21827 - ESAB R-22 Regulator Diaphragm Plate Replacement

Precision Component for Regulator Maintenance

The ESAB 21827 Diaphragm Plate is a specialized internal component engineered for the maintenance and repair of the R-22 series of gas regulators. In the world of industrial gas control, the regulator is the heart of the system, stepping down high-pressure cylinder gas to a usable working pressure. The diaphragm assembly is the critical mechanism that balances these forces, and the diaphragm plate plays a vital role in this operation. It acts as the rigid backing that supports the flexible diaphragm material, transmitting the force from the pressure spring to the valve stem.

Over time, internal components of regulators can experience wear or fatigue due to the constant cycling of pressure and the harsh environments of welding and cutting. While the flexible diaphragm itself is often the first item to be replaced, the metal diaphragm plate must also be in pristine condition to ensure uniform force distribution. A damaged or warped plate can lead to erratic pressure delivery, "creep" (where delivery pressure rises when the torch is off), or safety hazards. Using genuine ESAB parts like the 21827 ensures that the replacement matches the exact weight, dimensions, and material specifications of the original, preserving the regulator's calibration and response characteristics.

This part is specifically designed for the R-22 model, a workhorse in the industry known for its durability and flow capacity. Whether you are refurbishing a vintage Purox unit or maintaining a modern ESAB R-22, this diaphragm plate is the correct OEM specification. Professional repair technicians understand that substituting generic parts in gas equipment can compromise safety and performance. By choosing the ESAB 21827, you are investing in the continued reliability and safety of your oxy-fuel or shielding gas setup.

Key Technical Benefits

• OEM Accuracy: Manufactured to the original blueprints for the R-22 series, ensuring zero variance in fit or function.


• Durability: Constructed from high-grade metal to withstand the internal spring pressures of industrial regulators.


• Safety: Ensures the diaphragm moves linearly and predictably, preventing pressure spikes or regulation failures.