MILWAUKEE VALVE 509Y 1/2" Swing Y Check Valve, 509Y Series, 1/2 in, FNPT x

The MILWAUKEE VALVE 509Y is a 1/2 in. swing Y check valve with a bronze body and FNPT x FNPT threaded connections. It uses a swing check mechanism in a Y-style body for one-way flow/check-valve applications in general-purpose piping systems handling gas, oil, steam, and water. The valve is rated for horizontal or vertical mounting, with a 0.5 psi cracking pressure, and has a flow rating of 10 gpm with a Cv of 7.2.

Key Features:

• Valve type: Swing Y check valve
• Body and trim: Cast bronze body with brass check mechanism, bronze seat, and bronze seal
• Connection size and type: 1/2 in. FNPT x FNPT with female NPT connections on both ends
• Flow rating: 10 gpm with Cv of 7.2
• Pressure ratings: 200 psi WOG, 125 psi WSP, and 200 psi at 150 degrees F maximum water pressure
• Temperature range: -20 degrees F to 425 degrees F
• Mounting orientation: Horizontal or vertical
• Dimensions: 2.625 in. overall length and 2 1/4 in. overall height
• Standards: ASTM B16, ASTM B505, ASTM B584, MSS SP-80
• Valve series: 509Y

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