Siemens Building Technology 658-0051 Valve 320788-704 The 1/2" NPT connections allow

The 1/2" NPT connections allow for seamless integration into existing return lines

This part is commonly used in the HUMXXSTM3034

maintaining the UL-certified safety profile of the original equipment

stabilizing the system’s draft and preventing short-cycling

ensuring consistent snap-action connectivity even in harsh outdoor environments

Siemens Building Technology 658-0051 Valve 320788-704 The 1/2" NPT connections allowThe Siemens Building Technology 658 0051 is a professional grade 3 way sequencing valve engineered for precision modulation in 4 pipe HVAC systems. With a 1 2 inch flare connection and a 2. 5 Cv flow coefficient, this Powertop series valve is designed to manage hot and chilled water flow to radiant panels and induction units without mixing. The equal percentage flow characteristic ensures linear thermal output, providing tight control over terminal