The role of large-size check valves in industrial systems

I. Core functions and basic characteristics
‌Anti-backflow control‌
Big Size Check Valve (nominal diameter ≥ DN300) uses a one-way flow design and relies on the kinetic energy of the medium to automatically open and close the valve disc, effectively preventing fluid backflow, avoiding pump reversal, pipeline water hammer and equipment damage‌16. Its lack of external power dependence simplifies the system control logic and reduces the complexity of operation and maintenance‌35.

‌System safety assurance‌
In high-pressure and high-flow scenarios (such as oil pipelines), Big Size Check Valve uses high-strength valve body materials and precision sealing structures to block the risk of medium backflow and ensure the continuity and safety of the production process‌13.

II. Typical industrial application scenarios
‌Petrochemical field‌
In 15MPa high-pressure crude oil pipelines, DN600 swing check valves prevent oil backflow and ensure safe operation of pump units‌13.
The concentrated sulfuric acid storage and transportation system uses Hastelloy valve bodies to achieve a 40-year record of no corrosion and leakage‌14. ‌Energy and Power System‌

In the high-temperature steam pipeline of the 540℃ supercritical unit, nickel-based alloy valves ensure the stable operation of the turbine‌46.
The nuclear reactor cooling circuit adopts a fully sealed lifting structure to meet the ASME NPT nuclear grade certification standard‌34.
‌Municipal and Environmental Protection Engineering‌

DN800 butterfly check valve is used in water plant pump stations to reduce pipeline vibration noise and energy loss‌34.
The sewage treatment system is equipped with rubber lined valve discs to resist hydrogen sulfide corrosion and extend equipment life‌34.
IV. Technology Evolution Direction ‌Intelligent Upgrade‌
Integrate vibration sensors and Internet of Things modules to achieve real-time monitoring of valve status and remote fault warning (such as sealing surface wear, opening and closing delays, etc.)‌46.

‌Material and Process Innovation‌
3D printing technology manufactures streamlined valve chambers, reducing pressure loss by 15%-20%; titanium-nickel composite alloys further reduce weight and improve corrosion resistance‌34.

Large-size check valves are deeply integrated with technological innovation and industrial needs, continuously providing the modern industrial system with triple value of high-pressure protection, energy efficiency optimization and system stability guarantee.