Browse online, or one of our applications engineers can help you choose the right product for your application. 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. This technology works by directing the fluid to mechanically displace components within the meter to measure its flow as discreet parcel volumes. Positive displacement flow meter pd flowmeter is a system with freelymoving blades used to measure petroleum products such as fuels, biofuels and refined liquid hydrocarbons. Badger meter rcdl nutating disc flow meter positive. The piston movement is transferred by magnetic drive to a straight reading. The rotary positive displacement meter has been in existence for over 75 years. The meter may be installed in horizontal or inclined lines.
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. Positive displacement flowmeters achieve this by repeatedly entrapping fluid in order to measure its flow. There are several types of flow measurement equipment available, which support several. They are normally limited to higher viscosity fluid with very low viscosity liquid or in gas this meter is less accurate because there is more leakage in the internal sealing surface. Additionally, if other mechanical operations or measuring equipment are normally in use in the area, these should be operating during positive displacement flow meter calibrations as well. The aw gear meters jvkg series of positive displacement flow meters is both affordable and accurate. Tms use a bladed rotor contained in a flow tube that is axially suspended in the direction of flow. Mounted to a truck for bulk delivery, high speed batching and unloading, chemical and fertilizer transfer or delivery. Pd meters represent 8% of global sales for flowmeters. Comparison of turbine with positive displacement meters. Oscillatingpiston type f04c non positive displacement phd thesis in project management pdf pumps f04d. Series m and ma positive displacement flow meters overview. Positive displacement flow meters dci series pd meter the patented flow technology dci series positive displacement flow meters pd meter are ideal for a wide variety of liquid flow applications. Install the meter with direction of flow as indicated by the arrow molded in the meter case.
Accuracy a good place to start is understanding the difference between measurement uncertainty and measurement accuracy, since some datasheets use one and some use the other. The mini meter is a positive displacement flow meter best suited for measuring lubrication oils for various kinds of machines and instruments in the management of fuel oil consumption with small oil burner. These are also considered ideal for applications which require use of a simple mechanical meter system. The emphasis will be on the factors influencing the design and performance of the meter for liquid. 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. Understanding measurement uncertainty in power measurement power meter andor sensor. Positive displacement meter diamond key international. Technical paper smith pd meter displacement meters for liquid measurement birotor meter rotating paddle meter oval gear meter figure 1 pd meter measuring elements introduction the purpose of this paper is to examine the positive displacement pd meter. Our ts series meters are the standard in the rotary positive displacement meter category. This sensor will output a highly accurate pulse train or an. Dubois, pennsylvania 15801 introduction a diaphragm meter is a positive displacement instrument which is used to measure the volume of gas that passes through it. Jun 07, 2016 with the largest team of technology experts around the world, emerson is your partner for flow measurement solutions. Positive displacement meter installation instructions the installation instructions detailed below are consistent with recommendations by the american water works association in awwa manual m6, water metersselection, installation, testing, and maintenance.
See flow meter data sheet for specific filter, including mesh weight and size. Positive displacement pdm and turbine tms are the two types of flowmeters acceptable as primary measurement instruments for custody transfer of liquid petroleum products. These meters are of the rotary positive displacement type. That article has nothing unique in it and ought to be a redirect to this title. In this chapter we introduce the tools to identifying the position of the different points and links in a given mechanism. The comprehensive directory provides access to full contact and ability information for sourcing professionals, engineers and researchers wishing to get information on meters. Aw company jvkg series positive displacement flow meter from century control systems, inc. Positive displacement pd meters are the types of flowmeters which are suitable for measurement of viscous liquid flows. The product utilizes a piston that water use rotates in a measuring chamber, each piston revolution being equivalent to a known volume of water. The meter is bidirectional and it has an extremely large turndown ratio, up to. Positive displacement meters series bm 200 bm 400 bm 600 isoil pd meter series bm sizes 3, 4 and 6 offers high accuracy. Positive displacement cold water meters rg3 meter company. A typical positive displacement flowmeter comprises a chamber that obstructs the flow. It achieves this by trapping pockets of fluid between rotating components housed within a high precision chamber.
