Tel
029-83460512 / 15349231350
Krohne Vortex Flow Meter – VFM 1091G
VFM 1091G vortex flowmeter measures the volume flow, volume flow or mass flow of gas, steam or liquid according to the Karman vortex principle.
This product series has two types of explosion-proof type and non-explosion-proof type. Among them, explosion-proof products have been inspected and approved by the National Explosion-Proof Safety Supervision and Inspection Station (NEPSI), and meet the requirements of national standards GB3836.1-2000 and GB3836.4-2000. The explosion-proof mark is Exib Ⅱ CT2-T6, and the products are available in the corresponding explosive hazardous area.
Features：
No mechanical moving parts
The part in contact with the medium is made of stainless steel 1Cr18Ni9Ti and titanium
High measurement accuracy
Unique shock absorption structure design
The diameter of the instrument is DN10-DN200 (3/8"-8")
The clamping connection type is DN25-DN100 (1"-4")
Small diameter DN10-DN20 (3/8"-3/4") with front and rear straight pipe sections
Compact structure and easy maintenance
Wide turndown
Special sealing ring for high temperature type
Can measure volume flow, standard volume flow or mass flow of liquids, gases, mixed gases and steam
Parameters can be corrected online
Clear and easy to read LCD display
built-in accumulator
Flow self-diagnosis function
100% stress test, 100% product verification
Various technical certifications to ensure quality
The calculation software of KROHNE company in Germany guarantees accurate calculation
Air, negative pressure, full scale calibration
Measurement principle：
Vortex flowmeters are used to measure the flow rates of gases, vapors and liquids in pipes. The measuring principle is based on the Karman vortex street. The measuring tube contains a generator behind which a vortex is created. The frequency f of the vortex street is proportional to the flow velocity v. The dimensionless Strouhal coefficient S describes the relationship between the frequency f(Hz) of the vortex street, the width b of the vortex street and the average velocity V(m/s):
f=S*v/b
in:
f: Vortex frequency
v: average flow velocity
S: Strouhal coefficient
b: width of vortex generating body
The sensor detects the frequency f and sends it to the signal converter for calculation, and the flow rate of the medium in the pipeline can be measured.
