Table of Contents
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1. Description ............................................................................................................................. 3
2. Installation ............................................................................................................................. 3
3. Operation ............................................................................................................................... 4
4. Special Conditions for Safe Use ............................................................................................. 5
5. Hazardous Location Usage ..................................................................................................... 5
6. Servicing and Maintenance .................................................................................................... 5
6.1. Servicing the LF-690 regulator ................................................................................ 6
6.1.1. Accessing the Unbalanced Main Valve Assembly (MVA) .................................... 6
6.1.2. Accessing the Domed Sensor Assembly (SA) ...................................................... 7
6.1.3. Figure 1 - Sectional View of the LF-690 (with Domed SA/Unbalanced MVA) .... 8
6.2. Servicing the LF-690 Balanced Regulator ............................................................... 9
6.2.1. Accessing the Balanced Main Valve Assembly (MVA) ........................................ 9
6.2.2. Figure 2 - Sectional View of the LF-690 Balanced MVA ................................... 10
6.2.3. Accessing the Threaded Sensor Assembly ........................................................ 11
6.2.4. Figure 3 - Sectional View of the LF-690 (with Threaded SA/Balanced MVA) ... 12
6.3. Servicing the LF-691 regulator .............................................................................. 13
6.3.1. Accessing the Main Valve Assembly ................................................................. 13
6.3.2. Accessing the Sensor Assembly ........................................................................ 14
6.3.3. Figure 4 - Sectional View of the LF-691 (Long TW) .......................................... 15
7. Technical Data ......................................................................................................... 16
8. Warranty Statement ............................................................................................................ 16
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TABLE OF CONTENTS
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Table of Contents
