Norgren 4LD-052-D00 Inline Barb Check Valve

Product Description

The NORGREN 4LD-052-D00 is an inline check valve with barb connections, designed to allow one-directional fluid or gas flow while preventing backflow in pneumatic and fluid-handling systems. The valve body is constructed from polypropylene, offering resistance to a wide range of chemicals and moisture. It opens at a crack pressure of 3.00 psi, making it suitable for low-pressure applications. The barb connection style is compatible with flexible tubing and allows for tool-free installation in many configurations. Licensed plumbers, HVAC technicians, and industrial service professionals are the typical installers of this component.

This check valve is intended for use in inline pneumatic lines, fluid transfer systems, and light-duty plumbing circuits where backflow prevention is required at low operating pressures. The barb fitting style suits flexible tubing with a 1/16-inch inside diameter. It is commonly installed in residential and light commercial systems where polypropylene body materials are appropriate for the media being handled. The compact form factor fits into tight inline runs without requiring fittings or threaded connections.

Key Features

• Inline check valve design prevents backflow in low-pressure pneumatic and fluid systems
• Crack pressure of 3.00 psi allows flow at minimal system pressure
• Polypropylene body construction provides chemical and corrosion resistance
• Barb connection style compatible with flexible tubing for straightforward installation
• Designed for tubing with 1/16-inch inside diameter
• Lightweight at 0.5 pounds, suitable for space-constrained installations

Compatibility

Designed as an OEM-style inline replacement check valve for low-pressure pneumatic and fluid-handling systems using barb-connected flexible tubing with a 1/16-inch inside diameter.

Installation Notes

Installation should be performed by a qualified HVAC technician, plumber, or industrial service professional familiar with the system media and pressure requirements. Shut off and depressurize the system fully before removing the existing check valve or installing a new one. Ensure the valve is oriented in the correct flow direction as indicated by any arrow or marking on the body. Barb connections should be secured with appropriate clamps or ties to prevent tubing pullout under system pressure.