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two brass pressure taps
this part is the current official replacement and provides full backwards compatibility with all systems previously utilizing the 100167689 or RLY2108 sequence
What causes a thermopile to fail in a millivolt system
If your blower wheel is cracked or balanced improperly
Operating at 115V and 1/70 HP
Siemens Building Technology 257-02008B Valve Assembly 322838-754 two brass pressure tapsWhen you are managing terminal unit applications like convectors or fan coil units, the Siemens Building Technology 257 02008B Valve Assembly is a reliable choice for throttling or shut off control. This 2 way normally closed pneumatic valve is engineered with a 1 2" NPT connection and a 2. 5 Cv rating, utilizing a modified equal percentage flow characteristic to ensure stable heat transfer in chilled or hot water systems. The forged brass body is