Conbraco Industries 20-251-03 Gauge Valves

The Conbraco Industries 20-251-03 1/2" NPT Gauge Valve is a heavy pattern, rough bronze water gauge set engineered specifically for demanding industrial and commercial boiler applications. As a veteran-grade bronze gauge cock, this unit features 1/2" MNPT connections and is built to withstand extreme thermal cycling and pressure fluctuations. This set is equipped with automatic ball checks as a standard safety feature, designed to prevent fluid loss and maintain system integrity in the event of a glass breakage. The integration of Teflon stem packing ensures low-friction operation and a reliable seal against the stem, while the EPDM glass seal provides high-performance resilience against leaks. Rated for 400 PSI at 100°F and 200 PSI at 400°F, this industrial water gauge valve utilizes a durable Bakelite composition wheel for manual isolation, ensuring longevity in high-heat environments where standard plastic handles often fail.

Key Contractor Benefits:

• Enhanced Safety: Internal automatic ball checks provide immediate shut-off of medium if the gauge glass is compromised.
• High-Temperature Durability: The rough bronze construction and Bakelite wheel handle heat up to 400°F without degradation.
• Leak Prevention: Reliable Teflon stem packing and EPDM seals reduce maintenance intervals and prevent nuisance leaks.
• Standardized Fit: 1/2" MNPT water gauge valve connections allow for straightforward integration into existing industrial piping headers.
• Heavy-Duty Pattern: Designed with a thicker body wall than standard valves to handle the rigors of HVAC water gauge systems.

Common Questions:

Does this gauge valve include the glass tubing?
No, the Conbraco 20-251-03 is a valve set only. It is designed to accommodate standard 5/8" OD glass tubing, which must be sourced separately based on your specific center-to-center requirements.

What is the purpose of the automatic ball check feature?
The automatic ball checks are safety components that seat themselves via the flow of the pressurized medium if the gauge glass breaks, preventing a continuous discharge of hot water or steam into the mechanical room.

Can these valves be used in steam applications?
While often used in water systems, these bronze gauge valves are rated for 200 PSI at 400°F, making them suitable for low to medium pressure steam and hot water applications within those specific technical limits.

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.