Parker 6F-C6L-1-SS-GR 3/8" FNPT 316 Stainless Steel Check Valve 1 psi Cracking Pressure

3/8" FNPT 316 Stainless Check Valve

The Parker 6F-C6L-1-SS-GR is a 3/8 inch FNPT inline poppet check valve built from 316 stainless steel. It is intended for fluid-system designers and maintenance engineers who need reliable one-way flow control in instrumentation or process piping. The fluorocarbon seals and metal body suit corrosive or high-purity media. It meets the needs of specifiers requiring a compact, metal-seated non-return device.

Inline poppet with horizontal or vertical mounting

The valve installs directly into 3/8 inch FNPT threads without additional fittings, freeing panel space and reducing potential leak paths. Its poppet mechanism opens at 1 psi cracking pressure and seats against fluorocarbon in either horizontal or vertical orientation, simplifying routing in tight cabinets or skid frames. The 316 stainless construction resists the chemicals that attack brass or carbon steel, so the same valve can stay in place when the process fluid changes.

Replaces lower-rated or non-stainless check valves

The jump is worth it when the existing valve cannot handle 6000 psi at 100 °F or must survive temperatures from -30 °F to 275 °F. It also supersedes valves lacking California Proposition 65 disclosure where that compliance is mandated. Do not select this model for steam service, as it carries no steam-pressure rating.