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Duotone terrace — saffron brief on the left, garden-folded ledger on the right.
Fail-Safe Operation: The normally open 2-way valve configuration ensures continuous flow when the coil is de-energized
Unlike standard on/off cycling controls
The S97009281 assembly features precise mounting apertures for the 9417DN heater fan
When you're troubleshooting a furnace that won't ignite or is short-cycling
using it on non-specified units is not recommended due to specific drain port offsets and mounting points
Siemens Building Technology 257-02056 Valve Assembly 318518-761 Fail-Safe Operation: The normally openThe Siemens 257 02056 is a professional grade 2 way normally open pneumatic valve assembly engineered for precise proportional control in heating and cooling applications. This 1 2 inch NPT x Union Male unit features a forged brass body and stainless steel trim, ensuring high durability and resistance to scaling in demanding hydronic systems. With a 2. 5 Cv rating and equal percentage flow characteristic, it provides stabilized heat output even under