As Industry 4.0 and smart manufacturing advance, valves — the core components of fluid control systems — directly affect the safety, energy consumption and operating efficiency of the entire pipeline. Whether in petrochemicals, power generation, HVAC, water treatment, or the rapidly growing field of energy-storage liquid cooling, the requirements for testing valve flow coefficient (Cv/Kv), flow resistance coefficient, tightness and pressure loss have reached unprecedented levels of precision.
Ouxun Intelligent Technology (Taizhou) Co., Ltd., an established company in fluid inspection, has drawn on years of technical accumulation and continuous R&D to launch industry-leading flow and differential-pressure test benches and flow resistance benches, giving valve manufacturers and research institutes a complete valve flow testing solution.
Why High-Precision Flow, Differential Pressure and Flow Resistance Testing Matters
In the past, many companies relied on experience or simple equipment to estimate valve performance. That may still pass in the low-end market, but for high-end applications and export compliance it carries growing risk.
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Flow differential pressure is the basis for calculating a valve’s flow coefficient. Even a small error in differential pressure measurement can skew the calculated coefficient significantly and lead to incorrect valve selection.
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Flow resistance characteristics relate directly to system energy consumption. A well-designed low-resistance valve can cut pumping cost substantially — but assessing flow resistance accurately is only possible with a dedicated test bench.
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Compliance requirements: standards at home and abroad (ISO 5208, API 598, GB/T 13927 and others) place increasingly strict demands on traceability, repeatability and accuracy of valve test data. Without reliable test methods, compliance is hard to achieve.
Ouxun Intelligent Technology: Setting a New Standard for Valve Flow Testing
With years of experience in valve, HVAC and sanitary ware inspection, Ouxun understands the practical requirements at every stage, from sample validation in development to final inspection on the production line. Its self-developed flow and differential-pressure benches and flow resistance benches are not simply test machines — they are data-centred quality management systems.
1. Flow and Differential-Pressure Bench: Capturing the Smallest Changes
Designed for high-precision flow testing of control valves, globe valves, ball valves, butterfly valves and other types.
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Ultra-high-precision sensing: imported high-precision differential-pressure transmitters and flow meters acquire stable data even at very low flow or high differential pressure, with accuracy above the industry norm.
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Wide range coverage: a modular design adapts from micro-control precision valves to large-diameter industrial valves, covering most application scenarios.
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Intelligent flow stabilisation: an advanced PID algorithm regulates the pump set and surge tank automatically, cancelling flow pulsation and keeping flow and pressure steady throughout the test, closer to real service conditions.
2. Dedicated Flow Resistance Bench: Measuring Every Pressure Loss
For the demanding energy efficiency requirements of HVAC and fluid transport systems, Ouxun’s flow resistance bench plots the valve’s resistance curve precisely.
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Multi-condition simulation: continuous testing at different openings and flow rates, automatically generating curves of the resistance coefficient (ζ) and flow coefficient (Cv/Kv).
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Visual data analysis: the supplied software generates test reports in real time, showing the pressure loss distribution clearly and helping engineers optimise plug geometry and flow path design.
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Automated test sequence: one-button start runs the whole sequence automatically, reducing operator error and raising inspection throughput — well suited to sampling and final inspection in volume production.
3. A Complete Valve Flow Test Package
Ouxun supplies not only individual machines but complete, customised valve flow test systems:
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Gas and liquid media: supports liquid circuits (water, oil) and gas circuits (air, nitrogen) to cover a wide range of test media.
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International standards compliance: equipment design and test procedures follow ISO, API, ANSI, GB and other major standards, helping companies pass third-party certification.
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Data traceability and cloud management: test data uploads automatically to a local server or the cloud, with QR-code traceability that helps companies build a digital quality archive.
Applications Across Industries
Ouxun inspection equipment is already in use in several key sectors:
| Sector | Application |
|---|---|
| Industrial valve manufacturing | Helps valve companies in the oil, chemical and power industries strengthen product competitiveness |
| HVAC | Accurate flow resistance and flow characteristic verification for balancing and thermostatic valves, supporting lower building energy consumption |
| New energy storage | High-reliability testing of critical valves in energy-storage liquid cooling systems, safeguarding battery thermal management |
| Research and inspection bodies | High-precision research-grade test platforms for university laboratories and third-party inspection institutes |
Conclusion
As precision requirements in fluid control continue to rise, a high-performance flow and differential-pressure bench or flow resistance bench is no longer just standard laboratory equipment — it is a key support for technical innovation.
Ouxun Intelligent Technology (Taizhou) Co., Ltd. stays customer-focused and keeps pushing technology forward, aiming to become a leading global provider of fluid inspection solutions.
If you are looking for professional valve flow test equipment, or considering an upgrade to your existing inspection system, Ouxun is a partner you can trust. Let us work together to protect the safety and efficiency of every drop of fluid with accurate data.
Contact Us
For more information or a customised proposal, visit the Ouxun Intelligent Technology (Taizhou) Co., Ltd. website or contact our technical team directly.
Let professional testing be the strongest endorsement of your product quality.