Conbraco 18C-512-3-150 Valve

The Conbraco 18C-512-3-150, a high-capacity Apollo 18C-500 series temperature and pressure relief valve, is engineered specifically for the protection of commercial-grade hot water heaters and storage tanks. Featuring a 3/4" Female NPT inlet and outlet, this automatic T&P valve is factory set to discharge at a 150 PSI relief pressure and a temperature of 210??F. With an impressive ASME Section IV certified capacity of 1,912,000 BTU/hr, it is a critical component for high-output hydronic systems. The unit utilizes a rugged ASTM B584 bronze body and a 3" probe length element coated with a specialized material to prevent mineral buildup and corrosion, ensuring long-term seat-to-disc alignment. For technicians managing high-volume domestic water heating configurations, this commercial T&P valve provides the necessary over-pressure and thermal safety margins required by current code standards including ANSI Z21.22 and CSA listings.

• High BTU Rating: Capable of managing up to 1,912,000 BTU/hr, making it suitable for large-scale commercial storage tanks.
• Corrosion Resistance: Features a protective element coating and a silicone seat disc to resist scaling and aggressive water conditions.
• Industry Compliance: Fully certified to ASME Section IV standards and CSA registered for mission-critical safety applications.
• Reliable Construction: Built with a heavy-duty bronze body and tamper-resistant bonnet screws for professional-grade durability.

Is this valve suitable for steam boiler applications?
No, the 18C-500 series is specifically designed for commercial hot water heaters and storage tanks; it is not intended for steam service.

What is the function of the 3-inch probe?
The probe monitors the temperature of the water at the top of the tank. When it reaches 210??F, the element expands to open the valve, preventing the system from reaching dangerous boiling temperatures.

Can I use a 3/4" discharge line with this valve?
Yes, the outlet is 3/4" NPT, but ensure the discharge piping is as short as possible and never smaller than the valve outlet to avoid backpressure.

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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.