Elster J48HL Quick Start Manual Download Page 7

 

Dismantling Procedure (continued): 

14.  Remove the spring location washer (22). 
15.  Remove top diaphragm plate (23). 
16.  Carefully remove main diaphragm (9). 
17.  Remove diaphragm spacer (24). 
18.  Withdraw the valve spindle (2) through the bottom plug opening in body (3). 
19.  Remove "O" ring seal (30) from the valve spindle (2). 
20. Withdraw valve disc holder (4) complete with valve disc (5) through bottom plug opening in body (3). 
21.  Unscrew the secondary diaphragm screws (25) then lift off the secondary diaphragm assembly (8), (26), (27) 

& (28) through the top of the body (3). 

22. Remove valve spacer (6) from secondary diaphragm assembly. 
23. Remove secondary diaphragm mounting plate gasket (7). 
24. Unscrew secondary diaphragm clamping plate screws (28). 
25. Remove secondary diaphragm clamping plate (8). 
26. Carefully remove the secondary diaphragm (27). 
27.  Check that hole in impulse tube (29) is clear. DO NOT REMOVE FROM BODY. 
28. Wipe valve seat and body clean of any dirt particles, taking care not to damage sealing surface in body. 
29. Inspect all diaphragms and soft seals and replace where necessary (a spares kit is available for this 

purpose). 

Rebuilding procedure: 

Note: Inspect all sealing 'O' rings, diaphragms, valves discs, gaskets and replace where necessary (a soft 
spares kit is available for this purpose). 
The use of Molykote 111 "O" ring lubricant is recommended during the rebuild- unless for use with oxygen when 
no lubricant should be used. 
1.

 

Replace "O" ring seal (30) over threaded end of valve spindle (2) until it rests against shoulder of spindle. 

2.

 

Assemble valve disc (5) onto valve disc holder (4) with bead uppermost. 

3.

 

Replace valve disc assembly (4) & (5) over threaded end of valve spindle (2) with chamfer around centre 
facing downward. 

4.

 

Load valve spindle assembly (2) through bottom plug opening in body (3). This will ease assembly of valve 
spacer (6) and secondary diaphragm. 

5.

 

Replace bottom plug (1) in bottom aperture of body ensuring that valve spindle assembly (2) is located correctly.

6.

 

Load the valve spacer (6) through the top of the body (counter bore upwards) onto the valve spindle 
assembly (2). 

7.

 

Place the secondary diaphragm (27) on top of the secondary diaphragm clamping plate (8) with the internal 
radii on the secondary diaphragm clamping plate (8) facing upward. Ensure the holes in each component 
line up correctly.  

8.

 

Place the secondary diaphragm mounting plate (26), with counterbore facing downward, onto the 
secondary diaphragm (27) and secondary diaphragm clamping plate (8). Ensure the holes in each 
component line up correctly. 

9.

 

Secure secondary diaphragm mounting plate (26) to the secondary diaphragm (27) and secondary 
diaphragm clamping plate (8) using screws (28) and tighten. 

10.

 

Place secondary diaphragm mounting plate gasket (7) in position on top of flange in body (3). 

11.

 

With heads of screws (28) on underside, place the secondary diaphragm assembly over valve spindle (2), 
ensure the secondary diaphragm fits into the counterbore of the valve spacer (6). Orientate the secondary 
diaphragm assembly so that the holes for screws (25) and impulse tube (29) are in line. 

J48HL: Maintenance Instructions 

Summary of Contents for J48HL

Page 1: ...J48HL Gas Pressure Regulator Commissioning Instructions General Arrangement Parts List Maintenance Instructions For J48HL Regulator 2 This product is discontinued ...

Page 2: ...a flat bladed screwdriver into the slot in the end of the spring adjusting screw 18 Turn anticlockwise to reduce pressure on the loading spring 19 Slowly turn on inlet supply 20 Increase loading on the spring by turning the spring adjusting screw clockwise until the required outlet pressure plus approximately 2 5mbar is obtained 21 Commission downstream appliance s 22 Trim the outlet pressure of t...

Page 3: ...3 J48HL Regulator General Arrangement 20 19 21 Spring Adjustment Pre October 2000 1 5 4 3 2 6 10 9 8 7 14 44 11 13 12 15 16 31 30 27 28 29 26 25 22 23 24 47 46 18 45 43 17 ...

Page 4: ...806 105 1 J4806 105 1 18 O RING SEAL JO200032 4475 Ï 1 JO200032 4475 Ï 1 19 ADJUSTING BUSH Old Design J4806 100 1 J4806 100 1 20 TOP SPRING HOLDER Course Thread J4806 098 1 J4806 098 1 21 SPRING ADJUSTING SCREW Course Thread J4806 097 1 J4806 097 1 22 SPRING LOCATION WASHER J4806 057 1 J4806 057 1 23 TOP DIAPHRAGM PLATE J4806 055 1 J4806 055 1 24 DIAPHRAGM SPACER J4806 052 1 J4806 052 1 25 SCREW J...

Page 5: ... Ï 1 JO200032 4475 Ï 1 JO200032 4475 Ï 1 19 ADJUSTING BUSH Old Design J4806 100 1 J4806 100 1 J4806 100 1 20 TOP SPRING HOLDER Course Thread J4806 098 1 J4806 098 1 J4806 098 1 21 SPRING ADJUSTING SCREW Course Thread J4806 097 1 J4806 097 1 J4806 097 1 22 SPRING LOCATION WASHER J9812 022 1 J9812 022 1 J4809 053 1 23 TOP DIAPHRAGM PLATE J9812 024 1 J9812 024 1 J4809 051 1 24 DIAPHRAGM SPACER J4808 ...

Page 6: ...ocking lever 17 just above adjusting bush 45 whilst in this position turn octagon shaped adjusting bush assembly 19 anticlockwise until disengaged The adjusting bush 45 can then be removed from the top cover 14 4 Remove the loading spring 13 from the top cover 14 5 Lift keyhole end of locking lever 17 over sloping peg in adjusting bush 45 and slide forward until disengaged from spring adjusting sc...

Page 7: ...over threaded end of valve spindle 2 until it rests against shoulder of spindle 2 Assemble valve disc 5 onto valve disc holder 4 with bead uppermost 3 Replace valve disc assembly 4 5 over threaded end of valve spindle 2 with chamfer around centre facing downward 4 Load valve spindle assembly 2 through bottom plug opening in body 3 This will ease assembly of valve spacer 6 and secondary diaphragm 5...

Page 8: ... spring location washer 22 NOTE If adjusting bush assembly 45 has been dismantled follow procedure if it has been left assembled then proceed to instruction number 26 22 Slide O ring seal 15 over slotted end of spring adjusting screw 46 into second groove i e groove nearest thread 23 Replace washer 44 over slotted end of spring adjusting screw 46 and slide down until it sits on shoulder of adjusti...

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