Bently Nevada 991-10-XX-02-00 (163930-01) Thrust Transmitter: Compact Axial Position Protection for Balance-of-Plant Rotating Machinery

Description

Application Scenarios

A centrifugal air compressor OEM is assembling a skid-mounted package for a petrochemical customer. The customer’s control philosophy relies on a plant-wide DCS rather than a dedicated machinery protection rack, but the compressor’s fluid-film thrust bearing still demands continuous axial position monitoring. Installing a full 3500 system would add cost, panel space, and integration effort disproportionate to the machine’s criticality classification. The Bently Nevada 991-10-XX-02-00 solves this mismatch: a single 3300 NSv probe feeds the transmitter, which outputs a 4–20 mA signal proportional to thrust position directly into the DCS analog input card. The transmitter’s integrated Proximitor design means no external前置器 is needed, and its potted construction withstands the 100% condensing humidity common in coastal petrochemical installations. When a probe cable loosens or fails, the Not OK/Signal Defeat circuit drives the output below 3.6 mA within 100 microseconds—ensuring the DCS sees a diagnostic state rather than a false high thrust reading that could trigger an unnecessary trip.

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