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Pressure Tech LF-301 SERIES Operating And Service Manual

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THE LF-301 SERIES
Operating and Service Manual
Series includes all variants of LF-301/311 and CYL-301/311
Issue B
January 2016
1

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Summary of Contents for Pressure Tech LF-301 SERIES

  • Page 1 THE LF-301 SERIES Operating and Service Manual Series includes all variants of LF-301/311 and CYL-301/311 Issue B January 2016...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS 1. Description ..........................3 2. Installation ..........................3 3. Operation ..........................4 4. Special Conditions for Safe Use ..................... 4 5. Hazardous Location Usage ..................... 4 6. Servicing and Maintenance ....................4 6.1. Servicing the LF-301 ....................5 6.1.1.

  • Page 3: Description

    Filtration suited to the application is recommended upstream of the regulator. Should further assistance or information be required in relation to installation of any Pressure Tech regulator please contact the office, giving reference to the regulators part number and/or serial number.

  • Page 4: Operation

    4. Special Conditions for Safe Use The LF-301 series are non-venting type regulators, therefore the outlet pressure shall be reduced by venting downstream of the regulator whilst simultaneously turning the adjusting mechanism anti-clockwise.

  • Page 5: Servicing The Lf-301

    To ensure the best possible results from servicing, when re-assembling the regulator and any assemblies within it, ensure that all areas of the components and the regulator body are cleaned and free from contaminants which may result in failure of the regulator. 6.1.

  • Page 6: Adjusting The Set Point

    6.1.2. Adjusting the Set Point It is not recommended (or necessary) to remove the Hand Wheel during service as this will affect the set point of the regulator. Should it be required to adjust the set point please follow the instructions below: Remove the Nameplate (22) and Cap from the Hand Wheel (23) and loosen the Lock Nut (12) such that the Hand Wheel is able to spin freely on the Adjusting Screw (11)

  • Page 7: Figure 1 – Sectional View Of The Lf-301

    PTFE BACK UP RING OR-BS008 O-RING STD OR-0171-16 O-RING STD OR-0190-20 O-RING STD OR-0050-10 O-RING STD CIR-BS3673/1-B010M CIRCLIP FILT-SCRM31040405-A 10mm SCREEN FILTER PT-C-002-XXX SOFT SEAT PT-C-022 NAMEPLATE PT-C-021 SMALL HAND WHEEL PT-C-011-XXX LOAD SPRING © Copyright of Pressure Tech Ltd...

  • Page 8: Technical Data

    *Max Inlet Pressure determined by seat material and Cv of regulator. 8. Warranty Statement Pressure Tech Ltd guarantee all products correspond with their specification at the time of delivery and, with exception to wear and tear, wilful damage, negligence, and abnormal working conditions, will be free from defects for a period of 12 months from date of delivery.

  • Page 9: Annex A. Lf-310/311 - 'Solid Disk' Main Valve Design

    Annex A. LF-310/311 – ‘Solid Disk’ Main Valve Design A.1. Description The ‘solid disk’ type main valve assembly was introduced as an alternative to the unique ‘cone type’ assembly and could be applied where greater resistance to both temperature and pressure were required. The new disk design allows for a wider range of seat material options as well as increased Cv and Pressure combinations.

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