FMD-XX Wedge Flowmeter

FMD-XX wedge flowmeter is a flow meter that uses a V-shaped throttling element for flow measurement. Its sleek top angle faces downwards, which facilitates the smooth passage of liquids containing suspended particles or viscous liquids without stagnant flow upstream of the throttle. The wedge flowmeter can be used for flow measurement of viscous liquids, and the viscosity can be as high as 500mPaS, used for flow measurement of slurry, ore slurry, sandy crude oil, sewage, heavy oil, residual oil and other solid suspensions and low Reynolds number and other liquid media. It can also be used for the flow of gas and steam media. This product is used for various gases, especially suitable for the flow measurement of dirty gas and natural gas.

Parameter :

Nominal diameter


Reynolds number range

 Red as low as 300, as high as 10

Working temperature


Nominal pressure



0.5 grade, 1 grade

Measuring media

liquid, gas, steam

Connection method

Pipeline flange, butt welding

Flange material

Carbon steel, stainless steel or others

Flange standard

ANSI American standard, DIN European standard

Measuring principle

differential pressure

Signal output

analog 4~20mADC+hart signal, RS485

Range ratio

Variety of styles: common type: the range ratio is in the range of 1:5, and the nonlinear error of the flow coefficient is ≤±1%.

High-performance type: The extended uncertainty of flow calibration within the range of 1:30 is ±0.5% to ±0.2%.

Explosion proof grade flameproof ExdIIBT5Gb; Intrinsic safety ExiallCT4/T5/T6Ga;


±0.2% of the maximum measuring range/12 months

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