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Flow Meter

Positive displacement flow meter

Positive displacement flow meter

A positive displacement flow meter is a device that helps in measuring the flow rate of various fluids. It measures the volumetric flow rates of the fluids. These meters are directly displaced by the fluid force and they in return measure the flow velocity. Due to multiple functions these devices are used widely in different industries, positive displacement flow meter types including oval gear flowmeter, gear flow meter, helical gear flow meter.,etc

Working principal of PD flow meter

The device is made up of a big chamber. A couple of rotors are installed within this chamber that are the key factors in measurement. Lastly, sensors are also part of the manufacturing that help in calculations. As the name indicates, PD flow meters are directly forced by fluid flow. When the device is installed, the flowing fluid moves through it. The force of fluid movement causes the rotation of the gears or rotors of the device. With each rotation, the sensor emits a specific signal. This signal corresponds with the rotation of the gears. The signal is then received by an indicator that also calculated the flow rate in volumes. Thus the more is the fluid velocity, the greater will be the displacement and the greater will be the value of flow rate.

Positive displacement flow meter price

Positive displacement flow meter

PD flow meter price is determined by many factors, such as positive displacement flow meter types, PD flow meters sizes , flow meter material, flow meters functions, whether need mechanical flow meter or also need flow transmitter with 4-20mA analog output or pulse output.However Silver Automation Instruments sell low priced positive displacement flowmeters with very fast delivery time.Because we offer flow meter directly from positive displacement flow meter manufacturers.

Positive displacement flow meter advantages

PD meters possess a number of distinct advantages due to their simple and precise action properties. These may include

  • 1- The PD flowmeter character enables ease of installation. It does not require a potential gradient pipes for its working. This factor favors its wide use.
  • 2- As they work mechanically they do not need a high power supply for working. This saving of power resources is the aim of almost all industries.
  • 3- They range greatly in their sizes and thus different industries can use varying sizes that fit their operations. This range lies between 2mm to 10 inches.
  • 4- Accuracy of measurements is another one of their distinctive features. It is the flow sensor that works directly with fluids. Moreover the bypass and slippage through the gears are very low. The risk loss is also less than 0.5. All this increases their accuracy in measurements, it is high accuracy flowmeter.
  • 5- A wide range of fluids with varying characters, viscosities, and velocities are applicable for measurements. These fluids may include resin, bitumen, fuels, oils, chemicals, and other fluid types. It is a perfect choice for high viscosity fluids flow rate measurement.
  • 6- This device comes up in two forms i.e mechanical and electrical forms. Both these types are used in different industries based on their benefits. Positive displacement flow meter with flow transmitters also with digital display to show passing liquid instant flow and total flow.
  • 7- Low maintenance requirement is another one of its advantages.
  • 8- The device can measure in worse or hard conditions such as high pressure. Some degree of temperature is also withstood able with this device.


Due to their wide range of features and advantages PD flow meters are the choice of many commercial industries. As these meters can measure the fuel, oil, and gas dispensing, they are used in petroleum, petrochemical, and oil-related industries. Natural gas plants also use this meter for liquefied gas dispensing.

  • Sanitary Oval gear flow meterSanitary Oval gear flow meter2019/07/10Hygienic and sanitary oval gear style flow meter is kind of positive displacement (PD) flow meter which can be used in dairy,food processing industry or bio-technology industry; it has two rotating ov...view
  • Digital display type oval gear flow meterDigital display type oval gear flow meter2019/07/09Digital display type oval gear flow meter can have digital display to show fluids instant flow and total flow, besides the electronic display, it can have 4-20mA output, scaled pulse, un-scaled pulse ...view
  • Gear Flow MeterGear Flow Meter2020/04/09Gear flow meter belongs to a kind of volumetric flow meter and can be used for measuring liquid volumetric flowprecisely. The flowing medium makes the gear engage and rotate. Under theflowing e...view
  • Helical gear flow metersHelical gear flow meters2019/11/08Helical gear flow meters are typical volumetric flow measuring instruments which directly measure the quantity of flowing liquid by means of a couple of rotors. It is a kind of positive displacement f...view
  • Oval gear flow transmitterOval gear flow transmitter2020/02/10Oval gear flowmeter is also known as positivedisplacement flowmeter, abbreviated as PD flowmeter. This gear flow meter is withhigher accuracy, especially suitable for measuring the flow of high-viscos...view
  • Oval gear flow sensorOval gear flow sensor2020/02/10Oval gear flowmeter is a very economicaland practical flowmeter that can measure a variety of liquid, including avariety of clean liquids with low, medium and high viscosity. The gearflowmeter has a r...view