3500/53M [caption id="attachment_2097" align="aligncenter" width="600"] 3500/53M[/caption] The 3500 Series Bently Nevada* Electronic Overspeed Detection System The mechanical detection system provides a highly reliable, fast responsive, redundant tachometer system protection system dedicated to the overspeed section. It is designed to meet the requirements of the American Petroleum Institute (API) regarding overspeed standards 670 and 612 protection.
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