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The integrated manual lift stem provides essential manual override capabilities
The dual-flow internal check valve assembly ensures that when the system reverses
This heavy-duty 10-inch adapter is constructed from durable cast iron
also identified by model number CO-12
Dwyer Instruments 1640-0 Switch 323613-751 The integrated manual lift stemThe Dwyer Instruments 1640 0 Switch is a high precision differential pressure switch engineered for specialized HVACR applications requiring floating contact null switch logic. Unlike standard snap acting switches, the 1640 series utilizes a single pole double throw (SPDT) floating contact design to provide two distinct actuation pointshigh and lowwith a defined "null" zone in between. This makes it an ideal solution for motorized damper control and
