A Multiplex 00219328 Pressure Switch monitors low-water pressure to maintain proper system response and protect the equipment from dry-running.
The pressure switch monitors water pressure in the blast chiller and triggers a response when pressure drops below the set threshold, protecting the system from operating under low-water conditions. Its 4 PSI calibration and low-water switching design matter because they provide consistent detection at the required point, supporting reliable operation and reducing the risk of damage tied to insufficient water flow.
The pressure switch may be failing if the blast chiller shuts down unexpectedly, shows low-water fault conditions or runs inconsistently even when water supply appears normal. Physical signs can include cracking, corrosion or damaged terminals and environmental signs may include moisture intrusion, scale buildup or residue around the switch housing and connections.
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