Pressure Tech LF-540 Series Operating And Service Manual Download Page 1 | Manualshive

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THE LF-540 SERIES

Operating and Service Manual

Series includes all variants of LF-540

Issue B
July 2016

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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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