Standards Compliance: API 600, API 602, API 6D, GB12234, ASME B16.34, MSS SP-117 Construction: Bolted Bonnet, OS&Y
.Double Bellow & Sealing, Convenient Maintanence, Position Indicator Flanged Dimension: ANSI/ASME B16.5, JB79, S.W Ends: ANSI B16.11, Screwed Ens: ASME B1.20.1
.Face to Face Dimension: ANSI/ASME B16.10, GB/T12221
.Inspect & Test: API 598, GB