In modern industrial fluid control systems, the pressure-reducing valve is a core component protecting equipment safety and stable operation; its performance directly affects productivity, product quality and system safety. As industrial automation and precision manufacturing advance, the market demands ever more from pressure-reducing valves in terms of regulation accuracy, sealing reliability, pressure strength and long-term stability. Ouxun Intelligent Technology (Taizhou) Co., Ltd. has worked in fluid control and pressure inspection for many years, building on national standards and driven by technical innovation, and supplies pressure-reducing valve solutions conforming to authoritative standards such as GB/T 12245 and GB/T 12244 — delivering stable, efficient and safe pressure control for the petroleum, chemical, power, metallurgical, water treatment and pneumatic-hydraulic industries.
1. Led by National Standards: The Core Test Standards for Pressure-Reducing Valves
Quality starts with standards. Every pressure-reducing valve from Ouxun is designed, manufactured and inspected strictly to the latest national standards, of which GB/T 12245 Pressure reducing valves — Methods of performance testing and GB/T 12244 Pressure reducing valves — General requirements are the core technical criteria. The two new versions (GB/T 12245-2025 and GB/T 12244-2025) take effect on 1 May 2026. Ouxun has already completed the corresponding product upgrade and is fully aligned with the new requirements.
1. GB/T 12245-2025 — A Full-Dimensional Performance “Health Check”
This standard specifies test conditions, test methods, performance indicators and assessment rules, and is the authoritative basis for verifying the core performance of a pressure-reducing valve:
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Shell test: verifies body strength. Test pressure is not less than 1.5 times nominal pressure, with no rupture, no leakage and no plastic deformation during the hold period.
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Sealing test: divided into high-pressure and low-pressure sealing, with leakage strictly controlled to ensure zero external leakage and compliant internal leakage, eliminating medium leakage risk.
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Pressure regulation test: tests the regulation range and setting accuracy, confirming that outlet pressure holds at the set value with minimal deviation.
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Flow characteristic test: checks outlet pressure stability at different flow rates; pressure fluctuation must stay within ±5% to ±10%, ensuring regulation under varying conditions.
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Pressure characteristic test: verifies outlet pressure stability when inlet pressure fluctuates, demonstrating strong disturbance rejection.
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Continuous operation test: simulates long-term service through tens of thousands of cycles, confirming no performance degradation and no component wear.
2. GB/T 12244-2025 — Quality Specification Across the Life Cycle
This standard sets out the general requirements for technical specifications, material selection, structural design, inspection rules, marking and packaging:
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Materials: bodies in stainless steel, cast steel and high-quality brass, with adequate strength and corrosion resistance, conforming to pressure-temperature rating rules.
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Structural design: standardised flange connections, sealing faces and face-to-face dimensions for interchangeability.
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Performance indicators: defined reduction ratio, static and dynamic pressure rise, and regulation accuracy to suit mainstream industrial conditions.
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Inspection rules: both factory inspection and type testing — every valve must pass before shipment.
2. Ouxun Pressure-Reducing Valves: Standard Compliance Plus Technical Innovation
Built on deep understanding of the national standards and independent R&D capability, Ouxun pressure-reducing valves combine standard compliance with superior performance. The range covers direct-acting, pilot-operated, diaphragm and piston types, for gas, liquid and steam media, across DN15–DN1200 and PN6–PN160.
1. Core Strengths
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Accurate regulation, minimal fluctuation: a precision diaphragm or piston feedback structure with an optimised flow path holds outlet pressure deviation to ≤±3%, well beyond the standard requirement — suitable for precision instruments and automated lines where pressure is critical.
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Reliable sealing, zero leakage: high-performance seals in FKM, stainless steel and similar materials, validated by the GB/T 12245 sealing test; no ageing and no leakage in long-term service, cutting maintenance cost.
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Robust and long-lived: high-strength cast bodies with precision-machined critical parts, verified by 1.5× pressure testing and ten-thousand-cycle fatigue testing, suited to high and low temperature, high pressure and corrosive environments.
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Adaptable, wide application: customisable regulation range, connection type and material, for petrochemical, power plant, water treatment, compressor and food/pharmaceutical applications.
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Certified to national standards, fully traceable: the whole range follows GB/T 12245 and GB/T 12244, supplied with complete test reports and certificates of conformity in line with national quality and safety regulations.
2. Applications Across Industry
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Chemical industry: controlling pressure of corrosive media to protect reactors and piping systems.
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Power and energy: steam and water treatment systems — stabilising pressure and improving generation efficiency.
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Pneumatics and hydraulics: stable low-pressure power for automation equipment and hydraulic presses.
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Water treatment: pressure control in supply and sewage lines, preventing over-pressure damage.
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Food and pharmaceutical: clean materials and hygienic design for sanitary fluid control.
3. Ouxun: Quality Built on Standards, Market Won on Expertise
Ouxun Intelligent Technology (Taizhou) Co., Ltd. is based in Taizhou, Zhejiang. It is a high-tech enterprise integrating R&D, production, sales and service, focused on fluid control equipment and pressure inspection equipment. The company operates standardised production workshops, precision machining equipment and a dedicated test laboratory, runs to the ISO 9001 quality management system, and maintains full-process quality control from incoming raw material to finished product.
Going forward, Ouxun will continue to follow the development of national standards. Guided by GB/T 12245, GB/T 12244 and other new standards, it will keep optimising pressure-reducing valve performance and increasing investment in technical innovation, to provide customers with better, more reliable and better-matched pressure control solutions — supporting high-quality development in China’s industrial fluid control sector as a pressure-reducing valve manufacturer and service provider you can trust.