Conbraco 19-KJHL-50 Valve

The Conbraco 19-KJHL-50 Valve is a high-capacity ASME Section VIII safety relief valve designed for demanding overpressure protection in unfired steam pressure vessels, cookers, and industrial piping systems. This 19 Series National Board capacity-certified valve features a 2" Male NPT inlet and a 2 1/2" Female NPT outlet, specifically calibrated at a 50 PSI set pressure. With a discharge rating of 4,475 pounds per hour, it is engineered to handle substantial mass flow while maintaining system integrity during critical relief events.

Constructed with a rugged bronze body and brass trim, this model utilizes Teflon (PFA) soft seating to ensure superior chemical resistance and tight shut-off even in high-vibration environments. The double-ring control design allows for precise blowdown adjustment, while the wide wrenching hex and tapped body drain simplify field installation and condensate management. This domestic, American-made safety valve is a staple for contractors managing steam boiler overpressure protection and pressure-reducing stations where ASHRAE and ASME compliance are non-negotiable.

Key Benefits

• High Discharge Capacity: Certified for 4,475 lb/hr to ensure rapid pressure stabilization in large-scale steam systems.
• Durable Sealing: The Teflon PFA seat resists boiler chemicals and provides a reliable seal compared to traditional metal-to-metal seats.
• Field Serviceability: Features an open lifting lever for required manual testing and a tapped drain to prevent condensate buildup in the valve body.
• Robust Construction: Built with an ASTM B584 bronze body and stainless steel springs for long-term reliability in harsh mechanical rooms.

Common Questions

What is the maximum temperature rating for the Teflon seat version?
The 19-KJHL-50 with PFA Teflon seating is typically rated for service temperatures up to 406°F, making it suitable for saturated steam applications.

Can this valve be used for liquid or water service?
No, the 19 Series steam pressure relief valve is specifically designed and National Board certified for steam, air, and non-hazardous gases. For liquid relief, a dedicated liquid service valve should be selected.

Why is the outlet larger than the inlet?
The 2 1/2" FNPT outlet is oversized relative to the 2" inlet to accommodate the rapid expansion of steam as it transitions from high to low pressure, minimizing backpressure and ensuring full flow capacity.

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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.