Conbraco Industries 13-511-B15 Relief Valve

The Conbraco Industries 13-511-B15 is a high-performance ASME Section IV steam relief valve specifically engineered for residential and commercial low-pressure steam heating boilers. Featuring a 3/4 inch male NPT inlet and a 3/4 inch female NPT outlet, this bronze-bodied safety valve is factory-set at 15 PSI with a certified discharge capacity of 407 PPH (pounds per hour). As a veteran-grade boiler safety valve, it utilizes a PTFE-faced disc to ensure positive shut-off and resistance to seat sticking, even after long periods of inactivity. The design incorporates a positive drainage feature that prevents condensate from accumulating in the seat area, significantly reducing the risk of scale buildup and corrosion that can lead to pressure relief valve failure in critical heating systems.

Key Benefits for Contractors:

• ASME Section IV Certified: National Board capacity-certified for compliance with strict boiler safety codes.
• Corrosion-Resistant Bronze Body: Heavy-duty construction provides long-term durability in harsh saturated steam environments.
• High Discharge Capacity: Rated at 407 PPH to handle significant thermal expansion and prevent overpressure conditions.
• PTFE-Faced Seat: Ensures a tight seal and reliable pop-action opening at the 15 PSI set point.
• Simplified Installation: Standard 3/4" NPT threads allow for direct replacement in most boiler manifolds.

Common Questions & Technical Insights:

What is the maximum temperature rating for this valve?
The 13-511-B15 is rated for saturated steam service up to 250°F (121°C).

Can I use a reducer on the discharge piping?
No. To maintain the 407 PPH steam relieving capacity, the discharge pipe must match the 3/4" outlet size exactly as per ASME Section IV code requirements.

Is this valve suitable for water service?
This is an ASME Section IV steam valve. For hot water heating systems, a valve specifically rated for water (Section IV Water) should be used to ensure correct BTU discharge ratings.

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.