Conbraco 12-208-08 Relief Valve

When you are protecting a medium to large commercial ASME Section IV boiler, you need a high-capacity relief solution that seals tight and fires reliably at the 15 PSI set pressure. The Conbraco 12-208-08 is a veteran industry standard designed for low-pressure steam heating systems. Its heavy-duty bronze body construction and corrosion-resistant stainless steel springs ensure longevity in harsh mechanical rooms. This steam pressure relief valve delivers a massive 4,100 pounds per hour capacity, providing the necessary overpressure protection for significant thermal loads. The 3-inch Male NPT inlet and 3-inch Female NPT outlet allow for direct, high-flow piping configurations without restrictive bushings. The PTFE-coated EPDM seat is critical here; it prevents the disc from sticking to the nozzle—a common fail point in older valves—ensuring a clean pop and positive reseal after every cycle. For any technician tasked with low pressure steam boiler maintenance, utilizing a National Board certified valve like the 12-208-08 is the best way to maintain code compliance and system safety.

• ASME Section IV Certified: Specifically engineered and National Board rated for 15 PSI low-pressure steam heating applications.
• High Discharge Capacity: Rated for 4,100 PPH to handle large steam volumes during an overpressure event.
• Durable Material Profile: Features an ASTM B584 bronze nozzle and body with a rust-proofed steel spring for superior reliability.
• Anti-Stick Performance: The PTFE-faced soft seating prevents the valve from sticking during long periods of inactivity, ensuring immediate response.
• Field-Serviceable Design: Includes a 3/8" NPT side tapping for easy drain piping to prevent condensate accumulation around the seat.

What is the maximum operating temperature for this valve?
The 12-208-08 is rated for saturated steam up to 250°F, making it ideal for standard low-pressure commercial heating boilers.

Can this valve be mounted horizontally?
No. To meet ASME Code requirements and ensure proper operation, this valve must be installed in a vertical upright position with the spindle vertical.

Is this valve suitable for potable water systems?
This specific model is a Section IV steam relief valve. It is designed for steam heating and processing boilers and is not intended for domestic hot water supply or potable water heaters.

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.