
SD74
2
TABLE OF CONTENTS
SECTION AND TITLE PAGE
1.0 INTRODUCTION.................................................................................................................................................4
1.1 MODEL DESIGNATION...................................................................................................................................4
1.2 SPECIFICATIONS .............................................................................................................................................4
1.3 ORDERING RANGE AND SUPPRESSION SPRING KITS............................................................................5
1.4 CUSTOMER/PRODUCT SUPPORT .................................................................................................................7
2.0 INSTALLATION ..................................................................................................................................................8
2.1 PNEUMATIC CONNECTIONS.........................................................................................................................8
2.2 INSTRUMENT AIR REQUIREMENTS............................................................................................................8
2.3 VALVE POSITIONER .......................................................................................................................................9
2.4 MOTION TRANSMITTER ................................................................................................................................9
2.5 RANGE AND SUPPRESSION SPRING KITS ...............................................................................................12
2.5.1 Rectilinear Range Spring Kit......................................................................................................................12
2.5.2 Rotary Range Spring Kit ............................................................................................................................12
2.5.3 Suppression Spring Kit...............................................................................................................................14
3.0 CALIBRATION ..................................................................................................................................................15
3.1 VALVE POSITIONER .....................................................................................................................................15
3.1.1 Rectilinear Range Spring............................................................................................................................15
3.1.2 Rotary Range Spring ..................................................................................................................................15
3.2 OUTPUT PRESSURE LEVEL ADJUSTMENT..............................................................................................15
3.3 MOTION TRANSMITTER ..............................................................................................................................16
4.0 OPERATION.......................................................................................................................................................17
4.1 VALVE POSITIONER .....................................................................................................................................17
4.2 MOTION TRANSMITTER ..............................................................................................................................18
5.0 MAINTENANCE ................................................................................................................................................19
5.1 DISASSEMBLY ...............................................................................................................................................21
5.2 ASSEMBLY......................................................................................................................................................22
5.3 PREVENTIVE ..................................................................................................................................................22
6.0 PARTS LIST........................................................................................................................................................23
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