Positive displacement meter is a type of flow meter that requires fluid to mechanically displace components in the meter in order for flow measurement. They can be used in very viscous, dark colored fluids. Distributor of positive displacement flow meters such as gas meters. The aw gear meters microflow positive displacement flow meter provides fast and accurate measurement of lowviscosity fluids, such as saline, for flow ranges from 0. The gseries flow metering systems are the combination of a high pressure gear meter and a high resolution, microprocessor based transmitter. Figure 3 assists in interpreting your process flow rate. By directing the fluid to mechanically displace components in the meter in order to measure its flow as discreet parcel volumes. 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. The megapd meter comes with a rugged batterypowered display module that indicates flow rate and totalized flows in userconfigurable engineering units. Simplicity of design and construction ensures unmatched accuracy and trouble free operation over long periods of use. Jul 31, 2012 the dom series positive displacement flowmeter is the preferred choice for measuring viscous liquids such as lubricatinghydraulic oils, diesel fuels, chemicals, solvents, resins, and pastes. Positive displacement flow meter positivedisplaceme ntflowmeter. Positive displacement pd flow meters flow heaters technology overview positive displacement pd flow meters are the only flow measuring technology to directly measure the volume of fluid that passes though the flow meter. Tell a friend about us, add a link to this page, or visit the webmasters page for free fun content.
The smaller these clearances are, relates to how high the accuracy will be. By eliminating the need for highstrength fasteners, flow technologys unique boltless pressure vessel design provides inherent corrosion resistance in a compact, easytomaintain. Series pdm flowmeter principle of operation the series pdm flowmeter uses the oscillating piston principle where the passage of liquid causes a piston to oscillate. 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. Positive displacement flow measurement technology accurately measures the volume of liquid or gas passing through the flow meter. For nearly 20 years, leading companies in technologydriven fields have chosen malema sensors components. Positive displacement flow meters fuel flow measurement. Positive displacement flow meters are designed for low flow and high accuracy over a wide range of fluid viscosity generally used for thicker liquids they can be used in very viscous, dark colored fluids meter requires fluid to mechanically displace components in the meter. Positive displacement flowmeter technology flowmeters. Positive displacement flow meters are designed for low flow and high accuracy over a wide range of fluid viscosity generally used for thicker liquids. 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 thing that sets positive displacement flow meters apart is that it utilizes mechanical components that are shifted by the flow of liquid in order to gauge the rate of the flow of that fluid.
High pressure positive displacement flow meter fti meters. The patented, highly accurate flow technology bl series positive displacement flowmeter is ideal for high pressure applications, such as methanol injection. Positive displacement flowmeters for high viscosity fluids well suited for viscous fluids which are difficult to meter with a turbine type flowmeter. Positive displacement flow meter what it is and how does. The fluid is displaced from the inlet to the outlet via the area between the smooth oval gear and the inner diameter of the meter housing.
Flow meter size macnaught positive displacement flow meters are available in a range of sizes that are engineered to provide high accuracy across a wide turn down ratio. A positive displacement flow meter is a cyclic mechanism built to pass a fixed volume of fluid through with every cycle. Sep 15, 2015 positive displacement flow meter the dom series positive displacement flowmeter is the preferred choice for measuring viscous liquids such as lubricatinghydraulic oils, diesel fuels, chemicals, solvents, resins, and pastes. Liquid controls m and ma series rotary motion positive displacement pd meters offer the ultimate in measurement accuracy for custody transfer of petroleum products, aviation fuels, lpg, and a. Team is available free ofcharge to assist in the specification and identification of a suitable meter. The low pressure drop and high pressure rating means the gm series flow meter is suitable forboth gravity and pump in line applications. Meter body is available in cast iron, case steel, 304ss or 316ss. Positive displacement flow meters omega engineering. 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. Malema sensors is a provider of flow meters, water flow meters, mass flow meters, gas flow meters, turbine flow meters, vortex flow meters, ultrasonic flow meters and flow indicators. Applications, advantages and disadvantages of positive.
A positive displacement flow meter measures flow by displacing a precise and known volume for each revolution of their internal parts. Positive displacement flowmeters achieve this by repeatedly entrapping fluid in order to measure its flow. Rz sanitary positive displacement flowmeter the rz series positive displacement flowmeter is the solution to applications requiring precision flow measurement from a sanitary design. The aforementioned are few of the common problems associated with flow meters. The oval gear meters are positive displacement flowmeters where the passage of liquid causes two oval gears to rotate within a precision measuring chamber. It achieves this by trapping pockets of fluid between rotating components housed within a high precision chamber. They are used in high viscous, dirty fluid which does not flow through the straight conduit. The satam positive displacement meter pd meter is a system with freelymoving blades used to measure petroleum products such as fuels, biofuels and refined liquid hydrocarbons and non corrosive chemicals.
Series pdm flowmeter outputs reed switch output provides a voltage free contact closure. Positive displacement flow meters are devices that are used to measure the flow rate of a substance, most commonly a fluid. The reasons companies standardize on our meters are simple. Positive displacement flow meters are precision made liquid measuring flow meters. Positive displacement type flow meter applications of positive displacement meters. Series pdm flowmeter types of positive displacement meters nutating disc rotating valve oscillating piston oval gear rotating lobe birotor rotating impeller. Positive displacement flow meter flow meter directory. Only fluid that is able to bypass this seal does not get counted, this is. You can measure flow through a variety of different devices such as coriolis, differential pressure, vortex, magnetic, ultrasonic, turbine and positive displacement meters. Positive displacement flow meter guide flow meterswater meters. Every cycle of the meter s 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. Aw gear meters microflow positive displacement flow meter.
