Norgren 4LD-064-D00 Inline Barb Check Valve 5/32 Inch

Product Description

The NORGREN 4LD-064-D00 is an inline check valve with barb-style connections, designed to allow one-directional fluid or air flow while preventing backflow in pneumatic and fluid handling systems. The body is constructed from polypropylene, offering resistance to a wide range of chemicals and moisture. This valve has a crack pressure of 3.00 psi and is rated for a minimum operating pressure of 0 psi, making it suitable for low-pressure applications. At 0.5 pounds, it is a compact, lightweight component installed by HVAC technicians, plumbers, and fluid system specialists in both equipment assembly and field service work.

This check valve is suited for inline installation in tubing systems where backflow prevention is required. The barb connection style is compatible with tubing that has a 5/32 inch inside diameter, with an outside diameter measuring approximately 16.30 millimeters. Typical applications include pneumatic control lines, condensate drainage systems, fluid transfer assemblies, and similar low-to-moderate pressure circuits found in residential and light commercial equipment. It is packaged and sold as a single unit.

Key Features

• Inline check valve design prevents reverse flow without manual actuation
• Barb connection type provides a secure friction fit on compatible tubing
• Polypropylene body offers corrosion resistance and chemical compatibility
• Low crack pressure of 3.00 psi allows actuation under minimal differential pressure
• Rated for a minimum operating pressure of 0 psi, suitable for gravity-assist or near-atmospheric circuits
• Lightweight at 0.5 pounds for easy handling and installation in tight spaces

Compatibility

Designed for use with tubing having a 5/32 inch inside diameter and a barb-style connection. Suitable as an inline check valve in low-pressure pneumatic or fluid handling assemblies where backflow prevention is required.

Installation Notes

Installation is typically performed by HVAC technicians, plumbers, or pneumatic system technicians. Before servicing, shut off all pressure supply to the line and verify pressure has fully relieved before disconnecting tubing. Ensure tubing inside diameter matches the barb fitting dimension to maintain a proper seal and prevent leakage. Follow all applicable plumbing and mechanical codes for the jurisdiction and system type in which this valve is installed.