Europump International

Frequently Asked Questions

Answers to frequently asked questions about LPG, petroleum, and natural gas, as well as the entire Europump product range.

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Europump assists its customers with targeted consultations, detailed information, and a team of experts capable of supporting every type of business with personalized services tailored to every need. On this page, you can find answers to frequently asked questions, especially regarding fuel and LPG dispensing products, control units for LPG and other fuel dispensers, and fuel pumps. For any information not covered on this page, you can contact the Europump offices directly for personalized advice.

FAQs on LPG and LPG Distribution

Frequently Asked Questions and information of general interest regarding LPG and its distribution.

  • What is an LPG distributor?

    The LPG dispenser is a machine used for filling liquefied petroleum gas by pulsing it from a side channel, once or several times, until the total volume of the required liquid has been pumped.


    There are mainly three types of LPG dispensers, divided according to their measurement methods:

    • Mechanical LPG dispenser: These LPG dispensers measure the volume of LPG delivered via mechanical gears located atop volumetric meters. Due to expensive spare parts, the difficulty in ensuring temperature compensation, and the automation requirements of the current market, these dispensers are losing popularity.
    • Electronic LPG dispenser with volumetric meters: Electronic LPG dispensers measure the volume of LPG using encoders located atop volumetric meters. Pulse generators translate the mechanical measuring movements into electronic pulses to the dispenser's registers. The registers process these pulses to show whether the volume has been compensated or not on the dispenser's display, according to preset temperature and density values. The dispenser can also communicate with remote forecourt automation systems.
    • Electronic LPG dispenser with flow meter: These dispensers use LPG flow meters instead of volume and pulse meters. The mass measurement system measures the mass and density of the LPG through the "Coriolis effect," allowing the dispenser to display the mass, density, and volume in real time. This technology is the most sophisticated and complex in current models, and is also the most expensive.
  • What are the main points for the first installation of an LPG dispenser?

    First, the distribution station pipes should be nitrogen tested. This way, any problems caused by dust, dirt, and welding fin can be corrected.

    • The pressure in the system should be 9-12 bar under normal conditions. This can be checked using a pressure gauge.
    • The safety valve opens automatically when the pressure reaches 17 bar and maintains the pressure in the pipes.
    • The bypass valve regulates the pressure going to the distribution line.
    • The pneumatic valves must be open when there is no LPG transfer in the line and during tank filling. If the emergency stop button is pressed, both should be closed.
    • The solenoid valve connected to the filling line must be open during filling.
  • Is it possible to perform mechanical calibration for LPG dispensers?

    Yes, Europump meters can be mechanically calibrated.

  • When should filters be cleaned?

    After 30,000 liters, the first filter must be changed. After 100,000 liters, the second filter must be changed. It's also important to calibrate every time you change the filter.

  • How long does an LPG meter last?

    The lifespan of an LPG meter depends on regular cleaning of the filters and the quality of the LPG.

  • What is the operating pressure of the LPG dispenser?

    LPG is in a liquid state above 6 bar, so systems are designed to operate only above 6 bar. Under normal operating pressure conditions, it is between 9-12 bar.

  • What is automatic temperature compensation?

    A liquid is subject to expansion or contraction resulting from temperature variations. If LPG is in a liquid state, its volume also changes depending on the temperature. ATC (Automatic Temperature Compensation) is the technology that automatically corrects the measured volume based on the measured temperature. In accordance with European metrological standards, the volume is converted into liters at the standard reference temperature of 15°C. This allows the distributor to take into account volume changes resulting from temperature fluctuations, and the total volume purchased can be sold. With ATC, "lost liters" are a thing of the past, and you will have unquestionable control over the quantity of fuel.

  • What is LPG?

    Liquefied Petroleum Gas (also called LPG or gasoline) is a mixture of hydrocarbon gases used as a fuel in heating systems and vehicles. It is increasingly replacing chlorofluorocarbons as a propellant for aerosols and refrigerants to reduce damage to the ozone layer.

