Utica-Dunkirk 240008261 O-Ring

The Utica-Dunkirk 240008261 O-Ring is a precision-engineered #234 silicone seal designed for critical tolerances in high-efficiency hydronic boiler systems. In the field, having a reliable seal on high-performance units like the Helix VLT or ECR97 series is the difference between a successful service call and a return visit. This silicone o-ring (SLCN) is specifically formulated to handle the thermal cycling and chemical exposure common in condensing boiler operations without losing elasticity or suffering from compression set.

Built to the AS568-234 standard, this component features a consistent 3.55 x 4.05 x .85 dimensional profile, ensuring a leak-proof fit for the heat exchanger and burner assemblies it serves. For technicians working on HVX or DKVLT models, this direct replacement part provides the exact durometer rating required to maintain system pressure and prevent combustion gas leakage. Relying on genuine Utica Dunkirk parts guarantees that your boiler maintenance meets original equipment manufacturer (OEM) specifications for long-term operational integrity.

• High-Temperature Resilience: The silicone construction maintains a secure seal despite the rapid temperature fluctuations found in gas-fired boilers.
• Precise Fitment: Designed as a #234 size o-ring, it eliminates the risk of bypass or extrusion in high-pressure hydraulic paths.
• Broad Compatibility: Engineered for use across multiple lines including Utica ECR97, Dunkirk DKVLT, and HVX series units.
• Chemical Resistance: Robust enough to withstand the corrosive environment of condensate and boiler water treatment additives.

• What units is the 240008261 compatible with? It is the standard seal for VLT-050 through VLT-100, HVX-050 through HVX-200, and ECR97 series boilers.
• Why use silicone instead of standard EPDM? Silicone offers superior thermal stability for burner seals and inspection kits, preventing brittle failure under high-heat conditions.
• Is this an OEM replacement? Yes, this is the official Utica-Dunkirk replacement part, ensuring match-fit for the 240008261 part number.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.