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Precise 2-Speed CFM Output: Matches the factory-spec airflow for both low-fire and high-fire cycles
consider using an isolation transformer or floating the transformer secondary to prevent short circuits
The Johnson Controls TEC3313-14-000 is an advanced
Direct-Coupled Versatility: Features a universal bonnet for tool-free actuator installation
Siemens Building Technology 257-02031 Control Valve Assembly 320074-702 Precise 2-Speed CFM Output: MatchesFor veteran mechanical contractors managing commercial hydronic systems, the Siemens 257 02031 provides a reliable, field proven solution for precise fluid regulation. As a core component of the Powermite 599 MT Series, this 2 way normally open pneumatic control valve is engineered for terminal units, hydronic heating coils, and chilled water applications. The assembly integrates a high performance 1 2" brass globe valve with a 2 inch pneumatic
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