We Offering Siemens Servo Motors SQN 72.2A4A20.The Siemens actuator SQN-72.2A4A20 is controlled by the LME22 series burner controls, which are installed as part of the burner control system and allow changing the ratio of gas and air during the formation of an air-fuel mixture during the operation of the burner. Siemens SQN 72.2??4??20 servo drives have technological holes for mounting and for connecting power supply.The Siemens SQN 72.2A4A20 servomotor allows you to change the operating angle of the burner air or fuel damper opening from 0 to 90 degrees.