Kromschroder O-Ring 308x8 NBR70 shore black 03110013

The Kromschroder O-Ring 308x8 NBR70 shore black (SKU 03110013) is a static seal made of nitrile rubber (NBR) with a hardness of 70 Shore A. It has an inside diameter of 308 mm and a cross-section of 8 mm². This black O-ring is designed for use with the Kromschroder GFK 125/150 gas filter, sealing combustible gases and combustion air. It is not interchangeable across different assemblies and is identified by article number 624.373.001.

When selecting an O-ring of this type, verify that the inside diameter and cross-section match the groove dimensions exactly. The material compound and hardness must be suitable for the media and operating conditions. O-rings are not interchangeable across different assemblies, so ensure the part corresponds to the specific housing or valve. Before installation, inspect the groove for damage and lubricate the O-ring if recommended.

A failed O-ring of this kind can cause loss of pressure, media escape, or impaired safety function. Signs include visible leaks at flange joints, filter covers, or valve bonnets, and a drop in system pressure. Check the O-ring for cuts, abrasion, or compression set during routine maintenance.