The ZoneFirst SPRD-12X12 is a professional-grade barometric static pressure regulating damper engineered to maintain system integrity in multi-zone residential and commercial HVAC applications

Key Benefits for the Contractor Automatic Pressure Calibration: The self-adjusting balanced pressure element eliminates the need for manual orifice changes across its entire operating range

The 340-004-605 is the port assembly

Universal Compatibility: One-to-one replacement for over 20 legacy Barber Colman and Schneider Electric part numbers

Superior Insulation: Features a single porcelain design and high-temperature lead wires to prevent arcing and dielectric breakdown

Armstrong International 15B3 Connection 30067439-890 The ZoneFirst SPRD-12X12 is aThe Armstrong International 15B3 is a high performance Series B cast iron float and thermostatic steam trap designed for industrial and commercial heating systems. Featuring a 3 4 inch NPT connection and a precision engineered 7 32 inch orifice, this unit is optimized for systems with a maximum operating pressure of 15 PSI. It excels at modulating steam loads, ensuring the continuous drainage of condensate while the integrated thermostatic air vent