Positive Displacement Flow Meters

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High Accuracy Electronic Positive Displacement Flow Meter for Petroleum & Fuel Transfer

High-Accuracy Electronic Positive Displacement Flow Meter for Petroleum & Fuel Transfer Applications

Accurate liquid measurement is a critical requirement in petroleum handling, fuel distribution, and industrial fluid management. The M-XXE Series Electronic Positive Displacement Flow Meter is developed to meet these demands by delivering consistent, volume-based measurement regardless of flow fluctuations or liquid viscosity.

Unlike velocity-type flow meters, this series measures liquid by physically dividing the flow into fixed, repeatable volumes. This makes it especially suitable for fuels and oils where precision matters most. In different parts of the world, this type of product is commonly known by various names, such as Positive Displacement Flow Meter in Europe and North America, Fuel Transfer Meter in the Middle East, Diesel Flow Meter in Africa and South Asia, or simply Oil Meter in Southeast Asia and Latin America.

The M-XXE Series is designed for stable performance in real operating conditions. Its internal multi-rotor structure creates continuous sealing between upstream and downstream liquid, ensuring reliable measurement even when pressure or flow rate changes. This makes it an ideal solution for oil depots, tank truck loading systems, fuel terminals, and industrial liquid transfer processes.

One of the most important advantages of this series is its fully electronic configuration. Instead of a traditional mechanical counter, the M-XXE flow meter is equipped with an Electronic Register and an Electric Control Box. This electronic system provides clearer readings, higher long-term reliability, and easier integration with modern control or management systems. For automated fuel loading and digital monitoring environments, this is a significant improvement over mechanical meters.

From a global application perspective, the M-XXE Series is widely used for measuring gasoline, diesel, kerosene, fuel oil, ethylene glycol, lubricating oils, and other refined petroleum products. In commercial fuel transfer, it is often referred to as a Fuel Metering System; in industrial environments, it may also be called a Liquid Transfer Flow Meter or Industrial Oil Meter, depending on regional habits.

To support long-term accuracy and safe operation, the M-XXE Series is commonly supplied as a complete metering unit, including filtration, air elimination, electronic display, and electrical control components. This integrated design simplifies installation, improves system reliability, and reduces maintenance effort over the product’s service life.

Overall, the M-XXE Series Electronic Positive Displacement Flow Meter is a modern, internationally applicable solution for customers seeking high accuracy, electronic measurement, and dependable performance in fuel and liquid transfer applications. It is well suited for global markets where precision, durability, and digital compatibility are essential.

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The M-XX series meter is a positive displacement meter for liquids. They are designed for liquid metering, both in transfer and process control applications. Thanks to their design, they are easy to keep and can suit a wide range of applications. The meter consists of a housing where two bladed displacement rotors and a central single blocking rotor turn in a synchronized relationship within three cylindrical bores with no metal-to-metal contact within the meter element. Each rotor is supported on either end by a bearing plate through which the rotor shafts protrude.

The bladed displacement rotors alternately move through the two half-cylinder bores of the meter element, while the single blocking rotor rotates within its bore in such a way as to produce a continuous capillary seal between the unmetered upstream product and the metered, downstream product. At one end of each rotor shaft is a timing gear. The blocking rotor gear, having twice the number of teeth of each of the displacement rotor gears, rotates at half the RPM of the displacement rotors.

M-XXE Positive Displacement Flow Meter, including the following equipment:

  1. Meter Body
  2. Strainer
  3. Air Eliminator
  4. Electronic Register
  5. Electric Control Box

Class 1 Application: used for refined petroleum products, such as gasoline, fuel oil, diesel fuel, kerosene, etc.


Technical Specification:

Model No

M-40E

M-50E

M-80E

M-100E

Flow Range

25-250L/min

38-550L/min

75-1150L/min

130-1700L/min

Volume/Rev.

0.309L

0.681L

1.839L

5.102L

Repeatability

≤0.05%

Accuracy

±0.2%

Standard Measurement

Liter/U.S.Gallon/lMP Gallon

Viscosity

30-1500000SSU

Max Pressure

10ar/150PSl

Note: When placing an order with us, please inform us what liquid the flow meter will be used for, the working pressure and working temperature, so that we can provide the correct additional equipment for this flow meter.

Application:
Class 1 meter: refined petroleum products, such as gasoline, fuel oil, diesel fuel, kerosene, ethylene glycol, motor oils and rotogravure ink.

About Haibo
Zhejiang Haibo Petroleum Equipment Co., Ltd.

Zhejiang Haibo Petroleum Equipment Co., Ltd., established in 2017, is a certified enterprise located in Yongjia County, Wenzhou City, Zhejiang Province—recognized globally as the world’s largest manufacturing base for petroleum equipment and the well-known hometown of pumps and valves in China.
Our products are widely used in Fluid Control Systems, Energy Systems, Measurement Systems, Piping Systems, and Hydraulic Systems, serving petroleum companies, military units, oil depots, tank truck manufacturers, and petrol stations worldwide. Province—recognized globally as the world’s largest manufacturing base for petroleum equipment and the well-known hometown of pumps and valves in China.
At Haibo, we are backed by a team of senior industry experts with more than 20 years of professional experience in the petroleum equipment and fluid control sectors. Their deep technical knowledge and industry insight ensure that every product and solution we deliver meets the highest standards of quality, reliability, and performance.

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