2-1/2" FNPT Bronze Swing Y Check Valve MPN:509Y 2 1/2"
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In Stock
SKU
510-G4098157
2-1/2" FNPT Bronze Swing Y Check Valve
MILWAUKEE VALVE 509Y is a 2-1/2 in. bronze swing Y check valve with FNPT x FNPT connections. It uses a swing check mechanism in a Y-style body for one-way flow applications and backflow reduction in general-purpose piping systems handling gas, oil, steam, and water. The valve features a full-flow design, a 0.5 psi cracking pressure, and can be mounted horizontally or vertically.
Key Features:
- 2-1/2 in. nominal valve size with 2-1/2 in. female NPT connections on both ends
- Bronze body with bronze check mechanism, seat, and seal materials
- Y-pattern swing check design with single-flow configuration
- Flow rating: 192 gpm
- Cv rating: 150
- Maximum water pressure: 200 psi at 150 degrees F
- Maximum steam pressure: 125 psi WSP
- Operating temperature range: -20 degrees F to 425 degrees F
- Mounting orientation: horizontal or vertical
- Overall dimensions: 6 in. L x 6-1/4 in. H x 3-1/4 in. W
- Standards: ASTM B16, ASTM B505, ASTM B584, MSS SP-80
Additional Information
- Country of Origin: US
- Drop Ship Item: No
- Blind Ship Eligible: No
- LTL Freight Required: No
- Lead Time: Ships in 1 days
- Minimum Order Quantity: 1
- Unit of Measure: EA
- Package Length: 7.10
- Package Width: 6.80
- Package Height: 4.20
- Package Weight: 10.65
Product info last updated on February 7, 2026 12:11am UTC
Category: Pipes, Valves and Fittings