Barton 199 DPU Manual - Part No. 9A-10030 - Cameron

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SECTION 1 - INTRODUCTION1-1. GeneralThe Barton ® Model 199 Differential Pressure Unit (DPU) (see Figure 1 -1) is amechanical device which accurately measures differential pressure relative to agas or liquid flowing through a process system, or to the level of a liquid containedin a process vessel.For process flow measurements, the DPU is connected across a primary device(a venturi, an orifice plate or a flow tube) located in the process system.For liquid level measurements, the DPU may be connected in a variety of waysto measure the difference in pressure caused by variations in the level of theliquid in the process vessel.1-2. Product DescriptionThe Model 199 DPU is a dualHP Housingbellows assembly enclosed withinLP Housingpressure housings. The dualbellows assembly consists of twoopposing internally connected liq-Ventinguid-filled bellows, a center plate,Connectionrange springs, overrange valves, Torque Tubeand a torque tube assembly.ShaftThe pressure housings are connectedby Pipe or tubing to theprimary device located in the sys-PressureConnectionMountingtem piping. Variations in differen-Brackettial pressure within the pressurehousings cause the bellows to expand or contract in a linear direction towardsthe side having the lowest pressure.The linear movement of the bellows is converted into angular rotation whentransmitted to the torque tube shaft by the drive arm and this mechanical motionactuates the mechanism of the process monitoring instrument.The process monitoring instrument that is connected to the torque tube assemblymay be an indicator, a switch, a transmitter, a recorder, or other processcontrol device.1-3. SpecificationsTorque Tube Rotation (full scale DP).............8° ±10%Torque Tube Material..................................Beryllium Copper (BeCu)Temperature Limits ....................................-40°F/°C to +180°F (+82°C)Maximum Non-linearity:0-10" w.c. to 0-400" w.c.(0-25 mbar to 0-993 mbar) .........................±0.5% of full scale withappropriate linkage0-401" w.c. to 0-100 psi(0-996 mbar to 0-6.9 bar) ...........................±0.75% of full scale withappropriate linkageRepeatability ..............................................0.20% of full scale DPHousing Materials/Ranges ..........................Refer to Table 1-13
Page 1: MODEL 199DIFFERENTIAL PRESSURE UNIT
Page 5 and 6: SECTION 2 - THEORY OF OPERATION2-1.
Page 7 and 8: D. Torque Tube AssemblyCenter Plate
Page 9 and 10: SECTION 3 - INSTALLATION/OPERATION3
Page 11 and 12: 3-4. General Startup Practice Consi
Page 13 and 14: SECTION 4 - MAINTENANCE, ADJUSTMENT
Page 15 and 16: Table 4-2. Standard Bolt Torque Rat
Page 17 and 18: Table 4-4. Special 6,000 PSI NACE B
Page 19 and 20: 4-5. Range ChangeChanging the range
Page 21 and 22: C. 3-3/4-inch Dia. Bellows w/Kickof
Page 23 and 24: 4-7. Bellows Unit Assembly (BUA) Re
Page 25 and 26: 4-10. Adjusting Pulsation Dampener
Page 27 and 28: SECTION 5 - PARTS DRAWING/LIST5-1.
Page 29 and 30: Table 5-1. 199 Parts List (Continue
Page 31 and 32: Figure 6-1. 199 DPU Dimension Drawi

Barton 199 DPU Manual - Part No. 9A-10030 - Cameron

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