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GB/T 28778-2023 English PDF (GBT28778-2023)

GB/T 28778-2023 English PDF (GBT28778-2023)

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GB/T 28778-2023: Pilot operated safety valves
This document specifies the design, material and structural requirements, ex-factory tests, type tests, determination of discharge, calculation of rated displacement and flow area, as well as marking and sealing of pilot operated safety valves. This document applies to pilot operated safety valves with set pressure not less than 0.1 MPa and flow channel diameter not less than 4 mm.

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