Siemens Building Technology 257-02030 Valve Assembly R-407C which are optimized for standard

which are optimized for standard water applications

or if you hear a repetitive clicking noise

This is the factory blower assembly

33-degree pitch

leak-resistant fit within the refrigerant circuit

Siemens Building Technology 257-02030 Valve Assembly R-407C which are optimized for standardThe Siemens Building Technology 257 02030 Valve Assembly is a high precision solution for terminal unit control in hydronic systems. This 2 way normally open pneumatic valve is engineered with a 1 2 inch NPT connection and a robust forged brass body designed to handle water and 50% water glycol solutions. With a 0. 4 Cv equal percentage flow characteristic, it ensures stable modulating control for convectors, fan coil units, and reheat coils. The