Smith Equipment H697 Torch Mount Reverse Flow Check Valves (Pair)

Protect Your Shop with Miller Smith H697 Check Valves

Safety is the number one priority when working with oxy-fuel equipment, and the Miller Smith H697 Reverse Flow Check Valves are an essential component of any professional setup. Whether you are cutting thick steel plate, brazing HVAC lines, or performing general heating applications, the risk of gas mixing is a real danger. These check valves act as the first line of defense, ensuring that oxygen stays in the oxygen hose and fuel stays in the fuel hose, preventing the dangerous back-flow that can lead to equipment damage or injury.

Designed by Smith Equipment (now part of the Miller Electric family), these valves are built to the highest standards of quality and reliability. The set comes as a pair, clearly marked for Oxygen and Fuel to prevent installation errors. They feature standard B-size (9/16-18) threads, making them compatible with the vast majority of torch handles and hose sets on the market today. Installation is simple: just screw them onto your torch handle inlets before attaching your hoses. Their compact design adds minimal weight and length to your torch, ensuring that your tool remains balanced and comfortable to use during long shifts.

Why do you need these?
If a tip gets clogged with spatter or a tank runs dry unexpectedly, higher-pressure gas can travel backward into the opposite hose. Without a check valve, you risk creating an explosive mixture in your lines. The H697 valves sense this pressure change and snap shut instantly. They are designed with a low cracking pressure, meaning they open easily to let gas flow when you want it to, without starving your flame or causing fluctuations.

At Welders Supply, we recommend inspecting your safety gear regularly. If your current check valves are old, damaged, or of unknown origin, upgrading to the Miller Smith H697 set is a cost-effective way to ensure peace of mind. These valves are suitable for use with Acetylene, Propane, Propylene, and Natural Gas. Don't compromise on safety—equip your torches with genuine Miller Smith check valves today.