Parker 6F-C6L-1-SS Inline Check Valve 3/8 in Fnpt Ss

Product Description

The PARKER 6F-C6L-1-SS is a stainless steel inline check valve designed for high-pressure fluid and gas control applications. It features female NPT (FNPT) connections on both ends and is built for systems where backflow prevention is critical. With a maximum working pressure of 6000 psi and a low crack pressure of 1.00 psi, this valve opens easily under minimal forward pressure while sealing reliably against reverse flow. Both the body and spring are constructed from stainless steel, making this valve well suited for corrosive media, high-cycle service, and applications where carbon steel components are not acceptable. Licensed pipefitters, HVAC technicians, and industrial maintenance professionals typically specify this type of fitting.

This check valve is sized for 3/8 inch pipe with FNPT x FNPT end connections, making it compatible with standard threaded pipe assemblies in hydraulic, pneumatic, refrigeration, chemical processing, and high-pressure instrumentation lines. Its inline configuration allows installation directly into existing threaded pipe runs without adapters. The all-stainless construction supports use in both indoor and outdoor environments, including systems exposed to moisture, mild acids, or other corrosive conditions where brass or carbon steel fittings would degrade over time.

Key Features

• Maximum working pressure of 6000 psi for high-pressure system compatibility
• Low crack pressure of 1.00 psi enables reliable opening under minimal forward flow
• Stainless steel body and spring resist corrosion and withstand aggressive media
• FNPT x FNPT connections on both ends for straightforward threaded installation
• 3/8 inch pipe size fits standard threaded pipe assemblies across multiple trade applications

Compatibility

Designed as an OEM-style replacement or direct-fit component for inline check valve applications using 3/8 inch FNPT threaded pipe connections in high-pressure fluid and gas systems.

Installation Notes

Installation should be performed by a licensed pipefitter or qualified technician in accordance with applicable codes such as the IPC or IFGC. Depressurize and isolate the line completely before removing any existing fitting or installing this valve. Apply thread sealant rated for the system media and pressure range to the male NPT threads of the mating pipe or fitting. Verify flow direction arrow or valve orientation before final makeup to ensure proper backflow prevention.