Sporlan 470070 Accumulator 321894-709 The McDonnell & Miller 51-2

The McDonnell & Miller 51-2 (Part Number 135000) is a heavy-duty mechanical water feeder and low water cut-off (LWCO) designed for industrial and commercial low pressure steam and hot water boilers

allowing technicians to switch seamlessly between "spray" (ambient comfort) and "dry" (high-heat curing) cycles using an external SPST switch

with a spring return closing time of roughly 9 seconds

it features internal line break protection to shut down the motor in the event of excessive temperature or overcurrent situations

Simplified Installation: The 1/2-inch back mount connection facilitates a direct threaded fit into standard tapping points without specialized adapters

Sporlan 470070 Accumulator 321894-709 The McDonnell & Miller 51-2The Sporlan 470070, specifically model VPA5812 7SRD, is a high performance suction line accumulator engineered for reliable compressor protection in demanding refrigeration and heat pump applications. Designed with a 7 8" ODF sweat connection, this vertical vessel effectively captures excess liquid refrigerant and lubricant before they can reach the compressor, preventing catastrophic liquid slugging. The unit features a sophisticated "U" tube design