When it comes to measuring the overall volumetric flow rates for liquid matter, nothing works better than flow meters that are used in varied applications pertaining to different operational fields. The smaller these clearances are, relates to how high the accuracy will be. In this video, adam breaks down the different types of positive displacement pump. Positive displacement flow meter calibration youtube.
Different types of pumps positive displacement pumps. Aug 25, 2014 posted in positive displacement flow meter on august 25, 2014. The cyclic nature of a positive displacement meter lends itself well to total gas quantity measurement and not just flow rate, as the mechanism may be coupled to a mechanical counter which is read by utility personnel on a monthly basis. The blancett model 900 positive displacement flow meter is an economically priced, high pressure flow meter for low viscosity liquids the model 900 meter was designed for water flood and oil field service. Understanding how a positive displacement flow meter works. Applications include lubricants, fuels, chemicals and solvents, oils and greases. The movement of gear is measured by means of a pickup sensor located in the cover. Positive displacement meter installation, commissioning. Positive displacement pd flow meters measure the volumetric flow rate of a moving fluid or gas by dividing the media into fixed, metered volumes finite increments or volumes of the fluid. Menon, in transmission pipeline calculations and simulations manual, 2015. Positive displacement type flow meter applications of positive displacement meters. Rotation is detected through the chamber wall by a hall. Other positive displacement flowmeters output pulses that can be used by a secondary electronic device to determine the flow rate. Flow measurement and control system in oil gas industry 23 of 33 turbine meters can be provided with an electronic flow ratecumulative flow readout mounted either.
The blancett positive displacement flow meter provides high measurement accuracy for fluids over a wide viscosity range. Jul 03, 20 a 15 second video demonstrating positive displacement flow meter calibration for a low flow oil application. A meter prover is a device used to verify flow meter uncertainty in order to establish. The major disadvantage of piston positive displacement pumps is. This positive displacement flow sensor switch with display is designed for philadelphia map pdf use in slighly viscous.
Flowserve positive displacement pumps comply either with asme or api standards. A mas s flow meter operating on the corioli s principle c ontain s a v ibra ting tube i n which a fluid flow caus es changes i n frequen c y, phase s hift or am plitude. Principle of operation flow meters and flow computers. Multipulse pd flowmeters utilises the widely accepted oscillating piston design principle with the performance enhanced by the use of modern engineering materials to provide a cost effective and reliable solution for a wide range of industrial flow measurement applications. No other technology can achieve such accuracy because measurement becomes inferred, which is indirect and subject to assumption. Nutating disc meters are one of the most common types of positive displacement flow meter. Positive displacement flow meters are the only flow measuring technology to directly measure the volume of fluid that passes though the flow meter. Macnaught positive displacement flow meters flow rate range selection chart figure 4.
Positive displacement flowmeter technology flowmeters. The ftb3000 series of positive displacement meters incorporates smooth oval rotors in their design. Every cycle of the meters mechanism displaces a precisely defined positive quantity of fluid, so that a count of the number of mechanism cycles yields a precise quantity for the total fluid volume passed through the flow meter. Mar 23, 2018 positive displacement flow meters are the only flow measuring instrument that can directly measure the volume of liquid passing though the flow meter. The pd flowmeter must be mounted with the rotor shafts in horizontal position. Positive displacement flow meters are the only flow measuring instrument that can directly measure the volume of liquid passing though the flow meter. Positive displacement flowmeters are some of the most accurate flowmeters available today. Positive displacement metering gear pumps positive displacement gear pumps operate. In certain applications, a manual reset feature is desirable. Positivedisplacement meters provide high accuracy, 0. Lessons about positive displacement flow meters omega. This positive displacement flow sensor switch with. A conversion coefficient k factor, available in the instruction manual of the.
Flow meter resources flow meter application advisor. The force of the liquid moving through the flowmeter drives the measuring gears. Introduction to positive displacement flowmeters pd. Positive displacement meter an overview sciencedirect topics. Gear pumps are generally operated at high speed and thus give a fairly pulsefree discharge flow and pressure. Understand the basic principle of operation of an obstruction type flowmeter. Vortex technology yields a meter with no moving parts to hang up or wear. Positive displacement meter an overview sciencedirect. Positive displacement flow meter, jsn positive displacement. Positive displacement flowmeters differ from positive displacement pumps only in that, rather than being driven by motors, they are driven by the fluid flowing through them. Microflow positive displacement meter is ideal for flow measurement of low and medium viscosity fluids solvents, polyurethanes, oils and other nonabrasive fluids at very low flow rates, as in chemical injection. Flow direction is marked with an arrow on the flow meter. Flow positive displacement flow meter, mass flow meter. Positive displacement flowmeters, although simple in principle of operation and widely used in the industry, all cause a.
