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