Design and Performance Standards of American Standard Cast Steel Globe Valves

Design and Performance Standards of American Standard Cast Steel Globe Valves

In industrial piping systems, American standard cast steel globe valves are widely recognized for their excellent durability and reliability. This valve is designed and manufactured strictly in accordance with the specifications established by the American National Standards Institute (ANSI) and the American Petroleum Institute (API). The following will provide a detailed analysis of the design characteristics of American standard cast steel globe valves and the performance standards they follow.

Design features

1. Material selection: American standard cast steel globe valves are usually cast using ASTM specified steel, such as ASTM A126 grade WCB (carbon steel castings), to ensure that the valve has good mechanical strength and corrosion resistance.
2. Sealing design: The valve seat and disc are designed with precisely matched conical or circular sealing surfaces to ensure effective prevention of medium leakage in the closed state and achieve a tight closing effect.
3. Valve stem anti blow out design: To prevent the valve stem from being blown out by the medium during high-pressure operation, the American standard cast steel globe valve is designed with an anti blow out device, which improves the safety of the valve.
4. Fire safety design: According to the API 607 fire safety standard, some American standard cast steel globe valves are designed with fire resistant structures, which can maintain a certain sealing ability even in the event of a fire, ensuring the safety of the system.
5. Valve stem seal: A replaceable valve stem seal component is used, which ensures low friction during opening and closing, and is also easy to maintain and replace.
6. Handwheel operation: For the convenience of manual operation, American standard cast steel globe valves are usually equipped with a handwheel, and the size and strength design of the handwheel meet the requirements of ANSI for easy use by the operator.

Performance standards

1. Pressure rating: American standard cast steel globe valves are classified according to relevant standards such as ANSI/ASME B16.34, such as Class 150 and Class 300, to ensure safe operation under different pressures.
2. Temperature range: According to the temperature range of ASTM materials, American standard cast steel globe valves are suitable for different working environments from low to high temperatures.
3. Leakage level: According to the leakage standard of FCI-70-2 (Factory Mutual Research), American standard cast steel globe valves provide different levels of sealing performance to meet different industrial application requirements.
4. Material corrosion resistance: The chemical composition and heat treatment process of the material comply with ASTM regulations, ensuring that the valve can still maintain good corrosion resistance in corrosive media.
5. Product Certification: American standard cast steel globe valves usually require a series of product certifications, including pressure testing, performance testing, and fire resistance testing, to verify that they meet the requirements of relevant standards.

In summary, American standard cast steel globe valves focus on practicality and safety in their design, and are manufactured strictly in accordance with American national standards and industry norms to ensure stable performance under extreme working conditions. Whether in the fields of petroleum, chemical, natural gas, or other industries, American standard cast steel globe valves have demonstrated their superior performance and high reliability. When selecting such valves, users should carefully examine the standards they meet and the actual working environment requirements to ensure the accuracy of selection and the safe and stable operation of the system.