Model 816 and 816FL Ward check valves and Model 16 and 16FL Ward strainers are available in ¼–2 in. threaded and 1–2 in. ANSI 150 Class Flanged configurations. Construction can be of ASTM 316 stainless steel or other materials, such as WCB Steel, Alloy 20, Monel, or Hastelloy C. Valve features Sealing System with sealing plunger that features angled elastomer disk totally encapsulated in Teflon®. Design produces positive shut-off at both low and high back pressure rated 150 WSP up to 450°F.