Table of Contents
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Contents
Safety ............................................................................................................ 2
Section 1-Introduction ................................................................................. 3
General ......................................................................................................... 3
Product Description....................................................................................... 3
................................................................................................ 5
Section 2-Installation ................................................................................... 7
General ......................................................................................................... 7
Mounting/Piping/DPU Installation ................................................................. 7
Zero Check/Adjustment ................................................................................ 7
Startup .......................................................................................................... 8
Section 3-Maintenance and Calibration ..................................................... 9
Tools.............................................................................................................. 9
Bezel/Lens (or Cover) Installation and Removal .......................................... 9
Calibration Check........................................................................................ 10
Pointer Installation and Removal ................................................................ 10
Pointer Installation .................................................................................. 10
Pointer Removal ...................................................................................... 10
Indicator Calibration .....................................................................................11
Drive Arm Tightness Test ......................................................................... 14
Drive Arm Stop Adjustment .................................................................... 14
Troubleshooting ......................................................................................... 14
Linkage .................................................................................................... 14
Pointer ..................................................................................................... 14
DPU ......................................................................................................... 14
Section 4-Assembly Drawings and Parts Lists ....................................... 15
Section 5-Dimensional Drawings ............................................................. 23
Appendix A-Model 224 DPU ....................................................................A-1
DPU Description ........................................................................................A-1
Theory of Operation ...............................................................................A-3
DPU Installation .........................................................................................A-4
www.ittcontrols.com
www.ittcontrols.com
BARTON
NUCLEAR MODEL 227A/227AS
®
DIFFERENTIAL PRESSURE INDICATOR
.........................................................................................A-1
Part No. 9A-C10122, Rev. 02
contact@ittcontrols.com
contact@ittcontrols.com
User Manual
April 2011
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Summary of Contents for ITT Controls Barton Nuclear 227A
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Page 1: Table Of Contents
BARTON NUCLEAR MODEL 227A/227AS ® DIFFERENTIAL PRESSURE INDICATOR User Manual Part No. 9A-C10122, Rev. 02 April 2011 Contents Safety ......................2 Section 1—Introduction ................. 3 General ......................3 Product Description..................3 ....................5 Section 2—Installation ................... 7 General ......................7 Mounting/Piping/DPU Installation .............. -
Page 2: Section 1-Introduction
Model 227A Di erential Pressure Indicator Section 1 Section 1—Introduction General The Model 227A Differential Pressure Indicator is designed to measure measurement applications, the instrument is connected to monitor changes in differential pressure relative to variations of liquid height in a vessel. Product Description The indicator has a 6-inch dial. - Page 3 Section 1 Model 227A Di erential Pressure Indicator The indicator movement has a micrometer screw for range adjustment. Zero is adjusted by "slipping" the pointer on the hub. Both the zero and range ad- justments can be made without removing the scaleplate or pointer. Linearity adjustments are accessible when the scale plate is removed.
- Page 4 Model 227A Di erential Pressure Indicator Section 1 Figure 1.3—Indicator mechanism for inverted case Because the indicator design affects the readout, only inverted scale plates may be used with inverted indicators, and only universal scale plates may be used with universal type units. See Table 4.1, page 17 descriptions and part numbers.
- Page 5 Section 1 Model 227A Di erential Pressure Indicator Overall Dimensions ......See Section 5, page Weight ..........tion and materials Differential Pressure Unit (DPU): Appendix www.ittcontrols.com contact@ittcontrols.com...
