The CTD1212 In-Tank Check Valve by Conrader is a brass, in-tank valve designed to sit between an air compressor discharge and the receiver or main header to prevent backflow when the compressor unloads. It features a 1/2 in compression inlet and a 1/2 in MNPT outlet, with a 1/8 in NPT bleeder port on the hex, and is rated to 500 psi. With a rated flow of about 20 SCFM at 100 psi, the valve offers a compact solution for typical small-to-midsize air systems, with dimensions roughly 6 × 6 × 6 in and a weight of about 1 lb. This configuration is commonly used to maintain system pressure and protect the compressor by stopping reverse flow from the receiver into the discharge line.
