Nibco nlk680e Ductile Iron Grooved Butterfly Valve 2.5 Inches 300 Psi Lever-lock Handle Quarter-turn

Product Description

The NIBCO NLK680E is a ductile iron grooved butterfly valve designed for commercial and industrial piping systems where reliable flow control is essential. Built for a 2.5-inch grooved connection, this valve is rated at 300 PSI and operates with a simple quarter-turn, 90-degree motion from fully open to fully closed. HVAC technicians, mechanical contractors, and plumbers rely on this type of valve for chilled water, hot water, and general service water systems where fast shutoff and easy operation are required. The lever-lock handle allows the operator to set the valve position and lock it in place, preventing accidental movement during system operation. The disc is constructed from ductile iron with an EPDM coating, which provides corrosion resistance and a reliable seal across a wide range of water-based applications. The seat material is Polymid, chosen for its durability and compatibility with the valve body and disc assembly. One of the standout design features of this valve is the internal splined stem-to-disc drive connection. This eliminates the need for external pins or bolts that can create potential leak paths or introduce turbulence into the waterway. The result is a cleaner flow path and a more secure mechanical connection between the stem and disc. The extended neck design on the NLK680E accommodates pipe insulation up to 2 inches thick, making it well-suited for insulated chilled water and cold water piping systems where condensation control is a priority. Grooved end connections make installation fast and straightforward, compatible with standard grooved pipe couplings commonly used in mechanical systems. This valve ships at approximately 7.425 pounds. Refer to NIBCO technical data sheets and chemical resistance guides for full engineering and installation specifications.

• Quarter-turn lever-lock handle for fast, secure open and close operation
• EPDM-coated ductile iron disc with splined stem drive eliminates pins and bolts that could cause leaks
• Extended neck accommodates up to 2 inches of pipe insulation for cold and chilled water systems

Product Highlights

The NIBCO NLK680E delivers dependable quarter-turn shutoff in a grooved ductile iron butterfly valve sized at 2.5 inches and rated to 300 PSI. Its splined stem-disc design and lever-lock handle make it a practical choice for HVAC and plumbing contractors working on commercial water systems.

Product Information

Standard Information

• Brand: NIBCO
• Manufacturer Part Number: NLK680E

Technical Specifications

• Valve Type: Butterfly Valve
• Connection Type: Grooved
• Valve Size: 2.5 inches
• Pressure Rating: 300 PSI
• Body Material: Ductile Iron
• Disc Material: EPDM Coated Ductile Iron
• Seat Material: Polymid
• Valve Operator: Lever-Lock Handle
• Operation: Quarter-Turn
• Insulation Clearance: Up to 2 inches
• Weight: 7.425 pounds
• UPC: 039923767233