Azbil KDP Series User Manual
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Azbil KDP Series User Manual

Azbil KDP Series User Manual

Differential pressure detectors
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OM2-5220-1100
Differential Pressure Detectors
(Meter Bodies)
Model KDP/KFDB
User's Manual

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Summary of Contents for Azbil KDP Series

  • Page 1 OM2-5220-1100 Differential Pressure Detectors (Meter Bodies) Model KDP/KFDB 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 Chapter 1. DESCRIPTION ............1 1-1.

  • Page 5: Chapter 1. Description

    Chapter 1. DESCRIPTION 1-1. GENERAL The differential pressure detector (meter body) accepts a differential pressure through its high and low pressure connection ports, converts the differential pressure into a torque force by its center section to which the high and low pressures are applied through respective diaphragms, and feeds a torque via its torque tube to a pneumatic transmitter (Model KDP) or a pneumatic controller (Model KFDB).

  • Page 6: Chapter 2. Structures Of Meter Bodies

    Chapter 2. STRUCTURES OF METER BODIES 2-1. EXTERNAL VIEWS Although external views of meter bodies differ by models as shown in Fig. 2-1, the bracket mounting section and instrument connection section are identical for models 11/22, 71/72, and for models 33/44, 81/82. Fig.

  • Page 7: Structures And Operating Principles

    2-2. STRUCTURES AND OPERATING PRINCIPLES The structures and operating principles of the meter bodies are covered in this section. 2-2-1. Models 11/12, 33, and 81/82 (a) The high and low process pressures (HP and LP) are fed via diaphragms (1) and (2) to the center section (oil filled section) of the meter body.
  • Page 8 2-2-2. Model 44 (a) The high and low process pressures (HP and LP) are fed via the diaphragms and supports (1) to the center section (silicone filled section) (2) of the meter body. The HP acts on the pressure detecting diaphragm from the right hand side and the LP from the left hand side.
  • Page 9 2-2-3. Models 61/62 (a) The high and low process pressures (HP and LP) are fed via diaphragms (2) and (11) to the center section (silicone filled section) of the meter body. A pressure which is proportional to the liquid head in the process vessel is fed via the seal diaphragm (2) and liquid fill to the bellows (5) at the center section of the meter body.
  • Page 10 2-2-4. Models 71/72 (a) The high and low process pressures (HP and LP) are fed via diaphragms (2) to the center section (silicone filled section) (11) of the meter body. The HP is fed via the seal diaphragm (2) and liquid fill (4) to the bellows (5) at the center section of the meter body. The LP is fed bia the seal diaphragm (2) and liquid fill (10) to the bellows (5).

  • Page 11: Chapter 3. Installation

    Chapter 3. INSTALLATION 3-1. GENERAL The meter body (detector), together with the instrument (transmitter) coupled to it, can be installed on a 50 mm pipe stanchion by using the accessory bracket and U-shape bolt. Model 61/62 meter body can be installed simply by fixing its flange to the process. 3-2.

  • Page 12: Installation Method

    3-4. INSTALLATION METHOD Install the meter body in such attitude that its diaphragm or bellows planes are made vertical. 3-4-1. Installation of Regular-type Meter Body The meter body, together with the transmitter coupled to it, can be installed in either one of the following methods: •...
  • Page 13 3-4-2. Installation of Model 61/62/71/72 Connect the detector flange to a process flange*. Tighten the bolts uniformly. The center of the flange represents the zero point of the liquid level. (See Fig. 3-5) If the zero point is raised, the head increases by a corresponding amount.

