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Cameron Barton 199 User Manual

Differential pressure unit dpu standard and nace service
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CONTENTS
Section 1 - Introduction .................................................................. Page 3
Section 2 - Theory of Operation .................................................... Page 5
Section 3 - Installation/Operation ................................................ Page 9
4-2. DPU Inspection and Cleaning............................................. Page 13
4-3. Calibration Setup .................................................................. Page 18
4-5. Range Change ....................................................................... Page 19
4-6. Setting Bellows Travel .......................................................... Page 22
4-8. Attaching Drive Arm to Torque Tube ................................. Page 24
4-9. Drive Arm Tightness Test .................................................... Page 24
4-10. Adjusting Pulsation Dampener ......................................... Page 25
4-11. Troubleshooting .................................................................. Page 25
Section 5 - Parts Drawing/List ....................................................... Page 27
Section 6 - Outline Dimension Drawings ..................................... Page 30
(This manual is for the DPU only.) Refer to the appropriate (separate)
instrument manual for information on the instrument being actuated.
DIFFERENTIAL PRESSURE UNIT (DPU)
MODEL 199
Standard and NACE Service
Manual No. 9A-10030, Rev. 01
User Manual
January 2008

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Michael Drury
July 22, 2025

do i need to adjust the torque tube, before i replace the bellows and range spring?

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Summary of Contents for Cameron Barton 199

  • Page 1: Table Of Contents

    MODEL 199 DIFFERENTIAL PRESSURE UNIT (DPU) Standard and NACE Service User Manual Manual No. 9A-10030, Rev. 01 January 2008 CONTENTS Section 1 - Introduction ..............Page 3 Section 2 - Theory of Operation ............ Page 5 Section 3 - Installation/Operation ..........Page 9 Section 4 - Maintenance, Adjustment, &...
  • Page 2 Barton instrument is as stated on the back (last...

  • Page 3: Section 1 - Introduction

    SECTION 1 - INTRODUCTION 1-1. General The Barton ® Model 199 Differential Pressure Unit (DPU) (see Figure 1 -1) is a mechanical device which accurately measures differential pressure relative to a gas or liquid flowing through a process system, or to the level of a liquid con­ tained in a process vessel.

  • Page 5: Section 2 - Theory Of Operation

    SECTION 2 - THEORY OF OPERATION 2-1. Basic Components (See Figure 2-1) Torque Tube Center Plate Shaft LP Bellows Torque Tube Range Spring HP Bellows HP Over- LP Housing range Valve Temperature Compensator LP Overrange HP Housing Valve Housing Bolts Pulsation Damper Damping Valve Plug Valve Stem...
  • Page 6 The bellows and center plate are filled with fill liquid via the drive arm hole plug. An opening through the center plate provides a passageway for the transfer of fill liquid between the two bellows. This opening also allows the bellows to be connected internally by a valve stem.
  • Page 7 D. Torque Tube Assembly Needle Beaing Center Plate O-Ring Seal Weld Torque Tube Lock Nut Torque Tube Torque Tube Shaft 8° Drive Arm Rotation Valve Stem Disc 0.200" Weld Bellows Travel Ball Bearing Minature Precision Valve Stem Ball Bearing Figure 2-3. Torque Tube Assembly As illustrated in Figure 2-3, the torque tube assembly consists of a torque tube, a torque tube shaft, and the supporting members.
  • Page 8 (Blank Page)

