Vortex Flowmeter

Vortex flowmeter is a flowmeter used to measure the velocity of fluid in a closed pipe. It’s a broad-spectrum flow meter which can be used for metering, measurement and control of most steam, gas and liquid flow for a very unique medium versatility, high stability and high reliability with no moving parts. The vortex flowmeter is relatively economical because of its simple flow measurement system and ease of maintenance. It is widely used in heavy industrial applications, power facilities, and energy industries, particularly in steam processes

It has the following distinguishing advantages:

Working Principle

When the medium flows through the Bluff body at a certain speed, an alternately arranged vortex belt is generated behind the sides of the Bluff body, called the “von Kármán vortex“. Since both sides of the vortex generator alternately generate the vortex,the pressure pulsation is generated on both sides of the generator,which makes the detector produce alternating stress. The piezoelectric element encapsulated in the detection probe body generates an alternating charge signal with the same frequency as the vortex, under the action of alternating stress. The frequency of these pulses is directly proportional to flow rate. The signal is sent to the intelligent flow totalizer to be processed after being amplified by the pre-amplifier.

Key Feature

  • Wide range of application, the flow of steam, gas and liquid can be measured
  • Wide measuring range, up to 1:10 range ratio.
  • The inner diameter of the vortex flow sensor is 25-300mm (full tube)
  • Plug-in vortex flow sensor application inner diameter range is 350-1200mm (plug-in)
  • The accuracy of measuring liquid with full tube is 1%, and the accuracy of measuring steam and gas is 1.5%
  • The measured medium temperature is -20~150℃, -40~250℃, +100~350℃ (tube only). The output signal is three-wire voltage pulse, three-wire system 4-20mA, two-wire system 4-20mA.
  • Within a certain Reynolds number range, the output signal frequency is not affected by the fluid physical properties and composition changes. The meter coefficient is only related to the shape and size of the vortex generator. No compensation is required when measuring the fluid volume flow, and it is generally not necessary after changing accessories Recalibrate the meter coefficient

Application Range

Vortex flowmeters are suitable for a variety of applications and industries but work best with clean, low-viscosity, medium to high speed fluids. Some of the main uses include:

Technical Specification