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Continue to ChatASCO S290B139 - 2/2 NC, DN20, Stainless Steel Body, PTFE Seal, Clamp Connection, Series S290 - ASCO Pressure Operated Valves https://www.valves-direct.com/product/asco-s290b139-2-2-nc-dn20-stainless-steel-body-ptfe-seal-clamp-connection-series-s290-asco-pressure-operated-valves/