  • Page 9: Section 3 - Installation/Operation

    SECTION 3 - INSTALLATION/OPERATION 3-1. Unpacking The 199 DPU should be inspected at time of unpacking to detect any damage that may have occurred during shipment. NOTICE: The instrument was checked for accuracy at the factory — do not change any of the settings during examination or accuracy will be affected. NOTICE: For application in critical media, requiring special cleaning pro- cesses and precautions, a polyethylene bag is used to protect the instrument from contamination.
  • Page 10 3-3. Piping — Standard Practices (Cont.) Rotate the housing as necessary to place the connection in the proper position. The DPU has connections in the pressure housings to accom- modate various pipe sizes (refer to Section 6- Drawings). Install a valve manifold connecting the DPU and the source of differen- tial pressure to facilitate operation and checking of the DPU.
  • Page 11 3-4. General Startup Practice Considerations (Cont.) Perform a zero check on the instrument as follows (Cont.) If necessary, adjust the pen or pointer by turning the zero adjust on the instrument. Check the manifold and piping for leaks as follows. Open the bypass valve(s), then open one shutoff valve to pressurize the instrument.
  • Page 12 (Blank Page)

  • Page 13: Section 4 - Maintenance, Adjustment, & Calibration

    SECTION 4 - MAINTENANCE, ADJUSTMENT, & CALIBRATION 4-1. Tools Required for Maintenance and Calibration A calibration tool kit (P/N 0202-1005B) containing the necessary tools is avail- able from the factory. The following tools are required for maintenance and calibration of the DPU: Table 4-1.
  • Page 14 T i g h t e n t h e b o l t s a n d r e t u r n t h e u n i t t o t h e f a c t o r y f o r r e p a i r .
  • Page 15 Table 4-2. Standard Bolt Torque Ratings Housing Bolts SWP Mat'l Mat'l Size Part No. Steel Steel 3/8-16 x 4.5 0199-1345C 180° 1000 Cres Steel 3/8-16 x 4.5 0199-1345C 270° Alum Steel 3/8-16 x 4.5 0199-1345C 180° 2500 Steel Steel 1/2-13 x 5.5 0199-0085C 180°...
  • Page 16 Table 4-3. NACE Bolt Torque Ratings Item 2000 PSI 3000 PSI 4500 PSI (13.8 MPa) (20.7 MPa) (31.0 MPa) 12 Pt. Head Bolt 12 Pt. Head Bolt Fastener 12 Pt. Head Bolt with Hex Nut with Hex Nut Bolt Size 1/2-13 x 5.5"...
  • Page 17 (3) For DP units marked as 1850 PSI (12.7 MPa) and 1500 PSI (10.3 MPa) originally supplied with 12- point head bolts, Cameron has re-rated these lower pressure DPUs to 2000 PSI (13.7 MPa). Apply the parts and use the torque values for the 2000 PSI model (Table 4-3).

  • Page 18: Calibration Setup

    All NuFlo instruments using 199 DPU as actuator are calibrated at the factory. All Barton instruments using 199 DPU as actuator are calibrated at the factory. All DPUs sold as replacement units or as actuators for other applications are All DPUs sold as replacement units or as actuators for other applications are checked for accuracy prior to shipment.

  • Page 19: Range Change

    4-5. Range Change Changing the range of the Model 199 DPU requires replacing the bellows unit assembly with a unit of the desired range (see para. 4-7 Bellows Unit Assembly (BUA) Replacement). WARNING (High-pressure Gas Installations with pressures greater than 200 psig) HIGH-PRESSURE GAS HAZARD ON DISASSEMBLY OF THE DPU.
  • Page 20 A. 2-1/8-inch Dia. Bellows (Cont.) If the pointer is set above zero, rotate the spring adjustment clockwise until the pointer is set at zero. If the pointer is below zero rotate the spring adjustment conterclockwise until the pointer is set at zero. Replace and tighten the lock nut.
  • Page 21 C. 3-3/4-inch Dia. Bellows w/Kickoff* Spring (Cont.) (see Figure 4-2) Position range spring assembly over retainer posts and replace retainer nuts. Insert the tubing between the range springs and tighten inboard lock nut. Zero the pointer by adjusting the spud on the push rod. Be sure that the kickoff spring is not engaged during this operation.

