Welded Butterfly Valve DN50 Price – High Pressure Steam Pipeline
This article provides a comprehensive 2026 price reference and outlines the essential selection parameters for a DN50 welded butterfly valve used in high-pressure steam pipelines.The main Butterfly Valve product names of China Butterfly Valve Network include:Manual Soft-sealed Wafer Butterfly Valve,Manual Single Eccentric Wafer Butterfly Valve,Manual Ventilation Butterfly Valve,ManualDesulfurization Wafer Butterfly Valve,Oversized Electric Soft-sealed Flange Butterfly Valve,Pneumatic Metal Hard-sealed Wafer Butterfly Valve,Pneumatic Hard-sealed Flange Butterfly alve,Pneumatic Soft-sealed Wafer Butterfly Valve,Pneumatic Single Eccentric Wafer Butterfly Valve.
2026 Price Reference for Welded Butterfly Valve DN50
As of 2026, the price of a welded butterfly valve DN50 suitable for high-pressure steam pipelines generally ranges from RMB 1,200 to RMB 4,500, depending primarily on the valve body material, seal type, and actuation method .
For chrome-molybdenum steel (WC6/WC9) bodies, which are suitable for temperatures up to 540°C, prices typically fall in the RMB 1,200 to RMB 2,200 range . Stainless steel (304/316) bodies are priced at RMB 1,800 to RMB 2,800, while high-temperature alloy steel versions command the highest prices, ranging from RMB 3,200 to RMB 4,500 .
Some suppliers offer more economical options in the RMB 300 to RMB 900 range, particularly for cast steel or carbon steel models with simpler configurations . However, these may have lower temperature or pressure ratings and should be carefully evaluated against the specific steam service requirements.
Key Factors Influencing the Price
Valve Body Material
The choice of valve body material is the most significant cost driver. For high-pressure steam applications, the following materials are commonly specified :
- Chrome-molybdenum steel (WC6/WC9): The preferred choice for temperatures up to 540°C, offering excellent high-temperature strength and creep resistance.
- Stainless steel (304/316): Provides good corrosion resistance and is suitable for many steam applications, though with slightly lower temperature limits than chrome-molybdenum alloys.
- High-temperature alloy steel: Specified for the most demanding applications where both extreme temperature and corrosion resistance are required.
Seal Type
Hard seal (metal-to-metal) construction is essential for high-pressure steam conditions. The hardfacing material, typically Stellite or other cobalt-based hard alloys, is applied to the disc and seat to withstand steam erosion and high-temperature oxidation .
Core Requirements for High-Pressure Steam Pipelines
Welded butterfly valves designed for high-pressure steam service must meet several critical requirements to ensure safe and reliable operation .
Pressure rating certification is mandatory. The valve body must pass corresponding pressure rating certifications such as Class 600/900 or PN63/100 to ensure structural integrity under high-temperature and high-pressure conditions .
High-temperature materials are essential. The valve disc and seat must be hardfaced with high-temperature resistant hard alloys, such as Stellite, to withstand steam erosion and high-temperature oxidation .
Design and construction standards ensure product quality. Common design standards include API 609, ASME B16.34, and GB/T 12238. Butt weld ends should conform to ASME B16.25 or HG/T 12224 .
Confirm the hardness of the sealing surface and the hardfacing process. Verify that the Stellite or equivalent hardfacing is properly applied to ensure erosion resistance .
Prefer products with integrally forged or precision cast valve bodies for enhanced structural integrity .
Provide detailed operating conditions to the supplier, including steam temperature, working pressure, and opening/closing frequency parameters. This ensures the correct material and design are selected .
Compare multiple quotes from at least three professional high-temperature and high-pressure valve manufacturers. Confirm the welding procedure qualification report to ensure proper welding procedures will be followed during installation .
The welded butterfly valve DN50 is a robust solution for high-pressure steam pipelines, offering leak-free performance through welded connections and reliable sealing through hardfaced metal-to-metal seals. As of 2026, prices range from approximately RMB 1,200 to RMB 4,500, with the final cost determined by body material (chrome-molybdenum steel, stainless steel, or high-temperature alloy), seal type (single-layer or multi-layer hard seal), and actuation method (manual worm gear, pneumatic, or electric).
When selecting this valve for steam service, pay careful attention to the pressure rating certification (Class 600/900 or PN63/100), material compatibility with the operating temperature, hardfacing quality, and compliance with applicable standards such as ASME B16.34 or API 609 . For the most competitive and accurate pricing, contact manufacturers directly with your complete technical specifications and request material certificates, test reports, and welding procedure qualification documents to guarantee product quality and installation integrity.
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