open-air-over (OAO) design ensures reliable operation in high-ambient exhaust environments

Engineered for high-sensitivity millivolt response to ensure rapid safety shut-off upon pilot failure

Direct OEM Matching: Engineered specifically for Goodman and Amana units to ensure seamless electrical integration

consider the Belimo B238 Valve

Siemens Building Technology 257-02044 Valve Assembly R-22 open-air-over (OAO) design ensures reliableThe Siemens Building Technology 257 02044 Valve Assembly is a contractor grade solution for precise fluid control in commercial HVACR systems. Utilizing the Powermite 599 MT Series architecture, this 2 way normally open valve is engineered for high performance regulation of hot or chilled water in terminal units like convectors and fin tube radiators. The assembly features a 3 4" NPT forged brass body and internal brass trim, ensuring long term