A new range of lowcost positive displacement flowmeters, based on the oval gear principle, has been introduced by flotech solutions ltd of arden business centre, horsfield way, bredbury industrial. Rz2au utility positive displacement flowmeter andersons rzu series flowmeter is a utility version of the industry accepted accurate rz series sanitary flowmeter. Orifice meter is a flow measuring device used for calculating the pressure drop,flow rate and behaviour of the fluid moving through the pipe. Some positive displacement flowmeters have mechanical registers that show the total flow on a local display. Liquid controls mseries rotary motion positive displacement pd meters offer the ultimate in measurement accuracy for custody transfer of petroleum products, aviation fuels, lpg, and a broad range of industrial liquids.
Positive displacement flow meter what it is and how does. A positive displacement flow meter is a cyclic mechanism built to pass a fixed volume of fluid through with every cycle. Product description and principle of operation aw gear meters positive displacement gear flow meters are similar in design to the gear. They cover gear, screw and reciprocating pumps in different configurations that guarantee reliable and efficient. Rz sanitary positive displacement flowmeter the rz series positive displacement flowmeter is the solution to applications requiring precision flow measurement from a sanitary design. Positive displacement flow meters directly measure the volume of fluid that passes though the flow meter. You can measure flow through a variety of different devices such as coriolis, differential pressure, vortex, magnetic, ultrasonic, turbine and positive displacement meters, flow technology advisor. It is recommended to operate the flowmeter only within the flow rate limits specified in the nameplate. Gear flow meter vhm series they are positive displacement units based on the meshing gear principle. Rotating positive displacement flow meters one of the main benefits of using a pd flow meter is the high level of accuracy that they offer, the high precision of internal components means that clearances between sealing faces is kept to a minimum.
Data logging of gas mass flow rates with up to 3800 data points. This reliability, coupled with a large turndown range, offers an affordable replacement for older turbine technology. Check that actual flow direction is the same indicated by the arrow stamped on the flowmeter outer housing andor is in accordance to the in and out nameplates attached to the inlet and outlet flanges of the flowmeter itself. Micro motion coriolis flow and density measurement 76,825 views. With only 2 moving parts, the positive displacement meter offers trouble free operation and long service life. Understanding how a positive displacement flow meter works azom. The measuring chamber of the isolv birotator positive displacement flowmeter consists of a body, a pair of rotor gear and a top cover. These meters achieve this by trapping small amounts of fluid between rotating components within a high precision chamber.
To achieve the designed accuracy and ensure that the positiive displacement flowmeter functions properly, a filtration system is required to remove particles larger the 100 m as well as gas bubbles from the liquid flow. What is the thermal mass flow meter working principle. The t10 family of positive displacement water meters utilizes a nutating disc measuring chamber. Positive displacement flowmeters can be applied to clean, sanitary, and corrosive liquids, such as water and foods, and some gases. They operate by having a disc mounted to a central ball. A rotary gas flow meter is shown in the following photograph. Pump maintenance michigan water environment association. Positive displacement flowmeters chemical engineering. By directing the fluid to mechanically displace components in the meter in order to measure its flow as discreet parcel volumes. Apollo flow measurement ltd flowmeters,flowmeter, flow meter, flow meters, flow indicator and flow indicators to meter water, liquid, liquids, oil, gas, air, chemicals. Screwtype flow meter svc 1 housing 2 measuring system screw spindles 3 bearing roller contact bearing 4 sensing wheel and sensors 5 seal oring 6 connection screwtype flow meters belong to. Because they are used for domestic water measurement, piston meters, also known as rotary piston or semipositive displacement meters, are the most common flow measurement devices in the uk and.
The brooks bm01 and bm02 are low flow positive displacement oval flowmeters designed for applications requiring the high accuracy measurement of clean liquids with viscosities less than cp. The working principle construction, calibration etc. A positive displacement meter is a type of flow meter that requires fluid to mechanically displace components in the meter in order for flow measurement. Usually best applied when high accuracy is required at a reasonable price. What is the working principle of orifice meter answers. They are used in high viscous, dirty fluid which does not flow through the straight conduit. Liquid controls mseries rotary motion positive displacement pd meters offer the ultimate in measurement accuracy for custody transfer of petroleum products, aviation fuels, lpg, and a broad. Flow meter used in petrol pumps student cheresources. A conversion coefficient kfactor, available in the instruction manual of. Positive displacement flow meters are essentially apt for measuring volumetric flow rate of the liquid or gas that helps in mechanical displacement of components that are present inside the meters. Product description and principle of operation aw gear meters positive displacement gear flow meters are similar in design to the gear pump. Each tooth generates an impulse by recognition of the gear rotation by a noncontact.
