Sizing - YOKOGAWA DY025 User Manual

9.5 Sizing

The following items are the basic specifications.
In case of the definite sizing, it is necessary to check by
the sizing software.
■ Measurable minimum flow velocity
Table 9.5.1 Relationship between Minimum Velocity and
Density (In case of "Gas, Steam", Use the
Large of the Two Values)
Model
Code
DY015 DY025-/R1 DY040-/R2
DY025 DY040-/R1 DY050-/R2
DY040 DY050-/R1 DY080-/R2
DY050 DY080-/R1 DY100-/R2
DY080 DY100-/R1 DY150-/R2
DY100 DY150-/R1 DY200-/R2
DY150 DY200-/R1 ––
DY200 –– ––
DY250 –– ––
DY300 –– ––
ρ : Density at operating conditions (kg/m
Liquid density is 400 up to 2000kg/m
(Note) Reduced bore type (/R1 and /R2) are not available to combine for Cryogenic type (/LT.)
■ Range of measurable flow velocity
Table 9.5.2 Range of measurable flow velocity
Fluid Model Code
DY025- DY040-
/R1 /R2
DY015
up to up to up to
Liquid
DY300 DY200- DY200-
/R1 /R2
DY025- DY040-
DY015 /R1 /R2
Gas,
up to up to up to
Steam
DY300 DY200- DY200-
/R1 /R2
When the flow velocity is lower than minimum, both the analog
output and the pulse output is displayed as zero "0".
Gas, Steam
Liquid
General General
High
Type, Type,
Process
Cryogenic Cryogenic
Temperature
Type Type
Version
(unit: m/s) (unit: m/s)
(unit: m/s)
(Note) (Note)
250 /ρ –– 80/ρ or 3
122.5/ρ 490/ρ 45/ρ or 2
31.3/ρ or 2
90/ρ 302.5/ρ
90/ρ 160/ρ 31.3/ρ or 2
90/ρ 160/ρ 31.3/ρ or 2
90/ρ 160/ρ 31.3/ρ or 2
31.3/ρ or 3
90/ρ 160/ρ
122.5/ρ 202.5/ρ 45/ρ or 3
160/ρ –– 61.3/ρ or 3
61.3/ρ or 3
160/ρ ––
3
)
3
Maximum
flow
Minimum flow velocity
velocity
(Note)
"flow velocity obtained from
Table 9.5.1" or "flow velocity
at Reynolds number of
10 m/s
5000", whichever is greater.
For liquid Reynolds number
of 5000 : See P.9-16
"Calculation formula".
"flow velocity obtained from
Table 9.5.1" or "flow velocity
at Reynolds number of
5000", whichever is greater.
80 m/s
For Gas and steam
Reynolds number of 5000 :
See P.9-16 "Calculation
formula".
DYF Tab-11
Steam
High
Process
Temperature
version
(unit: m/s)
––
125/ρ or 2
90.3/ρ or 2
61.3/ρ or 2
61.3/ρ or 2
61.3/ρ or 2
61.3/ρ or 3
80/ρ or 3
––
––
DYF Tab-10
■ Range of fixed accuracy flow velocity
Table 9.5.3 Range of fixed accuracy flow velocity
Fluid Model Code
DY025-
DY015 /R1
up to up to
DY100 DY150-
/R1
Liquid
DY150
DY200-
up to
/R1
DY300
DY025-
DY015 /R1
up to up to
DY100 DY150-
/R1
Gas,
Steam
DY150
DY200-
up to
/R1
DY300
9-15
9. GENERAL DESCRIPTION
Minimum flow velocity
"flow velocity obtained from
Table 9.5.1" or
DY040-
"flow velocity at Reynolds
/R2
number of 20000", whichever
up to is greater.
For liquid Reynolds number
DY200-
of 20000 : The value is four
/R2
times velocity value in P.9-16
"Calculation formula".
"flow velocity obtained from
Table 9.5.1" or
"flow velocity at Reynolds
number of 40000", whichever
—
is greater.
For liquid Reynolds number
of 40000 : The value is eight
times velocity value in P.9-16
"Calculation formula".
"flow velocity obtained
fromTable 9.5.1" or
DY040-
"flow velocity at Reynolds
/R2
number of 20000",
up to whichever is greater.
For gas and steam
DY200-
Reynolds number of 20000 :
/R2
See P.9-16 "Calculation
formula".
"flow velocity obtained
fromTable 9.5.1" or
"flow velocity at Reynolds
number of 40000",
—
whichever is greater.
For gas and steam
Reynolds number of 40000 :
See P.9-16 "Calculation
formula".
IM 01F06A00-01E
Maximum
flow
velocity
(Note)
10 m/s
80 m/s
DYF Tab-12