McDonnell & Miller 323300 Head Gasket

The McDonnell & Miller 323300 Head Gasket (Model 92-68) is a critical replacement component engineered specifically for Series 94 and 194 Low Water Cut-Offs and pump controllers. For veteran technicians, this gasket is the standard for maintaining a pressure-tight seal between the float chamber and the head mechanism. It is designed to withstand the rigorous thermal cycling and pressure fluctuations common in commercial and industrial steam boiler applications. Replacing the gasket during annual inspections or whenever the head is removed prevents dangerous leaks and ensures the low water cut-off maintains precise calibration, critical for protecting the boiler block from dry-fire conditions. This high-grade composite M&M 323300 gasket offers superior resistance to chemical additives and high temperatures without the need for additional adhesives, ensuring a clean and reliable fit for boiler safety controls.

• Precise OEM Fit: Specifically engineered for McDonnell & Miller 94 series and 194 series, ensuring the alignment of the head assembly is perfect for consistent float operation.
• High-Pressure Integrity: Constructed from a robust composite material that resists compression set and maintains a leak-free seal under standard steam operating pressures.
• Simplified Maintenance: Designed for easy removal and installation during routine LWCO blow-down inspections or internal cleaning.
• Thermal Stability: Features high heat resistance properties to prevent degradation in high-limit steam environments.

• Can I reuse the old 92-68 gasket if it looks intact? No. Once compressed, the gasket loses its ability to reform a perfect seal. Always use a new 323300 gasket whenever the head is disassembled to prevent steam or water leaks.
• Is this gasket compatible with Series 93 units? While some internal parts cross over, the Model 92-68 is specifically cataloged for Series 94 and 194. Verify your specific unit model number before installation.
• Does this require RTV or gasket sealant? No, this is a dry-fit gasket. Applying sealants can interfere with the seat and potentially cause assembly misalignment.

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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.