0740-0102 - Victor SR400 Series LP Regulator Seat and Stem Kit

Professional Repair Parts for Victor Regulators

Keep your oxy-fuel and heating equipment in top condition with the Victor 0740-0102 LP Seat & Stem Assembly. Designed for professional welders and fabricators who rely on Victor's heavy-duty regulators, this replacement assembly is the heart of your pressure control system. It is specifically calibrated and material-compatible for LP (Propane) and Natural Gas service, ensuring that the soft seat material does not degrade when exposed to these fuel gases, which can happen if incorrect oxygen-service parts are used.

This assembly fits the legendary Victor SR 400, SR 450, and SR 700 series regulators. These regulators are workhorses in the industry, often found in shipyards, fabrication shops, and construction sites. The seat and stem mechanism is responsible for opening and closing the high-pressure inlet to regulate downstream pressure. A worn seat is the number one cause of regulator failure, typically manifesting as "creep"—where delivery pressure rises uncontrollably when the downstream valve is closed. Replacing the seat and stem is a standard repair procedure that can significantly extend the life of your expensive regulator body.

The 0740-0102 comes pre-assembled, combining the stem and the sealing seat into one unit for easier installation during a regulator overhaul. When rebuilding a regulator, cleanliness is key; always ensure the internal body cavity is free of particulates before installing the new seat. By choosing genuine Victor parts from Welders Supply, you are investing in the reliability of your equipment. Don't let a leaking regulator compromise your weld quality or shop safety—refresh your setup with this essential repair component.

Compatibility & Usage

This part is strictly for fuel gas regulators (LP/Propane/Natural Gas) and should not be used in Oxygen regulators due to material incompatibilities. Always verify your regulator model number before ordering repair parts to ensure proper fitment and safety.