JFD Divex SLS Mk IV, Operation And Maintenance Manual

Page: 84 / 136

72 OM131
Chapter 4 P1939-OM-131 R11
4.3.4.3 Strip down and service of single stage regulator
1. Ensure that the gas cylinders are empty by activating the SLS System and pressing down on
the demand valve diaphragm with the demand valve activating tool (Divex Part No. M2922)
from the Tool and Test Kit.
2. Disconnect the pipework from the SLS System main supply penetrator.
3. Disconnect the supply pipework, from the gas cylinders at the regulator inlet banjo.
4. Remove the single stage regulator and two stage regulator complete with the interconnecting
pipework and withdraw to the extent that the retaining screws for the actuating sleeve can be
reached.
5. Remove screws from actuating sleeve block.
N
OTE
The screws securing the mounting plate to the regulator body should not be touched as they are
secured by Loctite 601.
6. Remove the banjo mounting bolt (Fig 4.8, Item 10) from the regulator.
7. Undo the bracket and withdraw the single stage regulator from the SLS System.
8. Disconnect the flexible gas supply hose at the regulator inlet port.
9. Remove the regulator from the SLS System.
10. Unscrew the end cap (Fig 4.8, Item 2) and remove the spring adjustment plate (Fig 4.8, Item
5) the spring support plate (Fig 4.8, Item 4) and the spring (Fig 4.8, Item 14).
11. Remove the slip ring (Fig 4.8, Item 11) the diaphragm (Fig 4.8, Item 20) and the diaphragm
support plate (Fig 4.8, Item 3).
12. Unscrew and remove the valve seat retainer (Fig 4.8, Item 6) and valve seat (Fig 4.8, Item 7).
13. Lift out the valve pin (Fig 4.8, Item 8).
14. Remove the spring (Fig 4.8, Item 15).
15. Check the valve seat (Fig 4.8, Item 7) for wear and replace as necessary.
33 Grub Screw FB079
34 Gasket VM052
35 Relief Valve PO20640
36 Ball Bearing RK231
37 Mounting Plate D29010
38 Spring RK223
39 Spring RK235
40 Mesh D32870
Item Description Part No