PD petroleum flowmeters Positive Displacement flow meters - Petrol Metering Systems

<body> <p><a href='http://spazioinwind.libero.it/petrolms/index.htm'><h1>Positive Displacement flow meters for volumetric measurement of liquids - Petrol Metering Systems</h1></a><p> <p><a href="http://spazioinwind.libero.it/petrolms/pdm.htm">Petrol PD flowmeters</a> are volumetric instruments for direct measurement of flowing liquids such as petroleum. Positive Displacement flow meters allow an accurate measurement either of the flow rate either of the volumes flown of practically all the liquids industrially utilized.</p> <p>Petrol PD flowmeters are <a href="http://spazioinwind.libero.it/petrolms/prod.htm">volumetric instruments for direct measurement of flowing liquids</a> such as petroleum. Positive Displacement flow meters allow an accurate measurement either of the flow rate either of the volumes flown of practically all the liquids industrially utilized. "Petrol" PD flowmeters are typical volumetric instruments which directly measure the quantity of flowing liquid by means of a couple of rotors. These instruments allow an accurate measurement either of the flow rate either of the volumes flown (integrated flow rate) of practically all the liquids industrially utilized. They may be used for custody transfer purposes, operating controls and for the many other needs of the petroleum, chemical, pharmaceutical industry, etc. The two rotors, engineered and manufactured in such a way they never touch each other nor the measuring unit components, are alternatively driven by the timing gears coupled on rotor's shaft just outside the measuring chamber. As show in the operating scheme, the liquid flowing inside the PD flowmeter pushes the rotor on the right , which is in condition of unbalanced pressure, to rotate clockwise; contemporarly the rotor on the left, being driven by the timing gears , is forced to rotate counterclockwise. After a 90 degrees rotation, the rotors are in a reciprocal position when compared to the initial one and therefore it is the rotor on the left which, pushed from the liquid, rotates counterclockwise driving, through the timing gears, the rotor on the right. During the operating cycles the volumes which are generated between the rotors and the components of the measuring chamber determine the "base volume" of the instrument .A complete rotors' rotation generates four "base volumes". By transmitting the number of rotors' rotations to the register the volume flown through the PD flowmeters is displayed.</p> <p>"PETROL" is the unique european maker who has developped the Roots principle for the volumetric measurement of liquids. Since its commercial debut this PD flowmeter has contributed to the automation and modernization of the industrial processes for its reliability and its exceptional operating characteristics coupled with a very high manufacturing technique. "PETROL" PD flowmeters are today available for the measurement of all the liquids industrially used in a range of models so wide, either in the standard version either in the jacketed version, to meet, even contemporarly, operating specifications as severe as: · max operating pressures till over 150 BAR; · max operating temperatures till over 250 °C. · flow rate ranges from few hundred of litres/hour to 1800 m3/h, with equipment sizes from 1 to 16". Several manufacturing and operating features, hereinafter evidenced, have permitted to "PETROL" PD flowmeters to be considered a practically unreplaceable equipment in many fields of application and have also allowed its use in many different industrial sectors. A) Double case construction The measuring unit is removable, as a single subass'y, from the outer housing flanged to the piping and may be maintained as well as functionally rechecked independently from the outer housing. B) "Floating" type rotors Rotors never touch each other but are synchronized from the timing gears mounted outside the measuring chamber. Rotors are not therefore subject to wear and PD flowmeter does not need re-calibration with the time due to wearing. C) Constant profile cutters for rotors machining This type of rotors machining permits to realize, between the PD flowmeter "base volume" components, "tolerances" or "clearances" suitable for the accurate measurement either of extremely viscous liquids either of mediums at high operating temperatures. D) Construction materials Any type of construction material may be used as aluminum, cast iron, carbon steel, stainless steel in the various grades available and plastic materials as "moplen" either for the measuring unit either for the outer housing flanged to the piping, in accordance to specific needs. E) Magnetic transmission With this type of movement transmission, used in the majority of equipment produced, the sealing between the wetted parts and the dry parts of PD flowmeter is of static type which fully guarantees against any leakage of the flowing liquid. F) Excellent accuracy ±0,2% of reading for custody transfer purposes, ±0,5% of reading for general purposes, anyway in accordance with the specific approvals issued by Italian Ministery of Industry and Commerce for their use in Italy and in the European Common Market Countries. G) Long life and very reduced maintenance Rotors never touch each other and therefore are not subject to wear. More over double case construction allows to maintain the measuring unit without removing the entire PD flowmeter from the line. H) Wide range of ancillary equipment Electronic or pneumatic pulse transmitters and frequency to current converters are available for remote totalization, recording and presetting of metered volumes. Local or remote preset counters, both with one or two stages closure cycles, togheter with automatic temperature compensators, mechanic or electronic type, complete the range of PD flowmeter ancillary equipment. All the range of protective devices such as strainers, deaerators, max flow limiting and one or two stages closures valves are also available. During the years "PETROL" has accumulated a very strong experience in the production of PD flowmeters suitable for the heaviest operating conditions in the more different industrial fields such as: the measurement of blood, of phtalic and of maleic anhydride, of crude oil on well-heads and of heavy oils at high temperatures. Such a technical background and the investments yearly destined to the research in the field of the volumetric measurement of liquids have till now satisfied each particular need of the customers. Hereinafter are listed the most significant references for crude oil extration industry and for power generation plants.</p> <p> The pictures presented show some of the most significant applications of “Petrol” PD meters and of relevant calibration devices in different industrial sectors such as crude oil extraction industry , ships making industry and fuels delivery in airports and depots loading areas. Are also presented several pictures of the training courses periodically carried-out at Petrol factory for Italian and foreign customers either from a general standpoint either for the operation and servicing of PD meters supplied for specific plants such as that made to technical people of Tian-Jin steel making plant in China. ( the picture relevant to this course is quite interesting also for a communication stand-point because of being the English spoken by the Chinese very hard to be understood by us the system found to understand the questions of the customer and to have our replies understood was to write both the questions and the replies on a blackboard).</p> <p>P. M. S. BACKGROUND, HISTORY AND DEVELOPMENT PROGRAMS The present <a href="http://spazioinwind.libero.it/petrolms/his1.htm">Petrol Metering Systems</a> is the ultimate step of a way three (3) decades long which has brought a young engineer of “belle speranze” to be the sole owner of a manufacturing Company. In other words is the finalization of the working life of Mario Romiti and contemporarly of the set-up in Italy of the production of Positive Displacement meters (PD meters) for the most accurate measure of liquids transferred through pipes. The more significant events of this carrier are shown in the attached pictures where they are sequentially illustrated. The A.O. Smith (one of the greatest american manufacturer of PD meters) graduation released in the Erie , Penna; factory during the 1967;</p> Petrol Metering Systems S.r.l. ADDRESS Office and factory: Via del Commercio, 24 04011 Aprilia (LT) ITALY C.F.: 06381091005 - P.I.: 02068390596 PHONE & FAX Phone: ++39.06.92062306 ++39.06.9282108 ++39.06.9281796 Fax: ++39.06.92850590 INTERNET Info and general contact petrolms@petrolms.it Dott. Ing. Mario Romiti mario.romiti@petrolms.it Dott.ssa Silvia Romiti silvia.romiti@petrolms.it WEB <a href="http://www.petrolms.it/">www.petrolms.it</a> </p> </body>