  • Page 14: Pressure Piping

    Fig. 3-5. Zero Point of Diaphragm Note: For the portion from the minimum liquid level (0 % level) to a height of 25 mm, the output is not linearly proportional to the liquid level. 3-5. PRESSURE PIPING 3-5-1. Models 11/22/33/44/81/82 (1) Piping method (tapping pressure connection method) may differ depending on the installation position of the instrument and the conditions of the process pipe line.
  • Page 15 (2) When in flow measurement and the meter body is installed lower than the pipe line, it is recommended to provide blow pipes. Fig. 3-7. Blow Piping (3) For the pressure connection piping from the pressure tap position to the transmitter, provide a gradient so that drain is returned through the tapping position to the process line.
  • Page 16 Fig. 3-8. Pressure Piping for Flow Measurement (6) To change connections to process: If it is required to change process connections (vent and drain) between upper and lower positions, remove the two flanges of the connection ports and also the plugs of vent and drain, and change the positions between upper and lower.
  • Page 17 Fig. 3-9. Connections of Pressure Pipes for Liquid Level Measurement The liquid level corresponding to the difference between the 0 % level and the center of the meter body is given from the beginning. In the case of A or B shown in Fig. 3-9, make compensation (provide an elevation) for the corresponding amount and set the output at 0.2 to 1.0 kgf/cm for liquid level 0 to 100 %.
  • Page 18 Fig. 3-11. Process Connections of Model 71/72 for Liquid Level Measurement Fig. 3-12. Pressure Tapping for Model 71/72 for Flow Measurement (1) Fix the flanges of the meter body to those of the process side by using gaskets and bolts. Be sure to uniformly and securely tighten the bolts in order to prevent leak.

  • Page 19: Elevation And Suppression

    (2) Regarding the flange of the low pressure side when in level measurement of an open tank, fix it securely at a position where it will be less subjected to temperature change and mechanical vibration. Position the LP side flange at a height lower than that of the minimum liquid level.
  • Page 20 Open Tank Closed tank (without seal Close tank (with seal liquid) liquid) 11, 22, Provide suppression corresponding to differential level between Provide suppression by amount 33, 44, zero liquid level and center of pressure receiver multiplied by corresponding to measuring liquid 81, 82 specific-gravity of liquid measured.
  • Page 21 Fig. 3-14. Calculation of Elevation/Suppression Values...

  • Page 22: Chapter 4. Operation Method

    Chapter 4. OPERATION METHOD The meter body, together with the transmitter coupled to it, starts operating as the air supply and process input are fed to it. (It is recommendable to check the operation of the transmitter before starting the running operation.) 4-1.

  • Page 23: Liquid Level Transmission

    4-2. LIQUID LEVEL TRANSMISSION The operation method (start up procedure) here is described assuming that the meter body is installed as shown in Sections 3-5-1 Fig. 3-9 and 3-5-2 of Part "Chapter 3. INSTALLATION". No operation procedure is needed for the process connections with flanges (diaphragms). Of Model 71 or 72, operation is ready when its installation is over.

  • Page 24: Chapter 5. Inspection And Maintenance

    Chapter 5. INSPECTION AND MAINTENANCE For routine inspection and maintenance, pay attention to the following: 5-1. CHECK FOR LEAK FROM PIPING Check that there is no leak in the piping from the pressure tap points to the meter body. If any loose connections are found, tighten them securely.
  • Page 25 5-2-1-2. When Blow Pipes are Provided (See Fig. 3-7 of Section 3-5, Part "Capter 3. INSTALLATION.") (1) Close the stop valve of the high pressure side of the manifold valve. (2) Close the stop valve of the low pressure side of the manifold valve. (3) Slowly open the blow valves of both high and low pressure sides to drain out sediment or other entrapped substance.
  • Page 26 Model Tightening torque (kgf∙cm) Material of Clamping-bolts When new When gasket is gasket is used re-used 11/22, 61/62 Chrome molybdenum steel Chrome molybdenum steel Chrome molybdenum steel 81/82 1400 Chrome molybdenum steel 5-2-3. Notes for Use in Freezing Season When the transmitter used for measurement of water or other freezable liquid is paused in a freezing season or area, loosen the drain plugs and drain out liquid from the pressure chambers to prevent freezing.
  • Page 28 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 29 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 31 Document Number: OM2-5220-1100 Document Name: Differential Pressure Detectors (Meter Bodies) Model KDP/KFDB User's Manual Date: 4th edition: Jan. 2020 Issued/Edited by:...

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