Common Questions What is the maximum duct width for the ST-10

Precise feedback signals allow for real-time monitoring of damper position

6A AC motor is compatible with models such as 502-A

which must be purchased separately if yours is out of spec

Siemens Building Technology 257-02040 Valve Assembly 320720-756 Common Questions What is theThe Siemens Building Technology 257 02040 is a specialized 2 way normally open control valve assembly designed for high performance hydronic flow regulation. As a veteran grade pneumatic HVAC control valve, this unit is engineered with a 1 2 inch angle NPT by union male connection, facilitating streamlined installation in tight mechanical spaces. The forged brass body and internal brass trim ensure rugged reliability against the constant cycling of