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Continue to ChatBurkert 783308 - DN20, R3/4, 8.6 Flow Rate KV, SS, Angle Seat Form, Type TFU002 Check Valve For Water and Air https://www.process-valves.com/product/burkert-783308-dn20-r3-4-8-6-flow-rate-kv-ss-angle-seat-form-type-tfu002-check-valve-for-water-and-air/