Output flow will be decreased when system pressure will be increased. Noncontact measurement can now be performed in nanometer resolution. Positive displacement flowmeters for high viscosity fluids. Positive displacement flow meter diesel flow meter. Positive displacement pd liquid meters have long been the standard of measurement for liquid hydrocarbons such as crude oil. The positive displacement principle is the only accurate method of measuring fluid flow. Total control systems is a leading manufacturer of measurement systems. Metering devices positive displacement meters viewing page 1 of 1 9 results view as. Oct 30, 2015 an incorrect flow total will be displayed in the meter if the reverse flow is greater than one meter revolution. Fundamentals and principles of diaphragm meters james thomson sensus metering systems 805 liberty blvd. Aug 09, 2007 a positive displacement meter is only measuring a volume, so the hardness of the water should be irrelevant, unless they are claiming the mechanism can become clogged.
Usually best applied when high accuracy is required at a reasonable price. Positive displacement flow measurement technology accurately measures the volume of liquid passing through the flow meter. Posted in positive displacement flow meter on october 30, 2015. No other technology can achieve such accuracy because measurement becomes inferred, which is indirect and subject to assumption. The smaller these clearances are, relates to how high the accuracy will be. These are also considered ideal for applications which require the use of a simple mechanical meter system. Positive displacement meters results page 1 benmark. Combining the accuracy of positive displacement meters with the reliability and economy of nutating disc technology, the rcdls simple but efficient design is wellsuited for measuring the flow of water and other fluids, hot or cold. They register the volume by counting the number of times a chamber of a known volume is filled and emptied. Liquid controls m15 positive displacement meters 3 npt, 200 gpm, 150 psi liquid controls m15 positive displacement meters offer the ultimate in measurement accuracy.
We supply our customers with a complete product portfolio of water meters, heat meters, gas meters and amrsystems. Positive displacement flow meter positivedisplaceme ntflowmeter. Only fluid that is able to bypass this seal does not get. Positive displacement flowmeter technology is the only flow measurement technology that directly measures the volume of the fluid passing through the flowmeter. In case of non positive displacement pump, flow is not constant but also it varies with variation in pressure. Its simple design with only two pairs of blades and one moving rotor makes it exceptionally robust and allows the user to make significant savings on maintenance costs. Because the force exerted by the fluid flowing through the meter. The blancett b1750 positive displacement gear flow meters are similar in design to the gear pump. Our meters are used worldwide in a multitude of applications including agriculture, aviation, lpg. System variants offer mechanical or electronic registration, hose reel and bulk metering with wet or dry hose delivery options, all of which are certified by uk nwml. This accuracy remains constant during long periods of use. Applications include lubricants, fuels, chemicals and solvents, oils and greases.
The accuracy and repeatability make this ideal for any environment. Figure 1 illustrates some of the most common pd meter measuring elements. Our latest innovation is the mxseries range of products and our original industry standard, the mseries range. The reliability of the rotary positive displacement meter, rangeability, longterm accuracy, and ease of installation, maintenance and testing have made this meter a favorite among gas utilities for billing purposes in industrial and commercial applications. This is accomplished through the known volume that is displaced for each. Orientation positive displacement gear flow meters can be installed either a horizontal or. One primary feature of the aw gear meters jvkg flow meter is the ability to maintain consistent accuracy despite changing viscosity conditions. Positive displacement meter is a type of flow meter that requires fluid to mechanically displace components in the meter in order for flow measurement.
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. Positive displacement flowmeters sanitary industrial. Accurate measurement of liquid flow is of paramount importance to maintain supreme quality of several industrial processes. Positive displacement flow meters houston, tx flowtech. A common use of a flow meter is to ensure the proper amount of product is dispensed to customers. Positive displacement flow meters are the only flow measuring technology to directly measure the volume of fluid that passes though the flow meter. Positive displacement meters series bm 200 bm 400 bm 600. They can be used in very viscous, dark colored fluids. Limitations of positive displacement meters in large pipe diameter pd flowmeters are heavier and expensive than the differential pressure type flow meters. Positive displacement flow meters sparling instruments. In general, a positive displacement flow meter consists of a chamber or cavity which restricts the flow.
