On board power supply

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The part number for the solenoid air valve in the 7900 Series control boxes are: 7901/ES7901 - part# 941 - marked A 7902(S)/ES7902(S) - part# 942 - (2 valves) marked A and B 7949/ES7949 - part...
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ElectroMechanical Automatic Operators are designed to automatically open when activated. The Benchmark Series are Medium Duty "Commercial" automatic operators, often used on of...