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Continue to ChatBurkert 783305 - DN8, R1/4, 3.7 Flow Rate KV, SS, Angle Seat Form, Type TFU002 Check Valve For Water and Air https://www.process-valves.com/product/burkert-783305-dn8-r1-4-3-7-flow-rate-kv-ss-angle-seat-form-type-tfu002-check-valve-for-water-and-air/