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Air Duct Heel-Tapped Elbow, 90 Degree
According to 2001 ASHRAE Fundamentals Handbook C34, calculation of the pressure loss in the 90 ° heel shaped parting part at the elbow on the ventilation system.
Birim
SI
İngiliz/Amerikan
Flow rate-Main (Q
c
)
m³/h
lt/s
Branch Flow Rate (Q
b
)
Inlet Diameter (ØD
c
) (mm)
50
75
100
125
150
175
200
225
250
275
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1050
1100
1150
1200
1250
1300
1350
1400
1450
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
Outlet Diameter (ØD
b
) (mm)
25
50
75
100
125
150
175
200
225
250
275
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1050
1100
1150
1200
1250
1300
1350
1400
1450
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
Branch Diameter (ØD
s
) (mm)
50
75
100
125
150
175
200
225
250
275
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
1050
1100
1150
1200
1250
1300
1350
1400
1450
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
Fluid Temperature (°C)
Acoustic Insulation
No Insulation
6 mm
10 mm
20 mm
25 mm