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What does 'normally closed' mean for this solenoid
System Efficiency: Prevents vacuum loss at the collector box
Directional Security: The eccentric locking mechanism ensures the bearing remains fixed during standard rotation
it is a cross-reference match for various Armstrong and Ducane models using identical 24" 4-blade configurations
If the sensor reports an incorrect resistance value
Siemens Building Technology 599-01117 Valve 322057-301 What does 'normally closed' meanThe Siemens 599 01117 is a precision engineered 1 2 inch NPT globe valve designed for demanding HVAC applications requiring high accuracy flow control. This 2 way normally open valve features a 0. 63 Cv equal percentage flow characteristic, making it an ideal choice for chilled water, hot water, and up to 50% glycol solutions. Built with a rugged forged brass body and durable brass trim, the 599 01117 ensures long term reliability in terminal unit
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