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639109 - Fuel Gas Reverse Flow Check Valve LIN-6662

Packaging: pack of 1
$26.76/EA $16.98/pack of 1 only $16.98/EASave 37%

Usually ships within 3-5 business days

OVERVIEW

Stay Safe with Reliable Backflow Prevention

Safety is paramount when working with oxy-fuel equipment, and the Lincoln Electric Fuel Gas Check Valve (LIN-6662) is your first line of defense against dangerous reverse flow conditions. Whether you are cutting steel or brazing pipe, keeping your fuel gas flowing in only one direction is critical to preventing accidents. This high-quality check valve automatically closes if pressure shifts, stopping gas from backing up into your hoses or regulators.

Built to last, this valve features a rugged brass housing that stands up to the wear and tear of daily shop use. It is designed specifically for fuel gases—indicated by the standard left-hand threads and groove indicators—making installation straightforward and error-free. Don't take chances with your setup; ensure your torch or regulator is equipped with a functioning check valve. It is a small investment that provides peace of mind, allowing you to focus on laying down the perfect bead or making the perfect cut.

Additional Information
Gas Type:Fuel Gas
Product Type:Check Valve
Packaging Description:1 Per Ea
Material:Brass
Thread Direction:Left-Hand
Application:Oxy-Fuel Safety

INCLUDED

  • 1x Fuel Gas Check Valve (LIN-6662)

APPLICATIONS

  • Oxy-Fuel Cutting
  • Gas Welding
  • Brazing and Soldering
  • Heating Applications
  • Metal Fabrication

FAQ

The main purpose is to allow gas to flow in only one direction, preventing the reverse flow of gases which could lead to dangerous mixing in the hoses or regulator.

No, a check valve only stops the reverse flow of gas. It does not stop a flame front. For flame protection, a flashback arrestor is required.

No, this specific valve is designed for Fuel Gas service only. Oxygen valves have right-hand threads, while fuel valves have left-hand threads to prevent cross-connection.

The valve body usually has an arrow indicating the direction of gas flow. Ensure the arrow points away from the supply and towards the torch.

The valve body is constructed from durable brass, which is standard for oxy-fuel gas equipment due to its spark resistance and durability.

Check valves should be tested regularly (at least every 6 months) for leaks and reverse flow. They should be replaced if they fail a test or show signs of physical damage.

Yes, it is generally compatible with common fuel gases like Acetylene, Propane, and Propylene, provided the connection threads match.

No, this is an accessory that attaches to the regulator or torch. It does not control pressure; it only controls flow direction.