Differential pressure flow measurement with pitot tubes and deltabar differential pressure transmitter the universal measuring system for steam, gases and liquids (56 pages)
Safety instructions Deltatop DP71B, DP72B, DP73B Safety instructions Designated use The measuring system is used to measure the volume or mass flow of saturated steam, superheated steam, gases and liquids. In the event of incorrect use or use other than that designated, the operational safety of the measuring devices can be suspended.
Deltatop DP71B, DP72B, DP73B Safety instructions Notes on safety conventions and icons In order to highlight safety-relevant or alternative operating procedures in the manual, the following conventions have been used, each indicated by a corresponding symbol in the margin. Safety conventions...
Identification Deltatop DP71B, DP72B, DP73B Identification Nameplate Deltatop Mat.of primary: Assembled in USA. Greenwood.In. Order Code: Fluid: Flow rate: Calc. dP value: Ident.No.: Pressure: Serial No.: Temperature: Pipe ID: K-Faktor: Wall thickness: Press. rate: 25002573-– 25002572-– P01-xxxxxx-18-xx-00-xx-003 Order code: Order code of the device according to the product structure (see Technical Information TI441P) Ident.
Identification Deltatop DP71B, DP72B, DP73B 2.3.3 Deltabar M Document Device Designation Technical Information TI434P Deltabar M Differential pressure transmitter Operating Instructions BA382P Deltabar M Differential pressure transmitter - HART Safety Instructions XA457P Deltabar M ATEX II 1/2 G, II 2 G, Ex ia IIC T6 to T4...
Deltatop DP71B, DP72B, DP73B Installation Installation Incoming acceptance, transport, storage 3.1.1 Incoming acceptance Check the packing and contents for any sign of damage. Check the shipment, make sure nothing is missing and that the scope of supply matches your order.
Installation Deltatop DP71B, DP72B, DP73B Mounting position for liquid or steam applications With liquid or steam applications, the transmitter must be mounted below the pipe. All impulse pipes must be installed with a slope of at least 1:15 to the transmitter - coming from the process connection.
Deltatop DP71B, DP72B, DP73B Installation " Caution! For flow measurements in vertical pipes, the primary device should be mounted at a position with upward flow. This prevents partial emptying of the pipe during measurement. Mounting position for gas applications With gas applications, the transmitter must be mounted above the pipe. All impulse pipes must be installed with a slope of at least 1:15 to the process connection - coming from the transmitter.
Installation Deltatop DP71B, DP72B, DP73B General mounting conditions 3.5.1 Upstream and downstream lengths In order to ensure a homogeneous flow profile, it is necessary to mount the Pitot tube at a sufficient distance to narrowings or bends in the pipe. The required upstream and downstream lengths for...
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Deltatop DP71B, DP72B, DP73B Installation 3.5.3 Mounting position • The mounting position must be chosen such that access to the transmitter is always possible. • If the following process temperatures are exceeded, a remote version has to be used. The transmitter must be mounted at a sufficient distance from the primary device.
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Installation Deltatop DP71B, DP72B, DP73B 3.5.5 Mounting position for temperature and pressure compensation Separate process connections Endress+Hauser Endress+Hauser RMC621 RMC621 Two additional probes are required for temperature and pressure compensation: Dp T • An absolute pressure sensor This sensor must be mounted on the upstream side of the Pitot tube.
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Deltatop DP71B, DP72B, DP73B Installation 3.5.6 Practical limits For a reliable measurement with Pitot tubes, the practical limits are shown in the table below. Equivalent dp with the respective medium velocity. Medium Minimum DP Equivalent velocity 0.1" (2.5 mm) H 15 ft/sec.
Installation Deltatop DP71B, DP72B, DP73B General mounting information • The primary element is calculated for specific pipe and operating data. Therefore it is essential to check if the data on the nameplate (→ ä 6) match the actual operating data.
Deltatop DP71B, DP72B, DP73B Installation Installation steps for the welding socket version P01-DP7xxxx-17-xx-xx-xx-001 A: Without end support B: With end support 1: Sensor 2: Compression nut 3: Back ferrule 4: Front ferrule 5: Compression body 6: Welding socket 7: Opposite end welding socket 8: Support plug...
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Installation Deltatop DP71B, DP72B, DP73B e. Remove the probe and perform the finish welding. Using appropriate pipe thread sealant, install the compression body into the welding socket. The tapered end of the front ferrule must point towards the compression body.
Deltatop DP71B, DP72B, DP73B Installation Installation steps for the welding socket version with a spring lock Diameter of the hole D1 • DP71B: 1/2" (13 mm) • DP72B: 1" (25 mm) Note! • Do the pipe dimensions (inner diameter, wall...