Positive displacement gear flow meters can be installed either a horizontal or. Units are available with a pulse output from a reed switch or solid state hall effect switch for remote registration andor totalization. The frequency of the sensor is proportional to the velocity of the fluid and is amplified and converted to a 4 to 20 ma output signal. This positive displacement flowmeter with dis play type 8076. These are also considered ideal for applications which require use of a simple. S vs flow meter vs positive displacement flow meters are volume rate measuring sensors based on the meshing gear principle and are designed for use with liquids. It achieves this by trapping pockets of fluid between rotating components housed within a high precision chamber. You dont really need to know the formulas and science behind the scenes but hopefully, in this video, we will give you some. One of the main benefits of using a pd flow meter is the high level of accuracy that they offer, the high precision of internal components means that clearances between sealing faces is kept to a minimum.
They are commercially referred to as bulkmeters and are particularly suited to applications such as aviation refuelling, ship bunkering, tank calibration, engine test rigs, proving other forms of metering, and blending processes. What are the major applications of a positive displacement. Positive displacement meter installation, commissioning and calibration in the field slideshare uses cookies to improve functionality and performance, and to provide you with relevant. Positive displacement flowmeters hpi series pd meter the patented, highly accurate flow technology hpi series positive displacement flowmeter pd meter is ideal for liquid flow applications where process pressure is above 1,000 psig. The liquid stream is divided into the fixed volume cavities between the gear teeth and metering body. Dec 05, 20 how to repair replace broken circuit breaker multiple electric outlet not working fuse box panel duration. You can measure flow through a variety of different devices such as coriolis, differential pressure, vortex, magnetic. The positive displacement principle is the only accurate method of measuring fluid flow. Applications, advantages and disadvantages of positive. Ppt basic flow measurement powerpoint presentation. Flow meter used in petrol pumps started by, jan 2007 07. Positive displacement meter is a type of flow meter that requires fluid to mechanically displace components in the meter in order for flow measurement.
The data is stored in the portable unit for subsequent transferring to a file. Positive displacement flow meters sparlings inventory of oval positive displacement meters are designed for flow measurement of very small flow rates in applications requiring high accuracy. Series pdm flowmeter outputs reed switch output provides a voltage free contact closure. Recommended for loading and unloading, especially for stripping tanks and piping of product. Portability, with up to 10 hours of rechargeable battery operation. Pdf flow measurement and control system in oil gas industry. Type of flowmeters positive displacement positive displacement meters provide high. A cavity with a known volume is formed and functions as the measuring chamber of the flowmeter. Positive displacement flow meter, master pd flowmeters. Positive displacement flow measurement technology accurately measures the volume of liquid or gas passing through the flow meter. Positive displacement flow meters measure the volumetric flow rate of a moving fluid or gas by way of precisionfitted gears or rotors containing cavities through which precisely known volumes of fluid pass. Positive displacement pd meters are the types of flowmeters which are suitable for measurement of viscous liquid flows.
Each flow meter is calibrated to find its unique kfactor, which is supplied with the flow meter when purchased. Series pdm flowmeter principle of operation the series pdm flowmeter uses the oscillating piston principle where the passage of liquid causes a. Apr 09, 2014 posted in positive displacement flow meter on april 9, 2014. The oval rotor principle has proven to be a reliable and highly accurate method of measuring flow. Positive displacement flow meter, master pd flowmeters, preset batching flowmeter, tank truck loading flowmeter, manufacturer, pune, maharashtra, india. Positivedisplacement meters, as their name implies, respond directly to movement of liquid and are capable of measuring flow rate to an accuracy better than 0. The rotary gas meters are positive displacement meters,desi gned to measure quantity of gas, for custody transfer or technical measurement applications. Microflow low flow spur gear flow meter measuring accuracy. These robust positive displacement fluid flow measuring devices are available in a wide variety of configurations and options including digital displays. The blancett b1750 positive displacement gear flow meters are similar in design to the gear pump. Gas flows by the heated flow sensor and molecules of the gas transport heat away, the sensor cools, and energy is lost.
The positive displacement volumetric pump can pull and push product through a piping system. Flow measurement is the process of measuring fluid in your plant or industry. Positive displacement flow meters sparling instruments. Direct mass flow measurement of any gas with actual gas calibration. The fpd2000 series represents a positive displacement meter that is affordable and accurate. Positive displacement flow meter description our positive displacement flow meter is a kind of oval gear flow meter,along to positive displacement flow meter. A positive displacement pump makes a fluid move by trapping a fixed amount of the fluid and forcing displacing that trapped volume into a discharge pipe or discharge system. About positive displacement flow meters instrumart. Impact of viscosity and flow range on meter accuracy accuracy % for viscosities greater than cps.