Siemens Building Technology 257-02040 Valve Assembly 319848-301 persistent voltage drops or physical

persistent voltage drops or physical signs of overheating at the connector usually indicate the need for a replacement

This medium-sized enclosure features a patented double-wall construction that provides an extra layer of protection against unauthorized setpoint adjustments and physical damage

For contractors performing HVAC blower assembly repair

Built with heat-resistant materials

Siemens Building Technology 257-02040 Valve Assembly 319848-301 persistent voltage drops or physicalThe 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