Nibco NLH250H Wafer Butterfly Valve 4 Inch Lever Handle

Product Description

The NIBCO NLH250H is a manual wafer-style butterfly valve designed for 4-inch pipe installations in commercial and industrial fluid control systems. It features a ductile iron body and disc, a stainless steel stem, and a Buna-N seat rated for service up to 250 psi and 180 degrees F. The lever handle provides straightforward quarter-turn operation for open and close functions. This valve is lead-free and carries U.S. Coast Guard Category A listing, making it suitable for marine and general industrial plumbing applications. Licensed plumbers and pipefitters are the typical installers on both new construction and retrofit projects.

The NLH250H fits wafer-style installation between flanges on 4-inch pipe systems. Its compact wafer design keeps the valve centered between standard pipe flanges without the added footprint of lugged or flanged-end bodies. This configuration is common in HVAC chilled and hot water piping, industrial process lines, and marine fluid systems where space and weight savings matter. The lever handle is suited for applications where automated actuation is not required and manual shutoff or flow isolation is the primary function.

Key Features

• Ductile iron body and disc for durability under pressure in demanding service conditions
• Stainless steel stem (Grade 416) resists corrosion and wear through repeated cycling
• Buna-N seat rated for temperatures up to 180 degrees F
• Maximum working pressure of 250 psi
• Lead-free construction meets applicable potable and process water requirements
• U.S. Coast Guard Category A listed; meets MSS SP-67 and MSS SP-25 marking standards

Compatibility

Designed as an OEM-style wafer butterfly valve for 4-inch pipe flanged systems in HVAC, industrial process, and marine plumbing applications where wafer-end valves meeting MSS SP-67 are specified.

Installation Notes

Installation is typically performed by a licensed plumber or pipefitter. Shut off system pressure and drain the line before removing or installing the valve. The wafer body must be centered precisely between mating flanges using appropriate bolting hardware to ensure a leak-free seat seal. Consult applicable codes such as the IPC or ASME B31.1 for flange bolt torque sequences and inspection requirements.