Siemens Combustion SQN71.603R19 Actuator 320788-704 the unit must be calibrated

the unit must be calibrated in its mounting plane (horizontal or vertical) to ensure the differential pressure sensor maintains 0-1 inch wc sensitivity

ensuring a precise fit that generic alternatives often fail to provide

Field Reliability: The A19ABC-44 provides consistent automatic reset operation without the need for manual intervention after a temperature excursion

scoring at the bearing contact points

Designed for high-pressure performance

Siemens Combustion SQN71.603R19 Actuator 320788-704 the unit must be calibratedThe Siemens Combustion SQN71. 603R19 Actuator is a precision engineered 120Vac reversing actuator designed for the reliable positioning of air and gas dampers in burner applications. This electromotoric actuator features a high performance synchronous motor that drives a shaft and switch cam drum, providing exceptional control for two stage or three stage systems. With a running time of 25 seconds for 90 rotation at 60 Hz and a rated torque of 22 lb