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Continue to ChatBurkert 783280 - DN40, G1 1/2, 30.9 Flow Rate KV, Brass, Heavy Design, Type TFU002 Check Valve For Water and Air https://www.process-valves.com/product/burkert-783280-dn40-g1-1-2-30-9-flow-rate-kv-brass-heavy-design-type-tfu002-check-valve-for-water-and-air/