Designed for burner-boiler applications, Asco Series 158 gas valve and Series 159 motorized actuator serve as a combustion safety shutoff valve option that enhances flow and control, says the manufacturer. The valve offers a higher close-off pressure of 75 psi (5.2 bar) to ensure a safe shutoff in the event of a fuel-train system failure. Also, it eliminates the need for additional safety components. The gas valve is available in sizes from 0.75 to 3" NPT (DN 10 to DN 80) in both single and monoblock constructions. The actuator can mount in any position and offers a visual indication of opening. This safety shutoff valve is rated for an ambient temperature range of -40 to 150°F (-40 to 66°C).

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