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Continue to ChatASCO SCDUG353A065 - G1 1/2, Orifice Size 52mm, Compression Fitting, ATEX, NBR Seal, Series 353 ASCO Dust Collector Dual Pulse Valves https://www.valves-direct.com/product/asco-scdug353a065-g1-1-2-orifice-size-52mm-compression-fitting-atex-nbr-seal-series-353-asco-dust-collector-dual-pulse-valves/