Vortex Flow Meter (GPE F4001)

Specification of

A vortex flow meter comprising: a flow sensor operable to sense pressure variations due to vortex-shedding of a fluid in a passage and to convert the pressure variations to a flow sensor signal, in the form of an electrical signal;and a signal processor operable to receive the flow sensor signal and to generate an output signal corresponding to the pressure variations due to vortex-shedding of the fluid in the passage.

The vortex flow meter is 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, simple structure and low failure rate. 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.

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 Karman 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.

In certain range of Reynolds number(2×10^4~7×10^6),the relationship among vortex releasing frequency, fluid velocity, and vortex generator facing flow surface width can be expressed by the following equation.

 Features

• Compact structure
• With DSP transmitter
• No moving parts, high reliability, thus few on-site
• maintenance is needed
• No direct contact between the sensing element
• and the medium
• Easy installation and maintenance
• Turndown ratio is up to 1:20
• Low pressure drop and operation cost
• High temperature application

 Application

• Sewage Treatment
• Heat Exchangers, Cooling Systems
• Oil Field Metallurgy
• Chemical Industry, Petrol-chemical Light Industry
• Food Beverage Dispensing
• Pharmaceutical Industry
• Process Control
• Other Field Use

 Specification

• Working Pressure: 230psi(16bar)to 4640psi(320bar)
• Medium Temperature: -40 to 572 F(-40 to 300 )
• Power Supply: 12 to 36VDC
• Ambient Temperature: -13 to 140 F(-25 to 60 )
• Relative Humidity: 5% to 95%RH
• Atmospheric Pressure: 0.86 to 1.06bar
• Medium:liquid, gas or steam
• Accuracy: 1% (For liquid), 1.5% (For gas)
• Output: pulse, 4 to 20 mA, RS485