Combines capabilities of both diaphragm and solenoid dumping fuel units. Cut on/cut off speed controlled by cone valve diaphragm valve circuit. Cut on/cut off speed controlled by solenoid dumping circuit.
Suitable for use with a standard primary control, or a pre-purge/post-purge primary control.
Normal cut on with a pre-purge primary control is 3450 rpm.
Normal cut off with or without a post-purge primary control is 3450 rpm.
The diaphragm valve insures cutoff at burner shut down.
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