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Size: 1/2"~4" Pressure Rating: Class 1500~2500 BB,WB,PSB OS&Y,Outside Screw and Yoke Solid Wedge Renewable Seat Rings Thread /SW / BW/Flange   Design:API602/ASME B16.34/BS5352 Face to Face:ASME B 16.10/BS EN558 End Flange: ASMEB 16.5 End BW:ASMEB16.25 Pressure TemprASME 16.34 Test:API598 Special :NACE MR-01-75