Kennedy Grooved Swing Check Valve – 4-Inch and 6-Inch
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The Kennedy Valve Figure 726 Grooved Swing Check Valve is engineered for positive unidirectional flow control in commercial and industrial fire protection piping networks. Designed to install seamlessly into wet or dry fire sprinkler systems, suppression assemblies, and water supply lines using approved IPS grooved couplings, this lightweight valve prevents reverse water flow that could compromise system pressure. It operates reliably in either horizontal configurations or vertical upward-flow orientations.
This check valve complies directly with stringent life safety criteria mandated by NFPA 13 (Standard for the Installation of Sprinkler Systems) and NFPA 25 (Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems). Its reliable swing-disc mechanism meets code requirements for backflow prevention and hydraulic isolation, ensuring instantaneous closure upon flow reversal during an active fire event or periodic system testing.
Key Features & Construction
- Ductile Iron Body: High-strength, lightweight ductile iron construction ensures long-term structural durability while simplifying handling and overhead alignment on the job site.
- IPS Grooved Ends: Standard grooved connections allow rapid, rigid attachment using approved mechanical grooved couplings, reducing installation labor and downtime.
- Flexible Mounting Orientations: Certified for installation in both horizontal runs and vertical pipelines with upward flow.
- Optional Inlet Tapping: Available upon request with a 1/2-inch NPT connection on the inlet side to accommodate a 1/2-inch ball drip valve.
Technical Specifications & Compliance Table
| Manufacturer / Brand | Kennedy Valve |
| Model / Series Number / SIN | Figure 726 (SKU 726-0400 / 726-0600) |
| Connection / Thread Size & Type | IPS Grooved End (4" and 6" nominal sizes available; optional 1/2" NPT inlet tapping) |
| Pressure Rating (WWP / Max Working Pressure) | 300 PSI (2.07 MPa) |
| K-Factor | N/A |
| Temperature Rating / Response Type | N/A |
| Material / Body Construction | Ductile Iron |
| Agency Listings & Approvals | UL Listed, FM Approved |
| Applicable NFPA Standards | NFPA 13, NFPA 25 |
Contractors must verify specific Authority Having Jurisdiction (AHJ) requirements, seismic bracing parameters, and local fire code amendments prior to system integration. Always consult the official manufacturer submittal data sheets for exact face-to-face dimensions and torque specifications.
Documentation: Download Manufacturer Technical Data & Cut Sheet (PDF)
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