OS&Y, Rising stem, Flexible Wedge
Bolted Bonnet, Threaded or welded seat ring
ASTM A216 WCB, A217 WC6, A351 CF8, A351 CF8M, A351 CF3, A351 CF3M, A351 CN7M

Standards compliance
Design and Manufacture: ANSIB16.34, API600 API6D, API603, BS1414
Face to face(end to end): ANSIB16.10, API6D
Flanged connection: 2"~24"to ANSIB16.5, 22", 26"~36"to MSS-SP-44 to API605 on request
Test and inspection: API598, API6D
Butt welded end: ANSIB16.5