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this instrument is the standard for contractors performing boiler maintenance and repair
allowing proper cooling during continuous operation
High-Flow Purging: Includes a dedicated purge lever to speed up the air removal process during initial hydronic system commissioing
Is the 71520318 a direct fit for the older 71520304 model
Siemens Building Technology 147-2000 Relay 320788-704 this instrument is the standardThe Siemens Building Technology 147 2000 Relay is a precision engineered pneumatic positioning relay designed for demanding HVAC automation environments. This compact auxiliary device is essential for ensuring positive positioning of pneumatic valve actuators and damper actuators. By utilizing a low bleed design, the 147 2000 minimizes air consumption while responding to input changes as small as 1 10 PSI. The unit allows for highly accurate field