Nibco NLH250K Wafer Butterfly Valve 6 Inch 250 Psi

Product Description

The NIBCO NLH250K is a manual wafer-style butterfly valve rated for 250 psi working pressure and designed for 6-inch pipe. The body and disc are both ductile iron, with a stainless steel stem and a Buna-N seat for reliable shutoff and flow isolation. The lever handle allows direct manual operation without a gear actuator, making it well suited for accessible installations where quick open-close control is needed. This valve meets MSS SP-67 and carries U.S. Coast Guard Category A approval, along with MSS SP-25 marking standards. Licensed plumbers and pipefitters are the primary installers, typically in commercial HVAC, industrial fluid systems, and marine applications.

The NLH250K is built for 6-inch wafer-style installation between standard ANSI flanges in piping systems carrying water or compatible fluids at up to 250 psi and up to 180 degrees F. The lever handle configuration suits locations where the valve is easily reachable and operated by hand. Typical install scenarios include chilled water loops, condenser water lines, fire protection branch lines, and general service piping in commercial buildings and marine vessels.

Key Features

• 250 psi maximum working pressure for demanding fluid service applications
• Ductile iron body and disc provide strength and corrosion resistance in commercial piping
• Stainless steel stem (Grade 416) resists corrosion and wear over repeated cycles
• Buna-N seat material compatible with water and a wide range of general-service fluids
• Lever handle enables direct manual operation without a separate actuator or gear operator
• Lead-free construction suitable for potable and regulated fluid systems
• Meets MSS SP-67, MSS SP-25 marking standards, and U.S. Coast Guard Category A

Compatibility

Designed as an OEM-style wafer butterfly valve for installation between standard ANSI flanges on 6-inch pipe in commercial HVAC, industrial, and marine fluid piping systems.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable IPC and local mechanical codes. Depressurize and isolate the line completely before removing any existing valve or installing this unit. Wafer valves require proper flange alignment and appropriate hardware to prevent leakage at the seat. Confirm fluid and temperature compatibility with the Buna-N seat before placing the valve in service.