Azbil KFLB User Manual
Azbil KFLB User Manual

Azbil KFLB User Manual

Liquid level detectors (meter bodies)
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OM2-5260-2100
Liquid Level Detectors
(Meter Bodies)
Model KFLB
User's Manual

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Summary of Contents for Azbil KFLB

  • Page 1 OM2-5260-2100 Liquid Level Detectors (Meter Bodies) Model KFLB User's Manual...
  • Page 2 In no event shall Azbil Corporation be liable to anyone for any indirect, special or consequential damages. This information and specifications in this document are subject to change without notice.
  • Page 3: Table Of Contents

    Table of Contents GENERAL Description Types of Meters Instructions for Instrument (Transmitter or Controller) to be Used in Conjunction Combination of Float, Bonnet, and Chamber STRUCTURE OF METER BODY Torque Tube Type General Operating Principles High Damping Type General Operating Principles INSTALLATION METHOD External Chamber Type Internal Chamber Type * .
  • Page 5: General

    The buoyancy is converted into torque by a torque tube an the torque force is applied to a pneumatic signal transmitter (Model KFLB) or to a controller (Model KFL). The meter body is directly coupled to the instrument. The detecting section is comprised of a meter body, a chamber, and a bonnet.
  • Page 6: Structure Of Meter Body

    STRUCTURE OF METER BODY 1. Torque Tube Type 1.1 General The structure of the torque tube assembly is as shown in Fig. 1. Fig 1 Structure of the Torque Tube Assembly 1.2 Operating Principles One end of the torque tube is fixed to the housing and the other end is coupled to a torque arm which is supported with a knife edge fulcrum.
  • Page 7: High Damping Type

    2. High Damping Type 2.1 General The structure of the meter body is as shown in Fig. 2. Fig 2 Structure of the Meter Body 2.2 Operating Principles As the liquid level rises, the upward buoyancy force exercised on the float increases. This force is fed via the float lever and diaphragm to the strap in the downward direction.
  • Page 8: Installation Method

    INSTALLATION METHOD 1. External Chamber Type The float chamber must be installed in such manner that, as the liquid level in the tank changes for the full measuring range, that in the float chamber also changes for the full measuring range. The connection method between the tank and the float chamber is as shown in Fig.
  • Page 9: Tightening Torques Of Chamber Flange Bolts

    3. Tightening Torques of Chamber Flange Bolts The sizes of bolts and the tightening torques of the bolts after replacing the gaskets with new ones should be as shown in the below table. When the flange and/or bonnet of a used instrument are removed by removing their bolts, their gaskets should be replaced with new ones.
  • Page 10: Dashpot Pin

    5. Dashpot Pin A pin is provided at the cap section of the dashpot of the transmitter beam in order to prevent leak of dashpot oil. When operating the instrument, remove the dashpot pin. 6. General Precautions Install the instrument to the process in the direction that the instrument is positioned vertically.
  • Page 11 Side Mount Type Top Mount Type Fig 4B Internal Float (Chamber) Type...
  • Page 13: Operation And Maintenance

    OPERATION AND MAINTENANCE 1. Operation For the preparative adjustments to be rendered before starting operating the liquid level transmitter, refer to the operator’s manual of the instrument. When feeding liquid into the chamber, gradually open the valve so that no abrupt change of pressure or liquid level (including flushing) is caused.
  • Page 16 Warranty period and warranty scope 1.1 Warranty period Azbil Corporation’s products shall be warranted for one (1) year from the date of your purchase of the said products or the delivery of the said products to a place designated by you.
  • Page 17 Although acceleration of the above situation varies depending on the conditions or environment of use of the products, you are required not to use any Azbil Corporation’s products for a period exceeding ten (10) years unless otherwise stated in specifications or instruction manuals.
  • Page 19 Document Number: OM2-5260-2100 Document Name: Liquid Level Detectors (Meter Bodies) Model KFLB User's Manual Date: 6th edition: Jan 2020 Issued/Edited by:...

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