Technical Guide DAN-LIQ-Turbine Meter-TG-0807 August 2007 Liquid Turbine Flow Meters Daniel® Liquid Turbine Flow Meter Technical Guide www.daniel.
Technical Guide DAN-LIQ-Turbine Meter-TG-0807 August 2007 TABLE OF CONTENTS Turbine Meter Parameters.............................................................................................................................. 1 The Daniel Series 1200 and 1500 Liquid Turbine Flow Meter Systems......................................................... 2 Turbine Meter Theory.....................................................................................................................................
Technical Guide DAN-LIQ-Turbine Meter-TG-0807 August 2007 TURBINE METER PARAMETERS These five terms are the most widely discussed parameters of turbine meter applications. Linearity is the measure of variation in signal output across the nominal flow range of the meter. The turbine meter will have a nominal K-factor (number of pulses output for a given volume measured) and this value varies across the flow range of the meter.
Technical Guide DAN-LIQ-Turbine Meter-TG-0807 August 2007 THE DANIEL® SERIES 1200 AND 1500 LIQUID TURBINE FLOW METER SYSTEMS The Daniel Series 1200 and 1500 Liquid Turbine Flow Meter Systems combine turbine meters and electronic instrumentation to measure volumetric total flow and/or flow rate. Each Daniel turbine meter comprises of a cylindrical housing containing a precise turbine rotor assembly. The magnetic pickoff, or pickoffs, are mounted in a boss on the meter body.
Technical Guide DAN-LIQ-Turbine Meter-TG-0807 August 2007 TURBINE METER THEORY Daniel® Valves In Load Rack Duty The basic theory behind Daniel’s electronic liquid turbine meters is relatively simple. Fluid flow through the meter impinges upon the turbine blades which are free to rotate about an axis along the center line of the turbine housing. The angular (rotational) velocity of the turbine rotor is directly proportional to the fluid velocity through the turbine.
Technical Guide DAN-LIQ-Turbine Meter-TG-0807 August 2007 Figure 4 - Rotor Assembly Cross Section Patented* Floating Rotor Flowing fluid enters the turbine through the forward suspension. When it encounters the sharp angle of the cone, the stream is deflected outward, increasing in velocity and causing a slight static pressure drop. As the fluid leaves the blade area, flow has redistributed. Velocity is reduced slightly and the static pressure has increased proportionally.
Technical Guide DAN-LIQ-Turbine Meter-TG-0807 August 2007 Surge And Pressure Relief Valves MAGNETIC PICKOFF OF ROTOR VELOCITY The angular velocity of the turbine rotor is taken through the turbine meter wall by means of a magnetic pickoff. The stainless steel meter body is non-magnetic and offers negligible effect on a magnetic field set up by a permanent magnet in the pickoff coil.
Technical Guide DAN-LIQ-Turbine Meter-TG-0807 August 2007 TURBINE METER ROTOR AND BEARING DESIGN The primary differences in turbine meter technology are in the design of the rotor and bearings. The rotor is an assembly of up to twelve (in some designs this number is greater) blades locked into a hub, which rotates on a bearing or bearings. For light liquid applications that require viscosities of 5 cSt or less, and specific gravities of less than 0.
Technical Guide DAN-LIQ-Turbine Meter-TG-0807 August 2007 RIMMED ROTORS FOR HIGHER RESOLUTION In the larger diameter Daniel Series 1500 Liquid Turbine Flow Meter (normally above 6” in line size), the resolution provided by a blade-type motor may be improved by the use of a rimmed (or shrouded) rotor. This construction is standard for Daniel meters of 8” and up.
Technical Guide DAN-LIQ-Turbine Meter-TG-0807 August 2007 DANIEL® SERIES 1200 LIQUID TURBINE FLOW METER Daniel Series 1200 Liquid Turbine Flow Meters are designed specifically for load rack service where a vital characteristic is repeatability. The meter deploys a lightweight rotor which is supported on self-cleaning flow through ball bearings. As a result, the meter is versatile and is particularly suited to batch loading of light hydrocarbons.
Technical Guide DAN-LIQ-Turbine Meter-TG-0807 August 2007 DANIEL® SERIES 1200 LIQUID TURBINE FLOW METER DESIGN FEATURES The following data is applicable for Daniel Series 1200 Liquid Turbine Flow Meter calibrated on mineral spirits. Size (Inches) Standard Extended Standard Extended Standard Extended Flow Range Flow Range Flow Range Flow Range Flow Range Flow Range BBL/Hr BBL/Hr M3/Hr M3/Hr USGPM USGPM 1 8.6 - 86 99 1.36 - 13.7 15.8 6.0 - 60 69 1.5 18.6 - 186 214 2.96 - 29.
Technical Guide DAN-LIQ-Turbine Meter-TG-0807 August 2007 DANIEL® SERIES 1200 LIQUID TURBINE FLOW METER MATERIALS OF CONSTRUCTION Standard Optional 1” and 1.
