Nibco 39923778000 Lug Butterfly Valve 20 Inch Gear

Product Description

The NIBCO 39923778000 is a 20-inch lug-style butterfly valve in the LD-1000-5 series, designed for reliable shut-off service in HVAC systems and hot and cold potable water applications. The valve features a ductile iron body rated at 125/150 lb pressure class, an aluminum bronze disc, and a stainless steel stem with stainless steel taper pin for corrosion resistance and long service life. An EPDM seat provides a tight seal against water media. A gear actuator is included for controlled, low-effort operation on this large-diameter valve. This is a domestically produced valve suitable for commercial and industrial piping systems where dependable isolation is required.

The LD-1000-5 series lug butterfly valve is suited for 20-inch piping in HVAC heating and cooling distribution systems, as well as hot and cold potable water supply lines. The lug-style body allows the valve to be installed as a dead-end shutoff, enabling one side of the line to be removed without disturbing the opposite flange connection. Licensed plumbers, pipefitters, and mechanical contractors typically handle installation in commercial and industrial settings.

Key Features

• Lug-style body allows dead-end service without full line shutdown
• Ductile iron body rated at 125/150 lb pressure class for robust service
• Aluminum bronze disc for corrosion resistance in water service
• Stainless steel stem and stainless steel taper pin for durability and reliability
• EPDM seat compatible with water media including potable applications
• Gear actuator provides controlled operation on large 20-inch diameter

Compatibility

Designed for use in HVAC systems and hot and cold potable water piping. The lug-style configuration is compatible with ANSI 125/150 lb flanged piping systems in a 20-inch nominal pipe size.

Installation Notes

Installation of a 20-inch lug butterfly valve should be performed by a licensed pipefitter, plumber, or mechanical contractor in accordance with applicable codes such as the IPC and IFGC. Isolate and depressurize the line completely before removing or installing the valve. Confirm flange bolt pattern and gasket compatibility with the mating flanges prior to installation. Verify gear actuator travel stops are set correctly after installation and before returning the system to service.