De Dietrich S101565 gasket 83 mm with 45-115 kW valve

This gasket, 83 mm in diameter, is identified for use with a gas valve in the 45 to 115 kW output range, as per the product listing. It belongs to the category of boiler filters, gaskets and seals, which are routine consumables during service visits. Gaskets of this type serve to maintain a gas-tight or fluid-tight seal between mating flanges or components in a gas train or boiler assembly. Any leak at such a joint can impair safety, upset the gas-to-air ratio, or allow flue gas recirculation, so the seal must be intact and correctly compressed when the system is reinstated. Selection of a replacement gasket depends on exact dimensions – here the bore and outside diameter given – and on the material, which must be compatible with the medium (natural gas, LPG, or oil) and the operating temperature range. Common gasket materials for gas valves include fibre, graphite, or a bonded elastomer, each rated for a specific service. No material is specified for this article, so the engineer should verify the existing gasket’s composition or consult the valve manufacturer’s documentation to confirm the correct replacement. When installing, ensure both sealing faces are clean and free of debris; overtightening can distort the gasket, while under‑torquing may leave a leak path. This gasket is a single component, not a repair kit. Repair kits are compiled for a specific valve or regulator series and are not interchangeable; a single gasket alone does not include the other wearing parts (such as O‑rings, diaphragms, or filters) that might be needed during an overhaul. If the valve body itself has been serviced, or if there are multiple sealing points, a full kit may be the more appropriate choice. Always match the gasket to the exact valve model and observe the torque specifications recommended by the equipment manufacturer.