30Z58 - ESAB R-501 Regulator Replacement Diaphragm Assembly

Keep Your R-501 Regulator Running Smoothly

If you are a welder or fabricator relying on an R-501 regulator, you know that consistent gas pressure is the key to a quality cut or weld. When your regulator starts "creeping"—where the needle on the low-pressure gauge keeps climbing after you've closed the torch valve—or if you notice the pressure fluctuating wildly during use, it's likely time to replace the diaphragm. The ESAB 30Z58 Diaphragm is the direct replacement part you need to fix these issues and get back to work safely. Don't let a worn-out rubber part force you to buy a brand-new regulator when a simple repair can make it run like new.

The diaphragm is the moving part inside your regulator that does all the work. It flexes thousands of times as you open and close your torch, and eventually, it loses its elasticity or develops small cracks. This genuine ESAB replacement is built tough to handle the rigors of daily shop use. It restores the sensitivity of your pressure adjustment knob, allowing you to dial in the exact PSI needed for your cutting tip or welding nozzle. Because it is an OEM part, you don't have to worry about fitment issues; it drops right into the R-501 housing just like the original.

Repairing your own gear is a badge of honor for many tradesmen, but it also saves money. A regulator rebuild is a fraction of the cost of a new heavy-duty regulator. By swapping out the old 30Z58 diaphragm, you eliminate gas waste caused by leaks and ensure your flame stays neutral during critical cuts. This part is essential for anyone maintaining a fleet of oxy-fuel equipment or a personal rig that sees heavy action. Keep a spare in your toolbox so a blown diaphragm never shuts down your project.

Why Choose Genuine Parts?

Using the correct ESAB 30Z58 diaphragm guarantees that your regulator maintains its safety ratings. Generic rubber sheets or ill-fitting parts can fail under pressure, leading to hazardous situations. This part is specifically molded for the R-501's seat and bonnet design, ensuring a leak-proof seal and reliable operation for years to come.