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 |
15mm≤DN≤3000mm |
Repeatability |
≤0.1% |
Reynolds number range |
8×103≤Red≤10 |
Nominal pressure |
PN≤6.3MPa |
Accuracy |
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 |