Vortex Flowmeter By Addmas Measurements

Relying
on our state-of-the-art manufacturing unit, we are able to manufacture and
supply vortex
flowmeter that
is broadly used in various industrial applications to measure the
flow of gases, water and chemicals.
It is manufactured with the aid of advanced technology using optimum
grade raw material under the supervision of our skilled
professionals. To ensure its high performance at clients end, this
product is tested by our quality inspectors on various parameters.
This product is available in different specifications to meet
the exact needs of our esteemed clients. Offered vortex
flowmeter
can be availed at reasonable rates.

Features:

The principle of operation of vortex flowmeter

Vortex Flowmeter is based on 'Karman'A A Aca A A a A A principle. Flow transmitter is composed of a body with the same nominal diameter and a column with triangular transect. When a column object placed in flowing fluids ( including gas and liquid ) in pipe, a series of vortexes will be generated alternately on each side of the object as shown below ( figure 1 ).

Figure 1 The principle of operation of vortex flowmeter. The frequency of the vortex shedding is proportional to the velocity, and inverse proportional to the width of column.
f=StxV/d (1) Where: f-frequency of Karman Vortex shedding V - flow rate velocity St - Strouhal number D - width of column object From the expressions (1), by measuring frequency of Karman Vortex shedding can get velocity and instantaneousness. By testing, get the Strouhal number St. From frequency f of Karman Vortex shedding, know the velocity, and then get volume flow-rate. Output pulse number in period of time separate volume of fluid (corresponding shift pulses of fluid in unit volume), we call the coefficient of instrument K, which expression is:

K=N/Q (2) Where: K-Coefficient of instrument (Pulse number/ m3) N-Pulse number Q-Volume of fluid (m3) HQ series vortex flowmeter utilize piezo-crystal to measure frequency of Karman Vortex shedding. As the vortex separation on both sides of column, produce pressure pulse, and installed in the cylinder behind in the wake of the probe piezo-crystal in probe feel alternating charge. Convert the alternating charge from piezoelectric unit into voltage. Alternating charge signal output by voltage frequency signal (sensor) after disposed by detection amplifier, or convert 4-20mA standard signal output proportionally with flow.

FLOW RANGES

Chart 2: Flow measuring max limit of some gas (Nm3 /h)* *Standard: T=0, P=1.01325x105Pa Remarks: the unit of flow rate(kg/h,t/h,Nm3/h,Nkm3/h)

MODEL SELECTION AND CODING OF VORTEX FLOWMETER

Vortex flowmeter (VSF) is a kind of the vibration meters. It simple configuration, and install conveniently. It can measure and control various liquid (e.g.: water, oil, petroleum, acid, alkali and different chemical fluids) gas (e.g.: air, oxygen, N2, natural gas, coal gas), and steam (e.g.: saturation steam, overheated water vapor).