QSS Quick Stem Sensor0 pages

Test Services
513 Mill Street • Marion, MA • 02738
Tel: 508-748-0103 Fax: 508-748-1093
www.valvetest.com
email: rwmasson@teledyne.com
BACKGROUND
Utilities operating nuclear power plants agree that the correct functioning of all motor operated valves, and particularly those in safety-related systems, is of paramount importance.
The Nuclear Regulatory Commission has issued Generic Letter 89-10 and other documents which relate to this concern. Operability must be demonstrated under design-basis conditions if practical. Described below is a patented transducer that improves on existing valve stem measurement transducers currently offered.
DESCRIPTION
The Teledyne Instruments - Test Services (TTS) Quick Stem Sensor (QSS) is a patented device that is applied to a valve stem using a layer of adhesive. Strain Gages, Circuitry and pre-wired connectors are included in the one-piece transducer.
After mounting and curing, the transducer can be used with or without calibration depending on accuracy requirements. For greater accuracy, the transducer is calibrated for torque and thrust using QUIKLOOK.
The TTS QSS makes possible an accurate nonintrusive measurement and greatly reduces installation time without compromising the quality of the measurement.
QSS
Quick Stem Sensor
© 2007 Teledyne Instruments Test Services All rights reserved.. 01/07LD
The ACCURACY STANDARD
in field-installed load sensors for motor operated
valve maintenance and diagnostics
THRUST and TORQUE
UNCALIBRATED: Within ±8.2% of reading
CALIBRATED: Within ±3.0% of reading