Legris 4895 22 22 Check Valve 1/2 Inch Npt 580 Psi

Product Description

The LEGRIS 4895 22 22 is a unidirectional check valve designed for inline flow control in piping systems where backflow prevention is required. Constructed with a 316 stainless steel body and stainless steel spring, this valve handles a maximum working pressure of 580 psi and a crack pressure of 0.25 psi. The Viton seal provides reliable performance across a broad temperature range of -20 degrees F to 356 degrees F. The FNPT x FNPT end connections accept 1/2 inch NPT pipe on both ends. Plumbers and pipefitters install this valve in fluid and gas distribution lines where one-way flow integrity is critical.

This check valve suits residential and commercial plumbing, instrumentation, and industrial fluid handling applications. The 1/2 inch NPT connection size fits standard pipe assemblies in water, chemical, and process systems. Its stainless steel construction and Viton sealing make it well suited for corrosive media and elevated-temperature service. The compact inline design allows installation in tight runs where space is limited. Compliance with RoHS, PED, and REACH standards makes this valve appropriate for regulated installations in North America and Europe.

Key Features

• 316 stainless steel body and spring for corrosion resistance in demanding media
• Viton seal rated for broad chemical compatibility and high-temperature service
• Maximum working pressure of 580 psi suitable for high-pressure piping systems
• Low crack pressure of 0.25 psi allows flow initiation with minimal upstream pressure
• FNPT x FNPT end connections for straightforward threaded pipe assembly
• Compliant with RoHS, PED (97/23/EC), and REACH (1907/2006) regulations

Compatibility

Designed as an OEM-style inline check valve for 1/2 inch NPT threaded pipe systems in plumbing, process, and instrumentation applications.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable IPC and local plumbing codes. Shut off and depressurize the line completely before removing any existing valve or fitting. Apply thread sealant or PTFE tape to all NPT threads before assembly and torque fittings by hand first to avoid cross-threading. Verify that flow direction through the valve matches the intended system flow path before returning the line to service.