... to class 600#, PN16-PN100, they have reliable seat seal, Fire safe design, Anti blow-out stem, Anti static, locking device. RF ... , RTJ or BW endds. Full Bore or Reduced bore.Design and manufacture: API 6D, ASME B16.34, API 608, BS5351End ... : ASME B16.5Test and Inspection: API 6D, API 598Fire Safe Design: API 607/6FA Cast steel ball valve