OS&Y, Rising stem, Plug Disc
Pressure sealing Bonnet, Threaded or welded seating
ASTM A216 WCB, A217 WC6, A351CF8, A351CF8M,
A351 CF3, A351 CF3M, A351 CN7M

Standards compliance
Design and Manufacture: ANSI B16.34, BS1873
Face to face(end to end): ANSI B16.10
Flanged connection: ANSI B16.5
Butt welded end: ANSI B16.25
Test and inspection: API598.

A. Back up ring: Absorbs thrust applied by internal pressure
B. Thrust ring: Protects the soft metallic gasket from deformation
C. Gasket: Unique angular design provides superior sealing