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Installation Deltatop DP71B, DP72B, DP73B Note! For the DP71B and DP72B sensors, tighten the load nuts until the load plate is 0.050" (1.3 mm) from the indicator ring. For the DP73B sensors, the load plate should be 0.063" (1.6 mm) from the indicator ring.
Deltatop DP71B, DP72B, DP73B Installation Installation steps for the welding flange version P01-DP7xxxx-17-xx-xx-xx-003 A: Without end support B: With end support 1: Sensor flange 2: Sensor 3: Nut 4: Stud 5: Gasket 6: Mounting flange and weld coupling 7: Weld coupling 8: Weld cap...
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Installation Deltatop DP71B, DP72B, DP73B If an end support is to be mounted: a. Take a cord and tie one of its ends around the welding socket. Wrap the other end of the cord around the pipe so that it forms a loop around the pipe. Mark the half-way point of the circumference on the pipe.
Deltatop DP71B, DP72B, DP73B Installation 3.10 Installation steps for the welding flange version with a spring lock Diameter of the hole D1 • DP71B: 1/2" (13 mm) • DP72B: 1" (25 mm) Note! • Do the pipe dimensions (inner diameter, wall...
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Installation Deltatop DP71B, DP72B, DP73B 10. With the follower and packing rings already in place, insert the sensor into the spring lock body. Note! The three studs must pass through the indicator ring and the load plate. 11. Bolt the sensor flange to the mounting flange with the gasket between the flanges. The nuts should be tightened until the gasket is completely compressed.
Deltatop DP71B, DP72B, DP73B Installation 3.11 Installation steps for the flowtap welding socket version with a safety chain Diameter of the hole D1 • DP71B: 1/2" (13 mm) • DP72B: 1" (25 mm) Note! • Do the pipe dimensions (inner diameter, wall...
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Installation Deltatop DP71B, DP72B, DP73B 3.11.2 Installation of the manifold and the transmitter (for the remote version): The impulse pipes have to be installed with the required slope (for liquids or steam: → ä 10, for gases: → ä 11).
Deltatop DP71B, DP72B, DP73B Installation 3.12 Installation steps for the flowtap flange socket version with a safety chain Diameter of the hole D1 • DP71B: 1/2" (13 mm) • DP72B: 1" (25 mm) Note! • Do the pipe dimensions (inner diameter, wall...
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Installation Deltatop DP71B, DP72B, DP73B Orient the sensor such that the arrow labeled "flow" on the device head is in the direction of the flow in the pipe to within 3°. Bolt the access nipple to the access valve using the gasket studs and nuts provided.
Deltatop DP71B, DP72B, DP73B Installation 3.13 Installation steps for the flowtap welding socket version with a spindle P01-DP7xxxxx-17-xx-xx-xx-007 A: Single rod B: Double rod 1: Drive nut 2: Sensor bushing 3: Sensor plate 4: Packing bolts 5: Threaded bushing 6: Packing gland 7: Jam nut...
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Installation Deltatop DP71B, DP72B, DP73B 3.13.1 Installation of the shut-off valves (for the remote version): The shut-off valves have to be mounted to the nozzles of the primary element before mounting the sensor into the pipe. 3.13.2 Installation of the manifold and the transmitter (for the remote version): The impulse pipes have to be installed with the required slope (for liquids or steam: →...
Deltatop DP71B, DP72B, DP73B Installation 3.14 Installation steps for the flowtap welding flange version with a spindle P01-DP7xxxxx-17-xx-xx-xx-008 A: Single rod B: Double rod 1: Drive nut 2: Sensor plate 3: Sensor bushing 4: Packing bolts 5: Packing gland 6: Threaded bush 7: Jam nut...
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Installation Deltatop DP71B, DP72B, DP73B Orient the valve such that the valve stem is parallel to the centerline of the pipe. a. For horizontal pipes, orient the valve such that the valve stem is parallel to the centerline of the pipe.
Deltatop DP71B, DP72B, DP73B Installation 3.15 Basic instructions regarding drilling a hole in the pipe without stopping the process (hot tapping) 3.15.1 Initial notice • While drilling a hole in a pipe without stopping the process offers advantages to users, some risks are associated with this procedure.
Installation Deltatop DP71B, DP72B, DP73B 3.16 Post-installation check 3.16.1 Checks following initial installation Perform the following checks after installing the measuring device: • Do the process temperature/pressure, ambient temperature, measuring range etc. correspond to the specifications of the device? • Does the arrow on the head of the pipe or the flange plate match the actual flow direction? •...
