This is a 4 inch cast iron gate valve manufactured by Legend Valve. These IBBM gate valves are made of ASTM A-126, Class B cast iron with bronze trim.
They are an outside screw and yoke design with a bolted bonnet and ANSI Class 125 flanged ends. They have a solid wedge with replaceable seat rings and meet MSS-SP70 specifications.
These are designed for use in commercial swimming pool and industrial applications.
In a pool plumbing system, gate valves serve various critical functions. For instance, they are typically installed to isolate particular sections of the system for repairs or maintenance without the need to shut down the entire circulation. Furthermore, gate valves are often utilized for regulating the flow of water in conjunction with other components such as pool heaters, chemical feeders, and cleaning systems. This helps maintain the optimal balance of water temperature, chemical concentration, and cleanliness in the pool.
There are certain factors, however, that pool owners and operators must consider when employing gate valves in a pool system. For example, gate valves are not recommended for applications that require frequent operation.
