gate valves for petroleum pipeline (with flexible wedge) Structure OS&Y, bolted Bonnet, rising stem, hand wheel operator gate valves for petroleum pipeline (with flexible wedge) 1) Structure OS&Y, bolted Bonnet, rising stem, hand wheel operator, flexible wedge. 2) Standards as per ANSI, API, BS, JIS.3) Trim 13Cr4) Class 150LB-800LB. (on processing)5) Size Range 2"-12" 6) End Connections Flanged, ...