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Azbil KFDB, User Manual

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33

7-3.  Pilot Relay

No.

Name

Quantity

1.

SCREW

3

2.

VALVE STEM

1

3.

HOUSING

1

4.

GUIDE PIN

6

5.

CONICAL SPRING

1

6.

WASHER

1

7.

SPRING

1

8.

NOZZLE

1

9.

WASHER

1

10.

SEAL

1

11.

DIAPHRAGM (LOWER)

1

12.

EXHAUST RING (OUTER)

1

13.

EXHAUST RING (INNER)

1

14.

AREA PLATE

1

15.

WASHER

1

16.

DIAPHRAGM (UPPER)

1

17.

COVER

1

19.

NUT

3

Fig. 7-3.  Pilot Relay Assembly

Summary of Contents for KFDB

Page 1: ...OM2 6220 0000 Field Mounted Indicating Controller Model KFDB KFKB KFLB User s Manual...

Page 2: ...s for a particular purpose and makes no express warranty except as may be stated in its written agreement with and for its customer In no event shall Azbil Corporation be liable to anyone for any indi...

Page 3: ...ve 16 Chapter 4 CALIBRATION AND ADJUSTMENT OF TRANSMITTER SECTION 17 4 1 General 17 4 2 Calibration of Differential Pressure Transmitter 17 4 3 Calibration of Gauge Pressure Transmitter 19 4 4 Calibra...

Page 4: ......

Page 5: ...instrument can be converted to measure a flow differential pressure liquid level or pressure simply by changing the detector elements 1 2 Structure Mechanically the instrument consists of a detector...

Page 6: ...sure Flange type Remote sealed type High working pressure type KFDB11 22 KFDB33 KFDB44 KFDB61 62 KFDB71 72 KFDB81 82 OM2 5220 1100 Pressure High pressure Low pressure Absolute pressure Remote sealed t...

Page 7: ...3 Fig 1 2 Layout of Internal Components...

Page 8: ...tial gap P external reset or PD external reset Proportional Band P 5 to 500 direct or reverse action Integral Time I 0 05 to 30 minutes Derivative Time D 0 05 to 30 minutes Differential Gap Adjustable...

Page 9: ...ight JIS F 8001 Class 3 splash proof NEMA 3 IEC IP 54 Materials Case Aluminium diecast Cover Glass fiber reinforced polyester resin Finish Baked acryl paint corrosion resistant paint and silver paint...

Page 10: ...l is converted into force by the feedback bellows and vector component F1 is fed back to the beam via the strap as shown in Fig 1 3 thereby making up a feedback loop which brings the beam into equilib...

Page 11: ...splacement to drive the meter pointer At the same time the mechanism provides another deviation signal which is fed to the controller mechanism which renders proportional integral and or derivative ac...

Page 12: ...lapper pin which is linked with the feedback link to change the gap between the nozzle and flapper thereby changing the nozzle back pressure The nozzle back pressure is amplified by the pilot relay to...

Page 13: ...e restriction and capacity chamber of the integral unit in order to provide an integral I action By adding the deriva tive unit a derivative D action can be attained A derivative bellows is provided i...

Page 14: ...d by replacing the feedback chamber of the proportional unit with a spring and feeding the output pressure of the pilot relay to the integral chamber The differential gap width is adjustable for a ran...

Page 15: ...tic control output pressure of the controller As you press the check button the gauge indicates the pressure regulator output manual loading pressure When in the MAN mode the transfer lever set in the...

Page 16: ...ceives an external pneumatic pressure setting signal 20 to 100 kPa 0 2 to 1 0 kgf cm2 and converts it into mechanical displacement which is fed via the overtravel link to the deviation generating mech...

Page 17: ...e and from mechanical vibration 2 2 Air Supply The air supply must be dry and clean 2 3 Air Connection Ports The air connection ports are provided at lower sections of the controller and are of a Rc 1...

Page 18: ...14...

Page 19: ...the process to be controlled 3 3 Instrument With Manual Loader 3 3 1 Manual Operation First stabilize the process by manual operation Set the A M Selector lever to the M position and adjust the press...

Page 20: ...that the pneumatic controller output signal increases and saturates Proportional band P PROP BAND dial at 50 Integral time I RESET dial at 0 05 minutes 3 Set the output pressure at the desired batch s...

Page 21: ...of the instrument 4 2 Calibration of Differential Pressure Transmitter 1 Release the low pressure connection port marked L to atmosphere 2 Connect to the high pressure connection port marked H a varia...

