Check-All SV804 Flange Insert Check Valve 1 Inch

The Check-All SV804 Flange Insert Check Valve, 1 inch, is a stainless steel insert-style check valve that sits between mating ANSI flanges in a piping system, centered by an upstream spring housing and sealed with two gaskets during installation. Designed for chlorine service, it features a 316 stainless steel housing and a 316 SS spring, with AFLAS seal options available for chemical compatibility and a cracking pressure of 3.50 psi in the standard configuration. In practice, this flange insert valve is built to fit between ANSI Class 150/300 flanges (F1) or between Class 150/300/600 flanges on schedule 80 piping (F6), and it can also function as a low-pressure relief valve or vacuum breaker by selecting the appropriate spring setting.