Relying on genuine ClimateMaster parts ensures that your diagnostics remain accurate to factory specifications

extending the life of the internal seals

this heavy-duty solenoid coil features an extended 59-inch lead

maintaining the airtight seal required for optimal draft and secondary heat exchanger performance

Key Benefits for Technicians Efficient Serviceability: The internal cartridge can be replaced without removing the valve body from the piping

Siemens Building Technology 257-02030 Valve Assembly 321042-401 Relying on genuine ClimateMaster partsThe 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