FMD-NT-V V-cone flowmeter is a new type of throttling device that integrates the advantages of the classic venturi tube and the annular orifice. It uses the throttling effect produced by the V-shaped cone in the flow field to measure the flow rate which is different from other throttling flowmeters. , It changes the throttling layout, from the central hole throttling to the annular throttling, the trailing edge of the cone produces small vortex, the negative pressure side output is stable the fluctuation is small, and the stability is good. Its theoretical basis is based on the conservation of energy in the closed pipe The law of Bernoulli equation and flow continuity equation, in the case of steady flow, the flow rate in the pipeline is proportional to the square root of the pressure difference. The V-cone flowmeter has good stability, high accuracy, good repeatability, and wide range ratio. The installation pipe section has low requirements and low pressure loss. It can measure fluids containing solid particles, low-pressure fluids, high-humidity gases and various dirty fluids.

Parameter :

Nominal diameter




Reynolds number range


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

The measuring range can reach 1:10, with special means, the measuring range ratio can reach 1:65.

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

Length of straight pipe section

1~3D for front straight pipe, 3~5D for rear straight pipe