YOKOGAWA DY080 User Manual

9-17
IM 01F06A00-01E
9. GENERAL DESCRIPTION
■ Calculation formula
■ How to calculate volume flow rate at operating
conditions.
υ  D
2
• Qf = 3600  υ  S or Qf =
354
■ How to calculate the velocity of a Reynolds number.
• υ = 5   / D (Reynolds number of 5000)
• υ = 20   / D (Reynolds number of 20000)
• υ = 40   / D (Reynolds number of 40000)
however
354 10
3
 Qf
• Re = ········· (1)
  D

•  =
 10
3
················· (2)
ρf
Qf : Volume flow rate at operating conditions (m
3
/h)
D: Inner diameter of YEWFLO (mm)
S: Sectional area of YEWFLO(m
2
)
υ : Flow velocity (m/s)
Re : Reynolds number (non unit)
ρf: Density at operating conditions (kg/m
3
)
 : Viscosity at operating conditions (mPa·s ( cP ) )
 : Kinematic viscosity at operating conditions (10
-6
m
2
/s ( cSt) )
■ Typical fluid example
Table 9.5.4 Range of Measurable Water Flow Rate
(At standard condition of 15°C, ρ = 1000 kg/m
3
)
DYF Tab-14-b
Model Code
Range of Fixed
Accuracy Flow
Rate in m
3
/h
Measurable Flow Rate
in m
3
/h
DY015
DY025
DY040
DY050
DY080
DY100
DY150
DY
200
DY
250
DY
300
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
—
—
—
—
0.30 up to 6
0.65 up to 18
1.3 up to 44
2.2 up to 73
4.3 up to 142
7.5 up to 248
17 up to 544
34
up
to 973
60
up
to 1506
86
up
to 2156
0.94 up to 6
1.7 up to 18
2.6 up to 44
3.3 up to 73
4.6 up to 142
7.5 up to 248
18 up to 544
34
up
to 973
60
up
to 1506
86
up
to 2156

YOKOGAWA DY080 Specifications

General

Brand	YOKOGAWA
Model	DY080
Category	Measuring Instruments
Language	English