How is the pressure rating of American standard gate valves classified?

2023-04-17 17:48:48

The pressure rating of American standard gate valves is divided according to the relevant standards of the American National Standards Institute (ANSI)/American Society of Mechanical Engineers (ASME), mainly including the following common pressure ratings:

Class 150: This is a common pressure rating in American standard Gate valves, usually suitable for some low-pressure, room temperature working conditions, such as general water, air and other medium conveying systems. Its nominal pressure is about 2.0MPa.

Class 300: Suitable for situations with relatively high pressure and temperature, such as mild corrosive media or medium pressure steam systems. The nominal pressure is about 5.0 MPa.

Class 600: capable of withstanding higher pressure and temperature, commonly used in pipeline systems with high pressure resistance requirements for valves in industries such as petroleum and chemical engineering, such as high-pressure oil pipelines or high-temperature chemical medium pipelines. The nominal pressure is about 11.0MPa.

Class 900: It belongs to a higher pressure class and is generally used in high-pressure, high-temperature, and complex medium conditions, such as some large refineries, natural gas pipelines, etc. The nominal pressure is about 15.0 MPa.

Class 1500: Suitable for ultra-high pressure systems, it has high requirements for valve materials, manufacturing processes, and sealing performance. It is commonly used in some special industrial fields, such as high-pressure hydrogenation units. The nominal pressure is about 26.0MPa.

Class 2500: This is a higher pressure rating among American standard gate valves, generally used in extreme high-pressure conditions, such as valve systems in certain deep-sea oil extraction equipment. The nominal pressure is about 42.0MPa.

In practical applications, American standard gate valves with appropriate pressure ratings should be selected based on specific engineering requirements, medium characteristics, working temperature, and pressure factors to ensure the safe and reliable operation of the valves.