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Motorized actuator and shutoff valve for combustion systems

| By Gerald Ondrey

The ASCO Series 148/149 safety valve and motorized actuator (photo) is designed for industrial fuel-oil burner recirculation and safety shutoff applications. The new device prevents overpressure, leaks and system malfunctions that can lead to health and safety incidents, with one configuration suited to a wide range of combustion-system applications. The combination is a compact two- and three-way system with a motorized actuator that achieves rapid, reliable fuel-line shutoff from an open to closed position in less than one second. It is engineered for robust and reliable operation in harsh outdoor environments, supporting an operating range from –40 to 66°C. — Emerson, St. Louis, Mo.