Xylem-Bell & Gossett 116300 D-40 ASME Diaphragm Expansion Tank 25 Gallon

The Xylem-Bell & Gossett 116300 is a Series D model D-40 ASME-rated pressurized expansion tank with a 25-gallon total volume and 20.2-gallon acceptance capacity. This ASME-certified, precharged pressure vessel features a diaphragm design specifically engineered for commercial and industrial hydronic heating and cooling systems.

Key Features:

• ASME-certified precharged pressure vessel with diaphragm design
• Carbon steel shell construction with heavy-duty butyl rubber diaphragm
• 125 PSI maximum working pressure and 240°F maximum operating temperature
• Factory pre-charged at 12 PSI
• Built-in bladder integrity monitor for easy system diagnostics
• 1/2 inch NPTM connection for system integration
• Not for potable water systems

When water temperature changes, this tank is specifically engineered to absorb the expansion forces in heating and cooling systems, ensuring that the system maintains the correct pressure under fluctuating operating conditions. The robust diaphragm inside the tank effectively separates the system water from the air charge, preventing any issues related to waterlogging. The tank is customizable with optional sight glass and seismic restraints.

This unit replaces part number 116493 and is ideal for commercial buildings, industrial facilities, process water systems, and fire protection applications requiring reliable pressure control.