21214 - ESAB 21214 Replacement O-Ring - CR 70A Material

Technical Overview of the ESAB 21214 O-Ring

The ESAB 21214 O-Ring is a precision-engineered sealing component designed to meet the rigorous demands of industrial machinery and welding equipment. This particular O-ring is characterized by its specific dimensional properties: an Inner Diameter (ID) of 2.484 inches and a Cross Section (CS) width of 0.139 inches. These dimensions are critical for ensuring a proper interference fit within the designated gland or groove of the assembly, preventing fluid or gas bypass under pressure.

Material composition is a key factor in the performance of this component. It is manufactured from Chloroprene Rubber (CR), commonly known by the trade name Neoprene. Chloroprene is a versatile synthetic rubber that exhibits a balanced combination of properties. It provides moderate resistance to petroleum-based oils and fuels, while offering superior resistance to sunlight, ozone, and weathering compared to standard nitrile rubber. This makes the ESAB 21214 particularly suitable for equipment that may be exposed to varied environmental conditions or incidental chemical contact.

The durometer, or hardness, of this O-ring is rated at 70A on the Shore A scale. This is the standard hardness for most industrial O-rings, offering an optimal balance between elasticity and resistance to extrusion. A 70A durometer ensures that the seal is soft enough to conform to surface irregularities for a tight seal, yet hard enough to resist deformation under moderate pressure. When replacing seals in ESAB equipment, utilizing the correct part number ensures material compatibility and dimensional accuracy, maintaining the original engineering specifications of the machine.

Proper installation and lubrication are recommended to extend the service life of the O-ring. Ensure the mating surfaces are clean and free of burrs before installation to prevent damage to the elastomer.