American Standard Cast Steel Gate Valve DN100 Price for Class 150 and Class 300 Service
Understanding the price range for Class 150 and Class 300 ratings helps procurement teams budget accurately and evaluate supplier quotations effectively.The main gate valve product names of China gate valve Network include:Manual Vacuum Isolated Wedge Gate Valve,Manual Welding Vacuum Wedge Gate Valve,Manual Wedge Gate Valve With Purge Hole,Non-rising Stem Resilient Seat Seal Gate Valve,Non-rising Stem Wedge Cast Iron Gate Valve,Non-rising Stem Buried Wedge Gate Valve.
The DN100 size corresponds to a 4 inch nominal pipe diameter. In API 600 design, which governs most American standard cast steel gate valves, this size is available in both Class 150 and Class 300 pressure ratings . The primary difference between the two classes lies in wall thickness, flange dimensions, and pressure containment capability. A Class 300 valve features thicker walls and a heavier flange than its Class 150 counterpart, allowing it to handle higher working pressures at elevated temperatures.
For Chinese manufacturers, the price for a DN100 Class 150 cast steel gate valve typically ranges from approximately 900 to 1500 RMB per unit, depending on trim material, operator type, and certification requirements . The Class 300 version generally commands a premium of 20 to 30 percent due to the additional material and machining required. These prices reflect standard configurations with WCB body material, 13Cr or stellite trim, bolted bonnet construction, and handwheel operation.
Several factors influence the final price. Trim selection is significant: a valve with stellite-faced seat and wedge for high temperature or abrasive service costs more than one with standard 13Cr trim. Operator type also matters, with gear operators, electric actuators, or pneumatic actuators adding cost compared to the basic handwheel. Certification requirements such as API 598 testing, NACE compliance for sour service, or third party inspection will also affect pricing .
Key design features to verify in any quotation include outside screw and yoke rising stem design for visual position indication, flexible wedge for reliable seating across temperature changes, and renewable seat rings for extended service life . The valve should conform to API 600 for design and API 598 for testing, with face-to-face dimensions per ASME B16.10 and flanged connections per ASME B16.5 .
For procurement professionals, the evaluation should extend beyond unit price to include delivery time, warranty terms, and the manufacturer‘s track record in similar applications. A DN100 gate valve is a long-term asset, and the lowest initial cost rarely represents the lowest total cost of ownership in critical isolation service.
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