Applications, advantages and disadvantages of positive. Find details of companies offering positive displacement meter at best price. They are commonly used in a wide range of applications from domestic water measurement to measuring ultra flow rates of chemical at high pressures subsea. Positive displacement flowmeters are some of the most accurate flowmeters available today. 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. Positive displacement meter an overview sciencedirect. The blancett positive displacement flow meter provides high measurement accuracy for fluids over a wide viscosity range. They are used in high viscous, dirty fluid which does not flow through the straight conduit. These applications include, but are not limited to, paints, resins, petrochemicals, lubricants, fuels, polyurethanes and adhesives.
The meter must be installed in a clean pipe line, free from any foreign materials. The positive displacement metering pdm plus metering system incorporates a precise, finely pitched auger which draws product from a large, flowthrough sump, through a machined metering orifice, then deposits it into the air stream. When water meters were first introduced into the uk there were cases where the meters massively overread. Positive displacement flowmeters for high viscosity fluids well suited for viscous fluids which are difficult to meter with a turbine type flowmeter. You have clicked a page that seems to be very popular. Pdf250 we are one of the best manufacturers, exporters and suppliers of oval gear flow meter with digital display in india. Meter systems alpecos range of truck meter systems combine world renown liquid controls flow meters, with industry proven cargo pumps and dmx gas separators from blackmer. D istinguished as the centrepiece of fmc measurement solutions vast liquid measurement product line, the smith positive displacement meter performs with unsurpassed accuracy and durability combined with high stability, low pressure drop, long service life and ease of maintenance pd meters for petroleum transportation.
These meters incorporate a unique design, presenting minimal intrusion in a flowing stream of liquid, as well as minimal pressure drop through the meter. Its reliability, rangeability, longterm accuracy, and ease of installation, maintenance, and testing have made this meter a favorite among gas utilities for billing purposes in industrial and commercial applications. Importance of proper calibration for product sales. Meter factor variations and factors affecting the accuracy of. Diviser des fichiers pdf en pages individuelles, supprimer ou faire pivoter des pages, fusionner facilement des fichiers. Positive displacement water meters from zenner performance utilize a magnetically driven, positive displacement, oscillating piston design. Smith pd meter displacement meters for liquid measurement birotor meter rotating paddle meter oval gear meter figure 1 pd meter measuring elements introduction the purpose of this paper is to examine the positive displacement pd meter. The badger meter rcdl nutating disc flow meter is an accurate, cost effective solution for metering industrial fluids. A positive displacement flow meter is a cyclic mechanism built to pass a fixed volume of fluid through with every cycle. Positive displacement flow meter pd flow meter manufacturers.
With only 2 moving parts, the positive displacement meter offers trouble free operation and long service life. Fusionner pdf combiner en ligne vos fichiers pdf gratuitement. Positive displacement flow meters are designed for low flow and high accuracy over a wide range of fluid viscosity generally used for thicker liquids. Location its best to install the flow meter upstream from control valves and fluid regulators, if possible. Fusionner pdf combinez des fichiers pdf gratuitement en ligne.
Helical rotor positive displacement meter smartmeasurement. Positive displacement flow meter, master pd flowmeters. With modular construction and extendable with the appropriate accessories and the most up to date systems technology, our products are the first choice in every field of application. The nutating disk meter is another form of positive displacement meter in which the active element is a disk inside a precisionmachined chamber. Hydraulic testing, chemical injection or chemical dosing, pharmaceutical application and similar precision applications. China positive displacement meter, positive displacement. Displacement volumetric meter is the same topic under a different incorrectly capitalized title. Positive displacement flowmeters can be applied to clean, sanitary, and corrosive liquids, such as water and foods, and some gases. The meter is for use in potable cold water up to 120. Positive displacement type flow meter applications of positive displacement meters. The cbro flow measurement industrial oval gear meter is a lowflow, positive displacement flow meter designed for clean fluids. There are many types of internals such as two or three gear oval gear, nutating disc, rotary piston and sliding vane.
