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Continue to ChatASCO CFVTG551C502MO - 3/2 NC, Bi-Stable, Return, G1/4, Series 551 552 553 - Pilot Operated NAMUR Spool Valves https://www.valves-direct.com/product/asco-cfvtg551c502mo-3-2-nc-bi-stable-return-g1-4-series-551-552-553-pilot-operated-namur-spool-valves/