Pressure Tech LF-540 Series Operating And Service Manual Download Page 8


 

6.1.5. Figure 1 – Sectional View of the LF-540 – Self Venting 

 

 

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PARTS LIST 

ITEM 

PART NUMBER 

DESCRIPTION 

ORB-PT-C-178 

PTFE BACK UP 

PT-C-132 

LOCK NUT 

ORB-PT-C-052 

PTFE BACK UP 

PT-C-049 

NAMEPLATE 

PT-C-048-001 

LARGE HAND WHEEL 

PT-C-046 

SLOT SCREW 

PT-C-045 

ADJUSTING NUT 

PT-C-043-004 

ADJUSTING SCREW 

PT-C-042 

LOAD SPRING (500KG) 

10 

PT-C-040-002 

BONNET 

11 

PT-C-039 

SPRING REST 

12 

PT-C-038 

SLIDE RING 

13 

PT-C-036 

VENT SEAT 

14 

PT-C-035 

25MM SENSOR 

15 

PT-C-033-003 

SENSOR HOLDER 

16 

PT-C-031 

MAIN VALVE SPRING 

17 

PT-C-030 

MAIN VALVE 

18 

PT-C-029 

PEEK SEAT Cv 0.2 

19 

PT-550-009 

RETAINING WIRE CLIP 

20 

PT-550-008-001 

CONNECTOR PIN 

21 

PT-550-006 

SEAT NUT 

22 

PT-540-A-LF 

BODY ‘A’ PORTING 

23 

OR-0360-20 

O’RING STD 

24 

OR-0250-20 

O’RING STD 

25 

OR-0050-10 

O’RING STD 

26 

FIT-M3x4MM-SS-316-GRUBSCRW 

M3 GRUB SCREW 

27 

FIT-M3-08-A4-70.0-SKT-BTN 

M3 BUTTON SCREW 

28 

FILT-SCRM31040405-A 

10MM SCREEN FILTER 

29 

FIT-472011-SS-CIRCLIP 

11MM CIRCLIP 

30 

BEAR-51103-SS 

SS BEARING 

Summary of Contents for LF-540 Series

Page 1: ...1 THE LF 540 SERIES Operating and Service Manual Series includes all variants of LF 540 Issue B July 2016...

Page 2: ...Usage 4 6 Servicing and Maintenance 4 6 1 Servicing the LF 540 Cv 0 2 Self Venting 4 6 1 1 Accessing the Main Valve Assembly 5 6 1 2 Accessing the Vent Seat 5 6 1 3 Reassembly Sensor Assembly 6 6 1 4...

Page 3: ...available on this regulator Use the correct dowty or bonded seal for BSPP connections self centering seals are recommended For NPT threads ensure that PTFE tape is applied correctly to the fittings ap...

Page 4: ...exhausts to atmosphere 4 Special Conditions for Safe Use Turning the hand wheel anti clockwise with pressure on the outlet should be refrained on non venting regulators Pressure should be reduced in...

Page 5: ...and tap the base to remove these parts NOTE Cv 0 1 and Cv 0 3 models will contain a 9x1mm o ring not shown below the soft seat x Inspect the main valve 17 and soft seat 18 for damage and replace as re...

Page 6: ...sensor holder v Screw the spring rest 11 into the sensor 14 vi The assembly can be secured by gripping the flats of the spring rest 11 in a vice and using a slotted screwdriver to tighten the sensor 1...

Page 7: ...ighten the seat nut 21 securely to compress the soft seat 18 vii The sensor assembly may then be placed into the regulator body 22 viii Place the load spring 9 onto the spring rest 11 and locate the a...

Page 8: ...PT C 039 SPRING REST 12 PT C 038 SLIDE RING 13 PT C 036 VENT SEAT 14 PT C 035 25MM SENSOR 15 PT C 033 003 SENSOR HOLDER 16 PT C 031 MAIN VALVE SPRING 17 PT C 030 MAIN VALVE 18 PT C 029 PEEK SEAT Cv 0...

Page 9: ...K Ceramic Flow Capacity Cv 0 1 0 2 0 3 Leakage Gas Bubble tight Liquid Zero drops of water at max inlet Max Inlet Pressure determined by seat material and Cv of regulator 8 Warranty Statement Pressure...

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