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The McDonnell & Miller SA259-24 is the upper fitting specifically designed to connect to the top of the gauge glass or water column
featuring an integrated time delay relay that optimizes airflow by managing the fan motor’s post-purge cycle
The unit features 18-inch leadwires for flexible wiring within tight mechanical enclosures and includes a manual lever for emergency positioning during power failures or system testing
professional install
Schneider Electric (Barber Colman) 2353-501 Relay Els PW 29614 The McDonnell & Miller SA259-24The Schneider Electric 2353 501 Pneumodular Diverting Relay is a precision engineered pneumatic control relay designed for high performance HVAC automation and pneumatic logic circuits. Operating within a 3 to 20 psig set point range, this Barber Colman crossover component utilizes a snap acting SPDT switch mechanism to divert air signals between ports based on branch line pressure. When the signal pressure remains below the calibrated set point, the
US$ 26.99
US$ 21.99
US$ 98.00