It is designed to measure clean potable water only in residential, commercial and industrial settings. Positive displacement flow meters are the types of flowmeters which are suitable for measurement of viscous liquid flows. Specification sheet c700 positive displacement meter. Positive displacement machines pdf combinations of positive displacement and non positive displacement pumps are. From consultation to solution to optimization and beyond, were dedicated to helping you find the right flow technology for your application and business needs. Simplicity of design and construction, together with sustained accuracy, has led to the widespread use of pd series meters within a variety of highly valuable custody transfer. The aforementioned are few of the common problems associated with flow meters. The c700 polymer meter is a positive displacement type meter operating on the oscillating piston principle. Positive displacement flowmeter technology flowmeters. There are a variety of displacement meters that are used.
A displacement meter is a special meter used to measure the flow of fluids using the displacement mechanism of the meter. Liquid flowing into the chamber causes the disk to nutate wobble, and these nutations are. How to calibrate a positive displacement flow meter. Positive displacement flow meter, master pd flowmeters, preset batching flowmeter, tank truck loading flowmeter, manufacturer, supplier, pune, maharashtra, india. Comparison of turbine with positive displacement meters for. Positive displacement flow meters at best price in india.
Abstract the purpose of this paper is to discuss normal meter factor variations which occur in positive displacement meters operating under normal field conditions and those factors which alter positive displacement metering accuracy. Non positive displacement pump are also designated as hydro dynamic pump. Over the years, numerous design improvements have resulted in an expanded product line that now serves industrial as well as petroleum applications. Troubleshooting tips for positive displacement flow meters.
You can try these troubleshooting tips to recoup the operational performance of positive displacement flow meters. Metering through positive displacement has been an accurate and reliable technology used in many parts of the world for decades. Positive displacement cold water meters 58 x 12, 58x 34, 34s,34l, 1, 1 12, 2 model due to continuous research and product enhancement, rg3 meter company reserves the right the change product or system specifications without notice, except to the extent an. Troubleshooting tips for positive displacement flow meters 0 comments. Noncontact thickness metersdisplacement meters electrostatic capacitance type new advances have been made in displacement meters and thickness meters that use electrostatic capacitance, a method which has an established reputation for accuracy and stability. Matching the strainer size or one size larger, with an appropriate size screen will protect the meter and accessories from damage in the system. Rg3s patented positive displacement meters are oscillating piston meters. Centrifugal pumps and propeller pumps are the best example of non positive displacement pump. Smith pd meter displacement meters for liquid measurement.
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. Ideal for many flow measurement applications, including many oil flow applications. 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. This process can be thought of as repeatedly filling a bucket with fluid. These robust positive displacement fluid flow measuring devices are available in a wide variety of configurations and options including digital displays. A positive displacement flow meter measures flow by displacing a precise and known volume for each revolution of their internal parts. Alibaba manufacturer directory suppliers, manufacturers. In general, a positive displacement flowmeter consists of a chamber or cavity which restricts the flow. The speed of the spindles is directly proportional to the volumetric flow rate over a very wide range. Our worldclass positive displacement flow meters are among the most accurate available in any industry and backed by excellent customer service, support and prompt deliveries. A minimum of 40mesh screen is recommended for petroleum service. Positive displacement flowmeters chemical engineering. Introduction to positive displacement flowmeters pd. Master meters design engineer responsible for crafting our mmpd oscillating piston meter is a lifetime member of the american water works association, and the recipient of their coveted george anderson award for his leadership on the awwa standards committee for water meters.
Positive displacement liquid flow meters engineering360. As the global oval gear flow meter technology leader with. Meter requires fluid to mechanically displace components in the meter. Understanding measurement uncertainty in power measurement.
China positive displacement meter manufacturers select 2020 high quality positive displacement meter products in best price from certified chinese meter manufacturers, oil meter suppliers, wholesalers and factory on. Recall that for linkages with one degree of freedom, the position of one link or point can precisely determine the position of all other links or points. Positive displacement flowmeters, also know as pd meters, measure volumes of fluid flowing through by counting repeatedly the filling and discharging of known fixed volumes. Positive displacement manufacturers, service companies and distributors are listed in this trusted and comprehensive vertical portal.
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