1/4" MFL x 1/4" FFL 304 Stainless Steel Inline Gas Check Valve - Ball & Spring Backflow Preventer

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1/4" MFL x 1/4" FFL 304 Stainless Steel Inline Gas Check Valve - Ball & Spring Backflow Preventer

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  • 304 Stainless Steel Construction: This stainless steel gas check valve provides ultimate corrosion resistance for CO2 and Nitrogen draught systems.
  • Reliable Backflow Prevention: Features a ball-and-spring mechanism that instantly stops beer from contaminating gas regulators and air manifolds.
  • Universal 1/4" Flare Interface: Equipped with 1/4 inch MFL and FFL connections, making it a perfect fit for ball lock and pin lock disconnects.
  • High-Flow Inline Design: Engineered to minimize gas flow restriction while maintaining a 100% liquid-tight seal against reverse pressure.
  • Industrial Grade Safety: An essential draft beer safety component that prevents expensive equipment damage and beverage system downtime.

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Protect your high-end gas regulators and manifolds with this professional-grade 304 Stainless Steel Inline Gas Check Valve. Specifically engineered for CO2, Nitrogen, and mixed-gas draft systems, this valve utilizes a precision-machined ball-and-spring mechanism to provide a definitive one-way flow path. Designed to allow high-volume gas delivery while instantly sealing against reverse liquid flow, it acts as a critical fail-safe to prevent beer or soda from backing up into your gas lines during pressure drops or keg changes. Its all-stainless construction offers superior corrosion resistance and prevents the internal "sticking" common with plastic or brass check valves in high-moisture walk-in coolers.

  • Material: Food-Grade 304 Stainless Steel Body, Ball, and Spring
  • Connections: 1/4" MFL (Male Flare) Inlet x 1/4" FFL (Female Flare) Outlet
  • Mechanism: Heavy-Duty Ball-and-Spring Backflow Preventer
  • Compatibility: Ideal for CO2, Nitrogen, and Beer-Gas (G-Mix) systems
  • Installation: Inline design for direct mounting to gas disconnects or flare fittings
  • Function: High-flow gas delivery with 100% liquid backflow protection
  • Durability: Engineered for high-pressure draught service and frequent sanitation cycles
Technician's Note: This valve is directional and must be installed with the 1/4" MFL side facing your gas source. The 1/4" FFL side (swivel nut) typically threads directly onto your "Gas In" keg disconnect. Because this uses a mechanical spring, it requires a small amount of "cracking pressure" to open; if you experience zero gas flow after installation, verify the valve isn't installed in reverse. We recommend using a Flare Washer (cone washer) on the MFL side to ensure a 100% gas-tight, metal-to-metal seal.

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