Spence Engineering D550 Pilot Els PW 29614 The housing includes molded terminal

The housing includes molded terminal numbers and a circuit diagram on top for rapid wiring identification and diagnostic troubleshooting

this transducer is a professional-grade solution for technicians managing complex HVAC differential pressure applications

This part number typically refers to the controller itself

and a retainer

a 40VA transformer can replace a 30VA or 20VA unit as long as the primary and secondary voltages match

Spence Engineering D550 Pilot Els PW 29614 The housing includes molded terminalThe Spence Engineering D550 Pilot is a heavy duty, spring operated pressure pilot designed to interface with Type E and Type C main valves for high accuracy steam regulation. Constructed with a rugged cast iron body, this normally closed pilot is specifically engineered for secondary pressure control in steam heating systems and industrial vapor applications. It features a 5 50 PSI spring range, allowing contractors to field adjust delivery setpoints