has unthinkable consequences.
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High requirements: the liquid cooling industry demands extremely low leak rates, typically 10⁻³ Pa·m³/s or better.
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Ouxun solution:
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Helium mass spectrometry (optional): for extremely small leaks we offer helium leak detection with industry-leading sensitivity.
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Flow method: for components such as liquid cooling lines where a small amount of leakage is tolerable, we recommend flow-method testers that read leak flow directly — fast, and effective at cancelling out temperature and deformation effects.
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Vacuum chamber method: for cold plates and similar parts that must be tested under vacuum, we supply fully automatic vacuum chamber equipment with a stable test environment.
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4. Why Customers in Yuhuan and Across China Choose Ouxun
As a company grown up in Taizhou, we understand local manufacturing while serving customers nationwide.
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Technology that works on the floor: we do not simply sell machines. We combine algorithm expertise with the rich manufacturing scenarios of Yuhuan and Taizhou, producing equipment that is stable and durable, with an interface simple enough for an experienced operator to read at a glance.
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Customisation: whether it is a special valve thread or an irregular automotive part, we supply custom non-standard tooling — one fixture per part.
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After-sales service: based in Taizhou, serving the whole country. We maintain a service network in major industrial cities with a 24-hour response commitment, and offer rapid on-site support for Yuhuan customers.
In Closing
Air-tightness inspection is not simply “pump it up and see if it leaks”. It is a systems engineering discipline combining fluid mechanics, precision manufacturing and automatic control.
If you are looking for an efficient, accurate air-tightness solution for valves, automotive parts or liquid cooling products, contact Ouxun Intelligent Technology. We provide free sample testing — let the data prove the value.
About Ouxun
Ouxun Intelligent Technology (Taizhou) Co., Ltd.
Website: www.ouxun-tech.com
Core business: air-tightness inspection equipment | dedicated machines for the valve, automotive and liquid cooling industries | custom automated production lines
Service coverage: rooted in Yuhuan, serving the whole of China