Welded Butterfly Valve DN50 Price, High Pressure Steam Pipeline
Factors Affecting the Price of Welded Butterfly Valve DN50
Currently, the price of a welded butterfly valve DN50 suitable for high-pressure steam pipelines generally ranges from RMB 1,200 to RMB 4,500. The specific price is influenced by the following factors:
Valve Body Material: Chrome-molybdenum steel (WC6/WC9) costs approximately RMB 1,200-2,200, suitable for temperatures up to 540°C; stainless steel (304/316) costs RMB 1,800-2,800; high-temperature alloy steel costs RMB 3,200-4,500.The main Butterfly Valve product names of China Butterfly Valve Network include:Butt Welded Hard-sealed Butterfly Valve,Electric Metal Hard-sealed Wafer Butterfly Valve,High Temperature Butterfly Valve,Pneumatic High Vacuum Butterfly Valve,Three Eccentric Multi-level Metal Hard-sealed Wafer Butterfly Valve,Welding Sanitary Butterfly Valve,Fire Signal Butterfly Valve,Worm Gear Metal Hard-sealed Wafer Butterfly Valve.
Seal Type: Hard seal (metal-to-metal) is essential for high-pressure steam conditions. Multi-layer metal hard seal is approximately 30%-50% higher in price than single-layer hard seal.
Welding Connection Method: Butt weld (BW) offers high structural strength and no leakage points, with a slightly higher price than socket weld (SW), though the overall difference is small.
Actuation Method: Manual worm gear is the basic configuration (RMB 1,200-2,000); pneumatic or electric actuator configurations can increase the total price by 60%-100%.
Core Requirements for High Pressure Steam Pipelines
The welded connection completely eliminates the potential gasket leakage risk associated with flanged connections. The valve disc and seat are hardfaced with high-temperature resistant hard alloy (such as STL) to withstand steam erosion and high-temperature oxidation. At the same time, the valve body must pass corresponding pressure rating certifications (Class 600/900 or PN63/100) to ensure structural integrity under high temperature and high pressure.
Purchasing Suggestions
It is recommended that users request material certificates and pressure test reports from suppliers (shell test pressure is 1.5 times the nominal pressure). Confirm the hardness of the sealing surface and the hardfacing process, and give preference to products with integrally forged or precision cast valve bodies. Provide steam temperature, working pressure, and opening/closing frequency parameters, request quotes from at least three professional high-temperature and high-pressure valve manufacturers for comparison, and confirm the welding procedure qualification report.
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