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this positive pressure switch supports electrical ratings up to 15 Amps non-inductive at 277 VAC or 300 VA pilot duty
specifically engineered for precision temperature control in low-pressure steam and hot water hydronic systems
This allows technicians to install multiple belts on a single drive without the risk of uneven load distribution or premature wear
making it a practical solution for service and retrofit work
Siemens Building Technology 274-03054 Valve Assembly 320788-703 this positive pressure switch supportsThe Siemens Building Technology 274 03054 Valve Assembly is a precision engineered control solution for commercial HVACR hydronic systems. This factory assembled 2 way normally open valve features a 1 2" NPT connection and a 1. 0 Cv rating, optimized for low flow modulation in fan coil units, air handlers, and reheat coils. The bronze body (UNS CA 844) is paired with stainless steel trim and high temperature packing, enabling the assembly to handle