1 api lists as obsolete but still used in the valve industry. These api 6a gate valves meet all of the industry standards for quality and safety. Api trim number material backseat stem notes 1 410 410 410 410 410 2 304 304 304 304 304 3 f310 310 310 310 310 4 hard 410 hard 410 hard 410 410 410 seats 750 bhn min.
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