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Continue to ChatASCO SCE353A831.24/DC - G1 1/2, Orifice Size 40mm, Threaded, Series 353 Dust Collector Power Pulse Valves https://www.valves-direct.com/product/asco-sce353a831-24-dc-g1-1-2-orifice-size-40mm-threaded-series-353-dust-collector-power-pulse-valves/