21432 - ESAB Replacement Neoprene O-Ring 2.10 ID x .210 CS 70A

High-Performance Neoprene Sealing Solution

The ESAB 21432 O-Ring is a critical component designed for precision sealing within industrial and welding equipment assemblies. Manufactured from high-quality Neoprene, this O-ring is engineered to provide a reliable barrier against fluids and gases, ensuring the integrity of your machinery's operation. With an Inner Diameter (ID) of 2.10 inches and a substantial Cross Section (CS) of 0.210 inches, it is sized for specific housing grooves where a robust seal is required to prevent leakage and maintain system pressure.

Material Properties: Neoprene 70A

The choice of material is paramount in sealing applications. This O-ring is crafted from Neoprene (Polychloroprene), a synthetic rubber known for its well-rounded chemical stability. Unlike natural rubber, Neoprene exhibits superior resistance to degradation from sun, ozone, and weather, making it suitable for equipment that may be exposed to varied environmental conditions. Furthermore, it offers moderate resistance to oils and chemicals, which is essential in welding environments where coolants, lubricants, or shielding gases may be present. The "70A" designation refers to its Shore A Durometer hardness. A 70A hardness is the industry standard for most O-rings, offering the perfect balance between flexibility for easy installation and stiffness to resist extrusion under pressure.

Maintenance and Installation

Replacing worn or damaged O-rings is a fundamental aspect of preventative maintenance. Over time, seals can suffer from compression set—where they lose their elastic memory—or develop micro-cracks due to thermal cycling and chemical exposure. Installing the ESAB 21432 ensures you are restoring your equipment to factory specifications. When installing this O-ring, ensure the mating surfaces are clean and free of debris. A light application of a compatible lubricant can help seat the O-ring correctly, preventing twisting or pinching which could compromise the seal. Whether used in a wire feeder mechanism, a gas regulator connection, or a coolant path, this genuine replacement part delivers the durability expected from professional-grade components.

Applications

While specifically identified by the SKU 21432, this O-ring's dimensions and material make it a versatile spare part. It is typically utilized in systems requiring a static seal, where the mating parts do not move relative to each other, though Neoprene 70A can also handle slow dynamic applications. Its robust profile (0.210" thickness) allows it to bridge larger gaps and tolerate surface imperfections better than thinner O-rings.