,pilot-operated hydraulic control valve (resembling a pressure reducing valve or pressure relief valve), typically used in water supply systems to regulate pipeline pressure. [1, 2]
Key Visual Features
Body: Blue-painted flanged ductile or cast iron.
Control Assembly: A brass pilot valve mounted on top with a copper sensing/bypass tubing line.
Connections: Standard circular flanged ends for bolting into a pipeline. [1, 2, 3]
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Installation or troubleshooting steps
Parts identification or specifications
Application guidance (water systems, fire protection)