The PPCV series brass poppet check valve has inlet sizes of 1/8, 1/4 inch, 3/8 inch, 1/2 inch, and 3/4 inch female NPT threads and 3/8 inch and 1/2 inch male NPT threads. Outlet sizes are 1/4 inch, 3/8 inch, 1/2 inch, and 3/4 inch, 1 Inch female NPT threads. End body options are 1/4 inch and 3/8 inch male flare, and 1/4 inch female flare. Seal options are Buna-N, EPDM and Viton®. The cracking pressure on the 302 Stainless Steel spring is 1 psi (standard). Maximum operating pressure is 500 PSI for the 1/8 size and 1200 PSI for all the other sizes. The maximum operating temperature is 180 ºF. Two sizes of valves, the 3/8 FNPT and the 1-inch FNPT are available in 303 stainless.