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Page 6: Section 2-Installation
Model 227A Di erential Pressure Indicator Section 2 Section 2—Installation General The instrument should be inspected at time of unpacking to detect any dam- age that may have occurred during shipment. IMPORTANT: The DPU was checked for accuracy at the factory. Do not change any of the settings during examination or accuracy could be affected. -
Page 7: Startup
Section 2 Model 227A Di erential Pressure Indicator Pointer "slipped" rotated on hub Hub held in place with 1/4" wrench Figure 2.1—"Slipping" pointer Startup For startup procedures, warnings, and other information, refer to Appendix IMPORTANT: To ensure the unit calibration is within factory-set calibration tolerances, perform the Calibration Check procedure on page www.ittcontrols.com... -
Page 8: Section 3-Maintenance And Calibration
Model 227A Di erential Pressure Indicator Section 3 Section 3—Maintenance and Calibration For preventive maintenance, periodically inspect linkage for wear. When repairs are necesssary, review this section for maintenance procedures such as bezel/lens installation and removal, scale plate installation and re- moval, pointer installation and removal, and indicator calibration. -
Page 9: Calibration Check
Section 3 Model 227A Di erential Pressure Indicator IMPORTANT: Ensure the bezel gasket is properly oriented before placing the instru- ment back in service. Incorrect gasket orientation will cause the instru- ment indicator to jam, resulting in inaccurate readings. Calibration Check To ensure the unit calibration is within factory-set calibration tolerances, perform the following procedure. -
Page 10: Indicator Calibration
Model 227A Di erential Pressure Indicator Section 3 1. Slide the pointer puller along the pointer until the pin protruding from the tip of the screw in the pointer puller is directly over the movement shaft and the arms of the pointer puller are directly under the pointer. Gently turn the knurled head of the screw clockwise, pushing the pin against the movement shaft and lifting the pointer with the arms. - Page 11 Section 3 Model 227A Di erential Pressure Indicator Figure 3.3—Universal range/linearity adjustment (50% DP) Figure 3.4—Inverted range/linearity adjustment (50% DP) SINTERED LINK CLAMP BLOCK .03 (approx) DRIVE ARM M224 CLAMP SCREW SHAFT 1/8” WRENCH (PN 9A-0163-0044C) TO TIGHTEN Figure 3.5—Drive arm to torque tube connection www.ittcontrols.com contact@ittcontrols.com...
- Page 12 Model 227A Di erential Pressure Indicator Section 3 8. Apply 100% DP. If pointer exceeds 100% on scale, lengthen the range arm by adjusting the range adjust screw with a 1/8-in. open-end wrench. 9. Release pressure. Set the pointer to zero (refer to Zero Check/Adjust- ment, page 10.
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Page 13: Drive Arm Tightness Test
Section 3 Model 227A Di erential Pressure Indicator Drive Arm Tightness Test This procedure tests the tightness of the drive arm's connection to the torque should be taken to apply pressure slowly, as torque is being applied to the connection through the torque tube drive shaft. 1. -
Page 14: Section 4-Assembly Drawings And Parts Lists
Model 227A Di erential Pressure Indicator Section 4 Section 4—Assembly Drawings and Parts Lists Figure 4.1—Model 227A indicator, universal design www.ittcontrols.com contact@ittcontrols.com... - Page 15 Section 4 Model 227A Di erential Pressure Indicator Figure 4.2—Model 227A indicator, inverted design www.ittcontrols.com contact@ittcontrols.com...
- Page 16 Model 227A Di erential Pressure Indicator Section 4 Table 4.1—Parts List, Model 227A Indicator Item Description Part No. Per Unit Case Universal 9A-C0227-0014C Inverted 9A-C0227-1028C Bezel (Part of Item #20) 9A-C0277-0029C Lens (Part of Item #20) 9A-C0181-0038C Gasket (Part of Item #20) 9A-C0277-0026C Scale Plate White on Black Background (Universal)
- Page 17 Section 4 Model 227A Di erential Pressure Indicator Table 4.1—Parts List, Model 227A Indicator Item Description Part No. Per Unit Assembly, Bezel (Items 2, 3, & 4) 9A-C0277-0018B Bezel Stud 9A-C0004-0005K Disc Sealer 9A-C0192-1035T O-Ring, Case Seal, Viton 2-111 9A-C0001-1057R Sealing Compound, RTV 103 9A-C0006-1001V Differential Pressure Unit (DPU) (not shown)
- Page 18 Model 227A Di erential Pressure Indicator Section 4 Figure 4.3—Model 227A indicator, SST case www.ittcontrols.com contact@ittcontrols.com...
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