Parker 6M-C6L-1-SS Inline Check Valve 3/8 in Mnpt Ss

Product Description

The PARKER 6M-C6L-1-SS is a stainless steel inline check valve designed to allow one-directional flow and prevent backflow in high-pressure fluid systems. Built with a stainless steel body and stainless steel spring, it handles maximum working pressures up to 6000 psi with a crack pressure of 1.00 psi. The valve connects via male NPT fittings on both ends at a 3/8 inch pipe size, making it straightforward to integrate into existing threaded line assemblies. It is well suited for industrial, hydraulic, and process piping applications where corrosion resistance and pressure integrity are critical requirements. Licensed plumbers, pipefitters, and industrial maintenance technicians are the primary installers of this component.

This check valve is intended for inline installation in systems requiring reliable backflow prevention under high-pressure conditions. Its stainless steel construction makes it appropriate for corrosive media, washdown environments, and applications where carbon steel components would degrade. The MNPT x MNPT end connections fit standard 3/8 inch threaded pipe runs common in hydraulic circuits, pneumatic lines, chemical processing, and HVAC refrigerant or water-side piping. The compact, single-piece body design minimizes installation space requirements while maintaining full-rated working pressure.

Key Features

• Maximum working pressure of 6000 psi for demanding high-pressure applications
• Low crack pressure of 1.00 psi allows flow with minimal system pressure drop
• Stainless steel body and spring provide corrosion resistance in aggressive environments
• MNPT x MNPT connections on both ends for straightforward threaded pipe installation
• 3/8 inch pipe size fits standard trade piping configurations
• Compact inline design suited for space-constrained plumbing and hydraulic assemblies

Compatibility

Designed as an OEM-style inline check valve replacement for 3/8 inch MNPT threaded pipe systems rated to high-pressure service. Verify system pressure ratings and media compatibility with stainless steel before installation.

Installation Notes

Installation should be performed by a licensed plumber, pipefitter, or qualified technician in accordance with applicable codes including the IPC and ASME B31 piping standards. Depressurize and isolate the system fully before removing any existing valve or fitting. Apply appropriate thread sealant to the MNPT connections and avoid over-tightening, which can crack fittings or distort sealing surfaces. Confirm the flow direction arrow or valve orientation matches system flow before pressurizing the line.