The certas valve was returned for evaluation.Failure analysis: the position of the cam when valve was received was at setting 5.The valve was visually inspected a bump mark was noted in the valve upper casing and the rotation construct was stuck in the up position.The valve failed programming test.Root cause analysis: the root cause for the bump mark and cracks in the top of the valve casing, the rotating construct stuck in the upper position, and programming issue is due to the valve receiving a hard knock.
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