FOB Price
Get Latest Price250 ~ 1000 / Piece
|1 Piece Minimum Order
Country:
China
Model No:
HLUG
FOB Price:
250 ~ 1000 / Piece Get Latest Price
Place of Origin:
-
Price for Minimum Order:
250 per Piece
Minimum Order Quantity:
1 Piece
Packaging Detail:
Carton or plywood case
Delivery Time:
In a week
Supplying Ability:
50 Piece per Day
Payment Type:
T/T, L/C, PayPal
Product Group :
-
China
Contact Person Mr. ji
LICHENG, Huaian, Jiangsu
DESCRIPTION OF
PRODUCTS
HLUG series smart vortex
flowmeter is mainly used for measuring flow of industrial pipeline
fluid, such as gas,liquid and steam, etc. It has little pressure
loss, broad span range and high accuracy. It is not under influence
of density, pressure, temperature and viscocity when measuring
volumetric flow. It has no movable mechanical parts with high
reliability and little maintenance.PERFORMANCES &
FEATURES
OPERATION
PRINCIPLES
Setting vortex generation
body (bluff body) in fluid, regular vortexs will alternately
generate from two
sides of vortex generation
body. This kind of vortex is called Karman vortex. See picture 1.
Vortex is at
downstream of vortex
generation body, unsymmetrical array. Set occurrence to be f ,
avarage flow
speed of measured medium U,
face width d and diameter D. According to Karman principle,
exsiting
following relation
:
f = StU1/d =
StU/md
U1 - avarage flow speed at
two sides of vortex generation body, m/s
St - Strouhal
number
m ratio of segment area and
pipeline cross sectional area
K has relation with vortex
generation body, pipeline dimension and Strouhal nember. Strouhal
nember is
a parameter without
dimension. It has something to do with shape of vortex generation
body and
reynolds number. Seeing from
the picture, in the range of Re = 2 * **4 ~ 7 * **6, St can be seen
to be a
constant. When measuring gas
flow, flow calculation formula of HLUG is In the formula, Qvn, Q
**- volumetric flow under standard conditions and working
conditions, m3/h ,Pn, P **- absolute pressure under standard
conditions and working conditions, Pa.
Tn, T **- thermodynamics
temperature under standard conditions and working conditions,
K
Zn, Z **- gas compression
coefficient under standard conditions and working
conditions
Seeing from the above
formula, pulse frequency signal output by HLUG is not influenced by
fluid
physical properties and
component changes, that is, instrument coefficient only has
relation with vortex
generation body and dimension
of pipeline in a certain range of reynold number. But the flowmeter
must
measure mass flow in material
balance and energy measurment, here output signal of flowmeter
should
monitor volumetric flow and
fluid density, therefore, fluid physical properties and component
have direct
influence on flow
measurement.
STRUCTURE &
DIMENSION
This series vortex flowmeter
has two types of connection forms and dimension .
MODEL SELECTION & CALCULATION
1. Caliber of flowmeter
should be chosen according to max working flow Qv; to get much
wider working
flow range, max working flow
should be not less than 1/2 of rated max flow Qmax.
Corresponding
reynold number range of
linear flow range is 2 * **4 ~ 7 8***6.
For liquid, please look up in
sheet 2 according to picture 9; for gas please work out flow range
under
working conditions according
to picture *0, looking up in sheet 2.
2. Change flow under standard
conditions into flow under working conditions
(1) Change density ρn under
standard conditions into ρ under working conditions
(2) Calculate flow Q under
working conditions
a. Find out Qv by Qn under
standard conditions
b. Find out Qv by mass flow
Qm
3. Conversion between Dynamic
viscosity μ and moving viscosity v
ρ density under working
conditions (kg/m3)
ρn- density under standard
conditions (kg/m3)
P pressure under working
conditions (MPa)
T temperature under working
conditions (°C)
Qv flow under working
conditions (m3/h)
Qn flow under standard
conditions (m3/h)
Qm mass flow
(kg/h)
Country: | China |
Model No: | HLUG |
FOB Price: | 250 ~ 1000 / Piece Get Latest Price |
Place of Origin: | - |
Price for Minimum Order: | 250 per Piece |
Minimum Order Quantity: | 1 Piece |
Packaging Detail: | Carton or plywood case |
Delivery Time: | In a week |
Supplying Ability: | 50 Piece per Day |
Payment Type: | T/T, L/C, PayPal |
Product Group : | - |