Armstrong International 30B4 Trap

The Armstrong International 30B4 is a premier 1" NPT Series B Cast Iron Float & Thermostatic Steam Trap designed for high-efficiency condensate drainage in industrial and commercial heating systems. Engineered for a maximum operating pressure of 30 PSI, this F&T steam trap features a robust 1/4" orifice and an integrated thermostatic air vent to ensure rapid air removal and prevent air binding during system start-up. The Armstrong 30B4 trap utilizes a high-leverage valve mechanism and a stainless steel float to provide modulated discharge, making it the ideal solution for modulating steam pressure applications where continuous condensate removal is critical. Its durable cast iron body ensures long-term reliability in demanding HVACR and process steam systems, maintaining optimal thermal efficiency while preventing water hammer. By ensuring precise condensate management, this trap optimizes heat transfer across coils, heat exchangers, and unit heaters.

• Continuous Condensate Drainage: Specifically designed for systems where modulating steam pressure requires immediate drainage.
• Efficient Air Venting: The built-in balanced pressure thermostatic air vent handles high-volume air loads during cold starts.
• Rugged Construction: Durable cast iron housing and stainless steel internal components resist corrosion and wear.
• Simplified Maintenance: The 1" NPT standard connection allows for easy integration and serviceability in existing piping layouts.
• Enhanced System Performance: Prevents condensate backup, ensuring maximum heat transfer efficiency and protection against water hammer.

How do I select the correct orifice size for my steam trap?
Orifice selection depends on the maximum differential pressure and the required condensate capacity. The Armstrong 30B4 with a 1/4" orifice is optimized for 30 PSI applications.

Can this F&T trap be used in outdoor installations?
While the Series B Cast Iron Float & Thermostatic Steam Trap is highly durable, outdoor installations require proper insulation and protection to prevent the condensate from freezing within the body.

Why is continuous drainage better than intermittent discharge for my heat exchanger?
Continuous drainage provided by a float and thermostatic trap ensures there is no condensate buildup, which maintains a constant temperature profile and prevents thermal shock.

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.