The structural length and characteristics of American standard gate valves are important considerations in the design and selection of these valves for various fluid control systems. The structural length of a gate valve refers to the distance from the flange or thread end to the valve disk. The specific lengths can vary based on the pressure rating and connection type of the valve.
American standard gate valves are control components in fluid delivery systems and have functions such as cutoff, regulation, diversion, prevention of reverse flow, pressure stabilization, flow distribution, or overflow pressure relief. They are used to control the flow of various types of fluids, including air, water, steam, corrosive media, mud, oil, liquid metals, and radioactive media.
One of the key standards governing the design and specifications of American standard gate valves is API 602. This standard covers steel gate, globe, and check valves with nominal sizes up to and including DN100 (American standard sizes). It specifies requirements for design, materials, dimensions, nominal pressure, structural length, manufacturing, inspection, and testing.
A notable feature of API 602 is its compact structure. Compared to other standards like BS1873, gate valves designed according to API 602 have a shorter structural length for the same specifications. This compactness can be advantageous in terms of space savings and installation ease.
In terms of structural length, API 602 defines several categories:
Short structural length (SRL): This type is suitable for Class 150 valves and has a structural length of 7.5 inches when using an RF (raised face) connection.
Medium structural length (MRL): Applicable to Class 300 and Class 600 valves, this length measures 10.5 inches with an RF connection.
Long structural length (LRL): Suitable for Class 900 and Class 1500 valves, the structural length is 14 inches with an RF connection.
Additionally, the structural length of American standard gate valves can be customized to meet specific customer requirements. This flexibility ensures that the valves can be tailored to fit into various fluid control systems effectively.
Overall, the structural length and characteristics of American standard gate valves are designed to optimize performance, durability, and ease of installation in a wide range of fluid control applications.
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