ensuring sequence-controlled ventilation via fixed 15-second pre-purge and 30-second post-purge cycles

The switch opens when head pressure drops to 300 PSIG (stopping the fan) and will automatically close once the pressure rises back to 400 PSIG (restarting the fan)

What brands does this ICP part fit

providing a significant safety margin in high-temperature environments

Dwyer Instruments 123-7000-153 Control R-448A ensuring sequence-controlled ventilation via fixedThe Dwyer Instruments 123 7000 153 is a heavy duty boiler water level control designed for demanding steam plant environments. Built with a rugged cast iron chamber, this unit serves as a critical low water cut off or feed water control for high pressure systems. It features a reliable SPDT snap action switch mechanism that stabilizes operation by eliminating rapid cycling caused by surging or turbulent water levels. Housed in a general purpose