Nibco NHA3LJF Gate Valve 3 Inch Flanged Cast Iron 125

Product Description

The NIBCO NHA3LJF is a 3-inch flanged gate valve featuring an outside screw and yoke (OS and Y) design with iron trim. Built with a cast iron body and a bolted bonnet, this valve is engineered for reliable full-bore shutoff in commercial and industrial piping systems. The solid wedge disc provides positive sealing across the full flow path. Rated at pressure class 125, it is a standard choice for steam, water, and other compatible fluid services where a robust, field-serviceable gate valve is required. A wheel handle allows for manual operation without additional tooling.

This valve is suited for commercial mechanical rooms, industrial process piping, and building utility systems where flanged connections and OS and Y visibility requirements apply. The OS and Y stem design makes it easy to confirm open or closed position at a glance, which is a common requirement for fire protection and insurance compliance in commercial installations. Licensed plumbers, pipefitters, and mechanical contractors typically specify this valve in larger-diameter system applications.

Key Features

• OS and Y stem design allows visible indication of valve position (open or closed)
• Solid wedge disc delivers positive, full-bore shutoff with minimal flow restriction
• Bolted bonnet construction simplifies field inspection and repacking
• Cast iron body rated at pressure class 125 for broad compatibility with commercial piping systems
• Flanged end connection for secure, removable installation in 3-inch pipe systems
• Wheel handle allows manual operation without specialized tools

Compatibility

Designed as an OEM-style replacement or new-installation gate valve for 3-inch flanged piping systems operating within pressure class 125 ratings, typical in commercial HVAC, plumbing, and industrial fluid service applications.

Installation Notes

Installation should be performed by a licensed pipefitter or plumber in accordance with applicable mechanical and plumbing codes, including ASME and local jurisdictional requirements. Depressurize and drain the piping system fully before removing or installing any flanged valve. Verify flange bolt pattern and gasket compatibility before installation. The OS and Y configuration requires clearance above the valve for full stem travel when the valve is opened.