Cast Steel Three Eccentric Butterfly Valve DN200 Price, High Temperature High Pressure Service
Factors Affecting the Price of Cast Steel Three Eccentric Butterfly Valve DN200
Currently, the price of a cast steel three eccentric butterfly valve DN200 generally ranges from RMB 2,800 to RMB 8,500. The specific price is influenced by the following factors:
Valve Body Material: Cast steel (WCB) costs approximately RMB 2,800-4,500, suitable for temperatures up to 425°C; chrome-molybdenum steel (WC6/WC9) costs RMB 4,500-6,500, suitable for temperatures up to 540°C; stainless steel (CF8/CF8M) costs RMB 5,000-8,500.
Seal Type: Multi-layer metal hard seal (STL hardfacing) costs RMB 2,800-5,500; all-metal hard seal (no interlayer) offers higher temperature resistance and is 30%-50% higher in price.
Three Eccentric Structure: Standard eccentric design costs RMB 2,800-5,000; high-precision lapped and matched sealing surfaces increase the price by 20%-40%.The main Butterfly Valve product names of China Butterfly Valve Network include:Three Eccentric Multi-level Metal Hard-sealed Wafer Butterfly Valve,High Temperature Butterfly Valve,Electric Desulfurization Flange Butterfly Valve,Flange Ceramic Hard-sealed Butterfly Valve,Pneumatic High Vacuum Butterfly Valve,Fire Signal Butterfly Valve,Quick-installed Sanitary Butterfly Valve,Worm Gear Metal Hard-sealed Wafer Butterfly Valve.
Actuation Method: Manual worm gear is the basic configuration (RMB 2,800-4,500); pneumatic or electric actuator configurations can increase the total price by 60%-100%.
Core Advantages for High Temperature High Pressure Dedicated Service
The three eccentric structure completely solves the sealing friction problem of traditional butterfly valves:
First Eccentric: The valve stem axis deviates from the centerline of the sealing surface, reducing opening and closing friction.
Second Eccentric: The valve stem axis deviates from the pipeline centerline, achieving a cam effect.
Third Eccentric: The axis of the sealing cone deviates from the valve centerline, generating a wedging force at the moment of closing, and instantly disengaging at the moment of opening, achieving frictionless opening and closing, greatly extending service life under high temperature conditions.
Purchasing Suggestions
It is recommended that users provide medium temperature, working pressure (Class 150-600 or PN16-PN100), and opening/closing frequency. When purchasing, confirm that the valve complies with API 609 or GB/T 12238 standards, and request high-temperature impact test reports and sealing surface hardness test reports from the supplier. Give preference to products with integrally cast valve bodies combined with STL hardfaced sealing surfaces, and request quotes from at least three professional high temperature high pressure butterfly valve manufacturers for comparison.
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