Deltatop DP71B, DP72B, DP73B Wiring Wiring Wiring of the Deltabar S differential pressure transmitter The wiring of the Deltabar S differential pressure transmitter is described in the following Operating Instructions: Communication Operating Instructions 4 to 20 mA HART BA270P PROFIBUS PA...
5.2.1 Calculation of the compensated volume flow or mass flow • For steam Flow and Energy Manager RMS621 for water and steam from Endress+Hauser; for details see Technical Information TI092R • For all media Universal Flow and Energy Manager RMC621 for gases, liquids and steams from Endress+Hauser;...
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Deltatop DP71B, DP72B, DP73B Operation and commissioning 5.2.2 Calculation formula for temperature and pressure compensation The starting point for compensation first has to be defined. The starting point is the calculation sheet which accompanies every primary element. Layout data for specific operating conditions (pressure and temperature) can be found on the calculation sheet.
Operation and commissioning Deltatop DP71B, DP72B, DP73B Use of accessories 5.3.1 Shut-off valves Usage Shut-off valves are used with remote versions for high-pressure and high-temperature applications. They are used as a primary shut-off for the measuring point. Depending on national regulations, primary shut-off with two shut-off valves per impulse pipe may be recommended or required.
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Deltatop DP71B, DP72B, DP73B Operation and commissioning 5.3.2 Manifold Versions P01-DOxxxxxx-14-xx-xx-xx-014 3-valve manifold P01-DOxxxxxx-14-xx-xx-xx-015 5-valve manifold; milled Valve Application 1, 2 Separates the Deltabar differential pressure transmitter from the process 3, 4 Equalization valve (zero point adjustment of the Deltabar differential pressure transmitter) •...
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Operation and commissioning Deltatop DP71B, DP72B, DP73B Usage The manifold is used to separate the Deltabar differential pressure transmitter from the process and to perform zero point adjustment. Operating principle If the Deltabar differential pressure transmitter has to be removed from the measuring point (e.g. for exchange or repair), it is possible to completely separate the transmitter from the process by closing all the valves.
Deltatop DP71B, DP72B, DP73B Troubleshooting Troubleshooting Error messages of the Deltabar S or Deltabar M Error messages of the Deltabar S differential pressure transmitter are described in the following Operating Instructions: Communication Operating Instructions (Deltabar S) Operating Instructions (Deltabar M)
Troubleshooting Deltatop DP71B, DP72B, DP73B Application errors Error Possible cause; measure No flow indicated Installation errors • No contact between process and transmitter -> Check whether the valves to the differential pressure transmitter are open. Configuration errors • Configuration of the transmitter or flow calculator incorrect or missing ->...
Deltatop DP71B, DP72B, DP73B Maintenance and repairs Maintenance and repairs Maintenance The following maintenance tasks should be performed at regular intervals: • Checking the zero point adjustment • For wet gases: drain the condensate • For soiled media: remove the sediment •...
Deltatop DP71B, DP72B, DP73B Return The following procedures must be carried out before a transmitter is sent to Endress+Hauser for repair or calibration for example: • Remove all residue which may be present. Pay special attention to the gasket grooves and crevices where medium may be present.
Deltatop DP71B, DP72B, DP73B Accessories Accessories Overview The following accessories are available for differential-pressure flow measurement with Pitot tubes: • DA73M: Shut-off valves (see Technical Information TI441P) • DA74M: Manifold (see Technical Information TI441P) Shut-off valves and the manifold can be ordered together with the Pitot tube Deltatop. They are included in the product structures DP71B, DP72B and DP73B.
Appendix Deltatop DP71B, DP72B, DP73B Appendix Measuring principle – – stat stat P01-DPxxx-15-00-00-xx-002 The front of the Pitot tube is exposed to the static pressure p plus the dynamic pressure p . The stat side and the back of the tube is exposed only to the static pressure p .
Deltatop DP71B, DP72B, DP73B Appendix Flow calculation According to the continuity law derived by Bernoulli and the energy equation, the static pressure in the flow plus the dynamic pressure is equal to a constant throughout the flow: = const. stat From this law, the following flow equations can be derived: 9.2.1...
Deltatop DP71B, DP72B, DP73B Index Index Numerics 3-wire terminal block ......35 Welding flange version ......21 Welding socket version .
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Declaration of Hazardous Material and De-Contamination Please reference the Return Authorization Number (RA#), obtained from Endress+Hauser, on all paperwork and mark the RA# clearly on the outside of the box. If this procedure is not followed, it may result in the refusal of the package at our facility.