  • Page 22: Setting Bellows Travel

    C. 3-3/4-inch Dia. Bellows w/Kickoff* Spring (Cont.) 11. Apply 100 percent negative pressure to the high-pressure side of the DPU and repeat the clearance check and adjustment of step 9. 12. Apply 100 percent positive pressure to the high-pressure side of the DPU and repeat the clearance check and adjustment of step 9.
  • Page 23 4-7. Bellows Unit Assembly (BUA) Replacement (Cont.) (See Figure 2-1) COMPONENT REMOVAL NOTICE: See (separate) actuated instrument Manual for particular components that must be removed to gain access to DPU case mounting screws. Support DPU during disassembly. Do not loosen drive arm hold plug (located in the top of the BUA center plate) when removing mounting bracket.

  • Page 24: Attaching Drive Arm To Torque Tube

    4-8. Attaching Drive Arm to Torque Tube Figure 4-4. Drive Arm to Torque Tube Connection Slip drive arm over torque tube shaft; clear end of torque tube housing by approximately 0.030 inches before securing to prevent interference. To tighten the drive arm assembly onto the torque tube shaft: Supporting block and shaft, tighten clamp screw until snug to shaft.

  • Page 25: Adjusting Pulsation Dampener

    4-10. Adjusting Pulsation Dampener (See Figure 2-1) Remove dust cover and insert 1/8 hex key into needle valve. Turn valve clockwise to closed position, approx. 3 turns. Back out valve 1/2 turn or as required to reduce pulsations/shock pres- sures. 4-11.
  • Page 26 Table 4-5. Troubleshooting Chart (Continued) High Primary Orifice partially restricted Clean out or replace Indication or too small Piping from Leak in LP side piping Repair leaks Primary Element to DPU Bellows Unit Gas trapped (liquid service) Vent housing in LP housing or liquid trapped (gas service) in HP housing LP housing gasket leaks...

  • Page 27: Section 5 - Parts Drawing/List

    SECTION 5 - PARTS DRAWING/LIST 5-1. General The parts list and parts identification drawing(s) for the DPU are presented in the separate DPU Manual. Figure 5-1. 199 DPU Parts Drawing...
  • Page 28 WARNING (NACE SERVICE) HAZARDOUS GAS AND PRESSURE HAZARD IN NACE QUALIFIED SERVICE. USE ONLY NACE QUALIFIED REPLACEMENT PARTS FOR HOUSINGS, BOLTS, AND BUA. FOR NACE BOLT PART NUMBERS, REFER TO TABLES 4-3 & 4-4. ANY DEVIATION FROM USE OF QUALIFIED NACE PARTS IN NACE SERVICE WILL VOID THE INSTRUMENT/DPU NACE RATING(s).
  • Page 29 Table 5-1. 199 Parts List (Continued) ITEM DESCRIPTION PART NO. UNIT O-RING, 2-127, NITRILE N3 ** 0001-1178R GASKET, TORQUE TUBE 0199-0209C NOT USED SCREW, RECORDER BRACKET, HEX, WASHER 0002-0033T HD., 3/8-16 X 5/8 GASKET, PRESSURE HOUSING: ** 0199-0027C 1000 PSI ALUMINUM UNITS 0199-0027C 2500/3000/4500 PSI STEEL UNITS 0199-0184C...

  • Page 30: Section 6 - Outline Dimension Drawings

    SECTION 6 - OUTLINE DIMENSION DRAWINGS Figure 6-1. 199 DPU Dimension Drawing (Part 1 of 2)
  • Page 31 Figure 6-1. 199 DPU Dimension Drawing (Part 2 of 2) Table 6-1. 199 DPU Dimensions PRESSURE PRESSURE DIM. A DIM. B DIM. C CONNECTION HOUSING RATING INCHES INCHES INCHES MATERIAL PSI (MPa) (mm) (mm) (mm) BOTTOM 1,000 1/2 NPT 1/4 NPT 6-5/8 2-9/64 CAST ALUM.
  • Page 32 Cameron agrees to repair or furnish a replacement for, but not install, any prod- uct which within one (1) year from the date of shipment by Cameron shall, upon test and examination by Cameron, prove defective within the above warranty.

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