The Zonefirst SPRD-8 8" Round Barometric Static Pressure Regulating Damper is a critical component for maintaining system bypass airflow and duct integrity in multi-zone HVAC residential and light commercial applications

As a thermally supervised safety pilot

Broad Compatibility: Supports RTU/AHU

Precision Control: High-leverage valve linkage ensures stable regulation from maximum individual loads down to tiny pilot flows

ensuring optimal heat transfer and protecting the system from high-heat damage

Armstrong International 812-3/4-125 Steam Trap Els PW 17895 The Zonefirst SPRD-8 8" RoundThe Armstrong International 812 3 4 125 Steam Trap is a high performance inverted bucket steam trap engineered for superior condensate drainage in industrial steam systems. Constructed with a rugged cast iron steam trap body, this Series 812 model features a 3 4 inch NPT connection and is specifically designed to operate at a maximum pressure of 125 PSI. Utilizing a precision engineered 5 32 inch orifice, it ensures efficient heat transfer by