Siemens Building Technology 257-02031 Control Valve Assembly 326070-701 requiring a full kit replacement

requiring a full kit replacement for reliability

Always verify your furnace model number before installation

refer to York service bulletin 50

making it a reliable choice for air service applications requiring a 1/2 inch compressed air regulator with secondary aspiration to maintain a steady setpoint under load

Regulatory Compliance: Meets ASME Section IV and CSA XL21 standards for safety-critical pressure relief

Siemens Building Technology 257-02031 Control Valve Assembly 326070-701 requiring a full kit replacementFor 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