Emerson A6410 Dual-channel Valve and Case Expansion Monitor

This 1-slot monitor is used together with other AMS 6500 monitors to build a complete API 670 machinery protection monitor. $2,000.00

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Description

Emerson A6410

The Valve and Case Expansion Monitor is designed for high reliability for the plant’s most critical rotating machinery. This 1-slot monitor is used together with other AMS 6500 monitors to build a complete API 670 machinery protection monitor. Applications include steam, gas, compressors and hydro turbo machinery.

The main functionality of the Valve and Case Expansion Monitor is to accurately monitor valve position and case expansion and reliably protect machinery by comparing parameters against alarm set points, driving alarms and relays.

Valve position is a measurement of the main steam inlet valve stem position normally displayed in percent open. The valve position measurement provides the operator with an indication of the current load on the turbine.

Case expansion monitoring usually consists of two inductive displacement sensor (or LVDT’s) mounted in the axial direction, parallel to the shaft, and on each side of the turbine case. Unlike the eddy current sensor which is a non-contact sensor, the inductive sensor is a contact sensor.

Case expansion monitoring is important at start-up, so both sides of the turbine case can be monitored for proper expansion rates. Because the turbine is allowed to slide on rails as it expands, if both sides are not free to expand, the turbine “crabs” (the case bends), leading to the rotor colliding with the case.

Channel 1 can measure static values, such as case expansion, and can also be used for dynamic quantities, such as displacement, angles, forces, torsions or other physical quantities measured by inductive transducers. Channel 2 is left for static measurements and relative displacements (relative to channel 1).

Emerson A6410

Technical Specifications

Part Number	A6410
Ordering Information	A6410
Product Catalog	CSI 6500
Description	Dual-channel Valve and Case Expansion Monitor
Inputs	3.6 VDC
Outputs	Max. 6 W, 250 mA at 24 VDC
Dimension	30.0 mm × 128.4 mm × 160.0 mm
Weight	320 g