Overview

Vortex Flowmeters, Ideal for Steam Flow Measurement

Vortex flowmeters are highly versatile flowmeters that can measure liquids, gases, and steam over a wide range of temperatures and pressures. The advantages offered by this type of flowmeter make them better suited than other types to measuring steam flow. The vortex flowmeters in Yokogawa’s VY Series offer a wide measurable flow range of up to 400mm in connection size, as well as the ability to measure fluids at high temperatures of up to 450°C and high pressures of up to ASME Class 1500. In addition to excellent solidity and stability, the series has been added with remote maintenance and self-diagnostic functions that help ensure efficient maintenance, supporting long-term stability of plant operations and improved production efficiency.

Benefits

This section describes the advantages of using vortex flowmeters for measuring steam flow, comparing them with orifice flowmeters (differential pressure flowmeters), which are used at many work sites.

Wide Rangeability to Accommodate Fluctuating Steam Flow Rate

Low Pressure Loss Helps Ensure Stable Operation

No Mechanical Moving Parts, Less Prone to Failure

Type of body	General Type, Reduced Bore Type (1 or 2 Size Reduction), High Pressure Reduced Bore Type (1 Size Reduction), Dual-Sensor (Welded) Type
Type of shedder bar	General Type, General Type with Temperature Sensor, Long Neck Type, Long Neck Type with Temperature Sensor, High Temperature Type, High Temperature Type with Temperature Sensor, Cryogenic Type
Fluid to be Measured	Liquid, Gas, Saturated Steam, Superheated Steam (Avoid multiphase flow and sticky or corrosive fluids)
Volumetric flow rate accuracy--Liquid	±0.75% of reading
Volumetric flow rate accuracy--Gas/Steam	±1.0% of reading
Connection Size-Wafer	15, 25, 40, 50, 80, 100 mm 1/2, 1, 1-1/2, 2, 3, 4 inch
Connection Size-Flange	General Type: 15, 25, 40, 50, 80, 100, 150, 200, 250, 300, 400 mm 1/2, 1, 1-1/2, 2, 3, 4, 6, 8, 10, 12, 16 inch Reduced Bore Type (1 Size Reduction): 25, 40, 50, 80, 100, 150, 200 mm 1, 1-1/2, 2, 3, 4, 6, 8 inch Reduced Bore Type (2 Size Reduction): 40, 50, 80, 100, 150, 200 mm 1-1/2, 2, 3, 4, 6, 8 inch High Pressure Reduced Bore Type (1 Size Reduction): 25, 40, 50, 80, 100, 150 mm 1, 1-1/2, 2, 3, 4, 6 inch Dual-Sensor (Welded) Type: 15, 25, 40, 50, 80, 100, 150, 200 mm 1/2, 1, 1-1/2, 2, 3, 4, 6, 8 inch
Process connection	Wafer, Flange ASME Class 150 to 1500, EN PN10 to PN100, JIS 10K to 40K
Material	Body: Stainless steel, Nickel alloy, Shedder bar: Duplex stainless steel, Stainless steel, Nickel alloy Gasket: Stainless steel, Nickel alloy
Process Temperature Range	-196 to 450 ℃ Depends on the shedder bar type and material
Process Pressure Limit	From -0.1MPa to the process connection pressure rating
Ambient Temperature Range	-50 to 85 ℃ Depends on the shedder bar type, material and display installed condition
Cable entry	ASME 1/2NPT, ISO M20x1.5, JIS G1/2
Communication and input/output	HART 7 communication, 4 to 20 mA DC, Pulse, alarm, or status output, Analog input FOUNDATION Fieldbus communication Modbus communication, Pulse, alarm, or status output
Conformity Standards	Safety Requirements, EMC, PED, EU RoHS, CE marking, NACE, SIL2, NE21, NE107, ABS, DNV, CRN, Morocco Conformity Mark
Explosion protection	ATEX Ex db/Ex ia, IECEx Ex db/Ex ia, FM Ex db/Ex ia, FMc Ex db/Ex ia, Japan Ex db, Korea Ex db/Ex ia, INMETRO(Brazil) Ex db/Ex ia