Valve design according to AP160. Suitable for flange ANSI CLASS150(GB PN20). Face to face of ANSI CLASS125/150, CLASS300 according to AIP6D. Face to face of PN6, PN10, PN16, PN25 meets industry standard. Feture Compact demensions and low weights. Installing between flanges with packing or without packing. To be installed with vertical(only upwards flow) or horizontal flow. For soft seat no leakage, for metal seat according to AP1598. size range 1.5"-24"