... DescriptionInverted Pressure Balance Plug Valve Product Description Size: NPS 1/2" - 4" Pressure: Class 150 - 300 Material: WCB, LCB, CF8, CF3, CF3M, and ... CF8M Design & Manufacture Std.: API 6D, API 599, and ASME B16 ... B1. 20. 1, ASME B16. 5, and ASMEB16. 250 Test Standard: ISO5208, and API 6D Structure Type: Short pattern, regular ...