Whether you need a single instrument or a complete instrumentation package, siemens is your professional supplier for any project. An incorrect flow total will be displayed in the meter if the reverse flow is greater than one meter revolution. Dec 05, 20 positive displacement flow meter positivedisplaceme ntflowmeter. Series m and ma positive displacement flow meters overview. Positive displacement flow meter calibration youtube. Subminiature oval gear flow meters vzs003alu series flow range q 0,001 0,3 lpm. Hydraulic testing, chemical injection or chemical dosing, pharmaceutical application and similar precision applications. Oct 30, 2015 an incorrect flow total will be displayed in the meter if the reverse flow is greater than one meter revolution. 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. This action is achieved by placing a rotating, oscillating, or nutating obstruction in the path of the fluid flow which moves or displaces an exact quantity of fluid with each cycle.
You can try these troubleshooting tips to recoup the operational performance of positive displacement flow meters. Siemens sitrans flow meter positive displacement pd. Positive displacement flow meters a positive displacement flow meter measures flow by displacing a precise and known volume for each revolution of their internal parts. Siemens sitrans flow meter positive displacement pd rotary piston. Positive displacement flow meters, master pd flowmeter.
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. Jvkg spur gear flow meters datasheet pdf jvkgex spur gear flow meters datasheet pdf jvxxxkg maintenance guide pdf jvxxxkg pressure drop charts pdf pd gear meter manual pdf awlake gear flow metes brochure pdf aw high pressure jvhskg positive displacement round spur gear meter. Our emerson mining advisor applications will be on display. Positive displacement flow meters are the types of flowmeters which are suitable for measurement of viscous liquid flows. Mx series features latest meter technology modular design allows for design flexibility solid billet construction programmable digital display w varied output options mx series data mx06 14 suitable for flow range 0. In general, a positive displacement flow meter consists of a chamber or cavity which restricts the flow. Positive displacement flow meters are frequently specified as they offer high accuracy and repeatability. The design of the fuel monitor utilizes two of aws jvkg positive displacement flow meters, one that meters the supply line and one for the. Positive displacement flowmeter technology is the only flow measurement technology that directly measures the volume of the fluid passing through the flowmeter.
There are many types of internals such as two or three gear oval gear, nutating disc, rotary piston and sliding vane. Series pdm flowmeter types of positive displacement meters nutating disc rotating valve oscillating piston oval gear rotating lobe birotor rotating impeller series pdm flowmeter. Rotating positive displacement 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. Positive displacement flow meter flow meter manufacturers. While gear meters are traditionally based on a design similar to a conventional hydraulic pump, the g series of flow meters has been engineered to increase signal resolution, prevent internal. Liquid controls m and ma series 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. These are available in single, double and triple capsule models to suit applications covering a wide range of flow capacities. Flow measurement is the process of measuring fluid in your plant or industry. Therefore, no liquid passes through the centre cavity between the measurement gears. Exceptional repeatability and high accuracy over a wide range of fluid viscosities and flow rates are features of the gm series flow meter design. Positive displacement flow meters diesel flow meter fuel. A key distinction of positive displacement flow meters is that they offer direct measurement of the volumetric flow rate.
Positive displacement flowmeters operational manual model. Iqs directory is a top industrial directory listing of leading industrial positive displacement flow meter manufacturers and suppliers. Understanding how a positive displacement flow meter works. Positive displacement flow meters control components. The flow through the meter measurement chamber follows the path of least resistance.
Meter requires fluid to mechanically displace components in the meter. Positive displacement flowmeters for high viscosity fluids. Macnaughts positive displacement flow meters are suitable for a wide range of industrial applications including fuel and oil distribution, corrosive chemical or solvent measurement and high pressure applications to name a few. By directing the fluid to mechanically displace components in the meter in. A positive displacement flow meter is an instrument that measures the flow rate of a fluid by allowing it to move through the meter in balanced, known increments. The aw flow meters positive displacement gear flow meters are similar in design to the gear pump.
Positive displacement oval gear flow meters, gear wheel flow sensors. Units are available with a pulse output from a reed switch or solid state hall effect switch for remote registration andor totalization. From truck applications metering refined petroleum products and lpg, to process applications metering a wide range of industrial liquids, their combination of low pressure drop with minimum seal or slippage area offers better accuracy over a wide range of flow than other commercially produced positive displacement flow meters. Positive displacement flow meters are the only flow measuring technology to directly measure the volume of fluid that passes though the flow meter. Troubleshooting tips for positive displacement flow meters. Ideal for many flow measurement applications, including many oil flow applications. Additional positive displacement flow meter manufacturers. These are also considered ideal for applications which require the use of a simple mechanical meter system. Siemens offers a comprehensive range of process equipments for pressure, temperature, flow and level measurement. Its simple design with only two pairs of blades and one moving rotor makes it. These meters achieve this by trapping small amounts of fluid between rotating components within a high precision chamber.
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