Page 22: ...comes 100 1 4 4 99 If the output is lower than 100 turn the boss so that the output becomes higher than 100 by an amount of 1 4 of the shift For example if the output is 98 turn the boss so that the o...

Page 23: ...higher than 100 turn the boss so that the output becomes lower than 100 by an amount of 1 4 of the shift For example if the output is 104 turn the boss so that the output becomes 100 1 4 4 99 If the...

Page 24: ...ube using a thread or fine wire looped into two circlets 4 5 1 Calibration Formula and procedure for Liquid Level Transmission 1 To calculate the weight buoyancy for calibration use the following form...

Page 25: ...ss so that the output becomes lower than 100 by an amount of 1 4 of the shift For example if the output is 104 turn the boss so that the output becomes 100 1 4 4 99 If the output is lower than 100 tur...

Page 26: ...b Calibration weight F corresponding to buoyancy F D2 H H L 4 1 D2 H H L where H High limit of specific gravity range 4 5 4 Adjustment of Stopper 1 When the instrument is shipped from the factory the...

Page 27: ...23...

Page 28: ...24...

Page 29: ...se type of instrument 3 Inset the adjustment pin 1 2 mm dia through the adjustment pin hole 4 If the SP pointer has not been accurately aligned with the PV pointer align it accurately by means of the...

Page 30: ...y 59 1 kPa 443 mmHg is sealed in the integral chamber of the controller Since this pressure may vary if the controller is left in this state for a prolonged period of time perform the above procedures...

Page 31: ...kPa 300 mmHg by adjusting the PV input d Change the integral reset and derivative rate dials to the fully closed state 30 minutes or more e Balance the controller output pressure at 80 kPa 600 mmHg b...

Page 32: ...ustment in a similar manner as in the case of 1 3 Adjust the length of the deviation link so that the deviations read in 1 and 2 become identical values but in reverse directions The length becomes sh...

Page 33: ...es of angle Turning the pin clockwise set the pin groove horizontally at the side that the link falls 2 Set the setpoint at 50 Set the differential gap setting dial at the minimum 0 position of the IN...

Page 34: ...oint as follows a Connect the instrument output OUT connection port a pressure gauge of Class 0 5 better b Set the proportional band setting dial of the controller mechanism to the INC MEAS DEC OUT st...

Page 35: ...pressure 20 to 100 kPa 0 2 to 1 0 kgf cm2 to the ESP connection port of the instrument Fig 6 1 1 Zero Adjustment Apply 0 input and adjust the ZERO ADJ knob of the travel link so that the PV pointer i...

Page 36: ...t knob If the error is in the positive side of the scale shorten the travel link turn the knob counterclockwise as viewed from the instrument bottom c The zero point also will vary as the travel link...

Page 37: ...the stained filters Clean the dirty restrictions using a needle wire of 0 12 mm diameter 7 2 Controller Unit 1 Turn off the air supply and remove the deviation link 2 Remove the four screws of the bas...

Page 38: ...32 Fig 7 2 Maintenance of Controller Unit...

Page 39: ...HOUSING 1 4 GUIDE PIN 6 5 CONICAL SPRING 1 6 WASHER 1 7 SPRING 1 8 NOZZLE 1 9 WASHER 1 10 SEAL 1 11 DIAPHRAGM LOWER 1 12 EXHAUST RING OUTER 1 13 EXHAUST RING INNER 1 14 AREA PLATE 1 15 WASHER 1 16 DIA...

Page 40: ...on 3 3 2 Apply a deviation in the direction that the AUTO output is decreased Turn the SP knob so that SP is smaller than PV when in the reverse action or SP is greater than PV when in the direct acti...

Page 41: ...y and inspect diaphragm If leak is found replace diaphragm Controller output pressure is too high Nozzle of controller unit is clogged Clean the nozzle Stained valve seat of pilot relay Take out pilot...

Page 42: ...36 Pneumatic Circuit Diagram...

Page 43: ......

Page 44: ...o your use 3 Measures to be taken to secure the required level of the reliability and safety of your Equipment in your use Although azbil is constantly making efforts to improve the quality and reliab...

Page 45: ...argin of your machine or equipment you are required to renew any Azbil Corporation s products every 5 to 10 years unless otherwise specified in specifications or instruction manuals System products fi...

Page 46: ......

Page 47: ...Document Number OM2 6220 0000 Document Name Field Mounted Indicating Controller Model KFDB KFKB KFLB User s Manual Date 7th edition Jan 2020 Issued Edited by...

Page 48: ......

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