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Continue to ChatASCO E290A401 - G1, NC, DN25, Operator Diameter 50mm, Entry Above Disc, Series E290 Pressure Operated Piston Valve https://www.valves-direct.com/product/asco-e290a401-g1-nc-dn25-operator-diameter-50mm-entry-above-disc-series-e290-pressure-operated-piston-valve/