Conbraco 21-250-03 Gauge Valves

The Conbraco 21-250-03 is a professional-grade rough bronze water gauge valve set engineered for reliable liquid level monitoring in commercial and industrial boiler applications. Featuring 1/2" NPT male connections and extended shanks, these valves are designed for straightforward installation through thick insulation or vessel walls. The integral automatic ball checks provide a critical safety interface, preventing the rapid escape of fluid in the event of glass breakage. This set is built for durability, utilizing Teflon stem packing for leak-free performance and EPDM glass seals that maintain integrity under thermal cycling. Rated for 200 PSI at 400°F and up to 400 PSI at 100°F, these Apollo water gauge valves ensure stable operation in high-pressure environments. The inclusion of an aluminum type wheel allows for precise manual control, making it a standard choice for technicians seeking a rugged, NPT water gauge solution for liquid level glass sets.

• Enhanced Safety: Built-in automatic ball checks serve as a primary safety mechanism to shut off flow if the gauge glass fails.
• High-Temperature Durability: Equipped with Teflon stem packing and EPDM seals to withstand operating temperatures up to 400°F.
• Rugged Construction: The rough bronze body resists corrosion and mechanical stress in demanding boiler room environments.
• Extended Installation Flexibility: The extended shank design facilitates mounting on vessels with heavy insulation or lagging.
• Standardized Compatibility: Features universal 1/2 inch NPT connections, ensuring compatibility with standard industrial piping and 5/8" OD gauge glass.

What is the purpose of the automatic ball checks in this valve set?
The automatic ball checks are designed to seat immediately if the gauge glass breaks, preventing hot water or steam from venting uncontrollably into the mechanical room.

Can these valves be used with high-pressure steam?
Yes, the Conbraco 21-250-03 is rated for 200 PSI at 400°F, making it suitable for many saturated steam applications within those specific pressure and temperature limits.

What size gauge glass is required for these valves?
These valves are typically designed to accommodate standard 5/8" outer diameter (OD) rigid glass or plastic tubing for level indication.

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.