Technical Guide DAN-LIQ-Turbine Meter-TG-0807 August 2007 DANIEL® SERIES 1500 LIQUID TURBINE FLOW METER The Daniel Series 1500 Liquid Turbine Flow Meter is designed for applications requiring rugged dependability with high accuracy and throughput. Used on pipelines, marine loading and other demanding systems, the internals used are well proven in the Daniel PT meter.
Technical Guide DAN-LIQ-Turbine Meter-TG-0807 August 2007 The deployment of this high resolution rotor in each of the sizes available gives a nominal K-factor twice that of the standard meter and allows for proving with a smaller size prover. The rimmed design is available as an option on 3”-6” turbines, and is standard on 8” and larger. Whatever the design of meter and rotor configuration, the blades are locked and welded into the desired angular position, forming a solid, one piece rotor.
Technical Guide DAN-LIQ-Turbine Meter-TG-0807 August 2007 Nominal K-Factor Size Pulses/BBL Nominal K-Factor Pulses/M3 Pulses/US Gal 1 21,000 (blade) 132,100 (blade) 500 (blade) 1.5 9,660 (blade) 60,766 (blade) 230 (blade) 2 5,334 (blade) 33,553 (blade) 127 (blade) 2.5 2,730 (blade) 17,173 (blade) 75 (blade) 3 2,016 (blade) 4,620 (rim) 12,682 (blade) 29,062 (rim) 48 (blade) 110 (rim) 4 1,000 (blade) 3,000 (rim) 6,290 (blade) 18,864 (rim) 23.8 (blade) 71.
Technical Guide DAN-LIQ-Turbine Meter-TG-0807 August 2007 RANGEABILITY OF LIQUID TURBINE FLOW METERS The flow ranges indicated in the previous tables show a nominal flow range -- with a turndown of 10:1 - at which the turbine will report measurement repeatable to the indicated specification based on measurement of clean liquids such as water (specific gravity 1, viscosity 1 cSt) and mineral spirits (specific gravity 0.78, viscosity 1.8 cSt).
Technical Guide DAN-LIQ-Turbine Meter-TG-0807 August 2007 DANIEL® SERIES 1500 LIQUID TURBINE FLOW METER SPECIFIC GRAVITY ADJUSTMENTS S.G. = 1 ( .7 to 1 ) Meter Size Minimum Linear BBL/Hr M /Hr 3 Maximum Linear USGPM BBL/Hr M3/Hr USGPM 1 10 1.59 7 100 15.90 70 1.5 21.4 3.40 15 214 34 150 2 35.7 5.68 25 357 56.76 250 2.5 57.1 9.08 40 571 90.78 400 3* 100 15.9 70 1,000 159 700 4* 185.7 29.52 130 1,850 295 1,295 6* 420 66.77 294 4,192 667.7 2,935 S.G.
Technical Guide DAN-LIQ-Turbine Meter-TG-0807 August 2007 METER PERFORMANCE IN HIGH VISCOSITY LIQUIDS Increases in viscosity of the measured liquid will reduce the rangeability of the flow meter. Generally, the minimum flow rate of the meter will have to be increased to maintain the linearity rating of the meter.
Technical Guide DAN-LIQ-Turbine Meter-TG-0807 August 2007 INSTALLATION AND OPERATING RECOMMENDATIONS For a turbine meter to perform without increased uncertainty and in a repeatable and accurate manner, the flowing stream must be free of rotational components. The internal assembly supports of a turbine meter offer a slight straightening effect, but additional flow straightening is normally required.
Technical Guide DAN-LIQ-Turbine Meter-TG-0807 August 2007 In some circumstances, the use of a Flow Conditioning Plate (FCP) is possible. The flow conditioning plate is available from 3” to 6” for the Daniel Series 1500 Liquid Turbine Flow Meter, and is standard on the Daniel Series 1200 Liquid Turbine Flow Meter (with the exception of the 1”). When supplied, the FCP is an integral part of the turbine meter.
Technical Guide DAN-LIQ-Turbine Meter-TG-0807 August 2007 TURBINE METER INSTRUMENTATION The turbine pickoff coil has a high impedance and offers only a low voltage output. Transmission of flow signals requires low impedance and high voltage, and so amplification of the pickoff signal is required. Daniel Series 1200 and 1500 Liquid Turbine Flow Meters are supplied with the UMB and a dual channel preamplifier as standard.
Emerson Process Management Daniel Measurement and Control, Inc. World Area Headquarters Houston, Texas, USA T: 713-467-6000, F: 713-827-3880 USA Toll Free 1-888-FLOW-001 www.daniel.com Calgary, Alberta, Canada T: 403-279-1879, F: 403-236-1337 Alberta Toll Free 1-800-242-3197 Sales@Danielind-can.com Service@Danielind-can.
