Nishaka air system components wafer style butterfly valve is crafted to maintain a seal against bi, Directional pressure differential to inhibit reverse flow in systems designed for unidirectional flow. This item is frequently utilized for air-driven automation solutions equipments. Product details wafer design centric disc butterfly-configured valve that includes actuator operated. Mfg. Std. Bs, 5155/ api, 609 ends wafer design manufacturing range sizes 1 nb 32mm to 6 nb 150mm up to 8 on request inspection & testing bs 6755/ api, 598 m. O . C. Ss, 316 ASTM A351 specification grade cf8m, Ss, 304 astm a, 351 gr cf8 c. S Other specifications include ASTM A216 Grade WCB material on request.