    Commercial LPG varieties include blends that are primarily propane, blends that are primarily butane, and the most common blends of propane (60%) and butane (40%), depending on the season: propane is more commonly used in winter, while butane is used in summer. Propylene and butylene are also usually present in small concentrations. A powerful odorant, ethanethiol, is added so that leaks can be easily detected according to the international standard EN 589. In the United States, thiophene amyl or mercaptan are also used as odorants.


    LPG is a low-carbon hydrocarbon fuel available in rural areas, emitting 19% less CO2 per kWh than oil, 30% less than coal, and more than 50% less than coal-generated electricity distributed through the grid. Because it's a blend of propane and butane, LPG emits more carbon per joule of propane and less carbon per joule of butane.

Control units for LPG and other fuel dispensers

Frequently Asked Questions about electronic control units used in LPG and other fuel dispensers.

  • Is it possible to have support for electronic calibration?

    Yes, electronic calibration is possible up to ±3%.

  • What are the preset buttons and how do they work?

    The preset buttons are used to dispense the correct amount of liters based on the amount the customer wants to pay. They are especially useful for the pump attendant.

    There are two buttons (one for a high amount of money and one for a low amount of money) for each nozzle number. For example, if you have a double-nozzle dispenser and one display on each side, you will have two buttons on each side.

  • Is it possible to preset values for the amount of money and volume?

    Yes, you can preset the amount of money to fill using the keypad or the preset buttons. However, to preset the quantity per liter, you must use the dedicated keypad.

  • Do the electronics include automatic temperature compensation?

    Yes, this is a default option based on the customer's needs.

  • What does a set of electronic calculators include?

    A set of S4 Pro-B electronic calculators includes:

    • 1 motherboard
    • 1 power supply
    • 1 keyboard
    • 1 totalizer (optional)
    • 2 S4 Pro-B displays
    • 1 ATC probe (optional)

    A set of Pro-C4 electronic calculators includes:

    • 1 motherboard
    • 1 relay unit
    • 1 power supply
    • 1 keyboard
    • 1 totalizer (optional)
    • 2 Pro-C4 displays
    • 1 ATC probe (optional)
  • What types of electronic calculators are used in vending machines and what are their general specifications?

    We are currently using and producing two types of electronic calculators, the S4 Pro and the Pro-B-C4; both are based on the S4 Pro-B, but with improved hardware versions.

    General specifications of both electronic components are:

    • Supports 4 nozzles, 4 displays and 4 electromechanical meters at the same time.
    • WYN-Dart and S4-Dart communication protocols.
    • Ability to work with 110 V or 220 V AC depending on PSU selection.
    • Ability to perform W & M electronic calibration and automatic temperature compensation (ATC - Automatic Temperature Compensation).
    • Error reporting and error path.
    • Password protection of the menu for the manufacturer, pump operator and station administrator.
    • Easy operation with the 2x16 Dotmatrix alphanumeric keyboard.
    • Ability to use different languages. (English and Turkish already included)

Fuel dispenser pumps

Frequently asked questions about fuel pumps.


What is the difference between a suction feeder and a submersible feeder?

  • Fuel dispensers with suction

    These fuel dispensers have a motor and intake system integrated into them, allowing each dispenser to operate independently. This means that if one dispenser experiences problems with the motor or intake line, the others can continue to operate.

  • Submersible fuel dispensers

    This type of dispenser has no motor or suction system included in the frame, so it cannot operate independently. All dispensers in the station rely on submersible pumps on the tank. This system is more suitable for LPG systems, as it is more economical, but if the submersible pump were to fail, all dispensers would cease to function.


    Due to cost and performance issues, most customers prefer to use modern submersible systems.

  • What is a submersible fuel pump?

    A submersible fuel pump is a type of pumping device with a single-piece motor hermetically sealed to the pump body. The entire assembly is submerged in the fuel being pumped. The main advantage of this type of pump is that it prevents pump cavitation, a problem associated with a high elevation difference between the pump and the fuel surface. Submersible pumps pump fuel from the underground tank to the fuel dispensers connected to this line.

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