Dwyer ULL - Manual (Page 14)

Neyrpic Venturi Flume/Long-Base Weir (Type 9)
Flumes/Weirs - American Standard
Rectagular Suppressed Sharp-Crested Weir (Type 1)
Rectangular Contracted Sharp-Crested Weir (Type 2)
Trapezoidal (Cipolletti) Sharp-Crested Weir (Type 3)
V-Notch (Triangular) Sharp-Crested Weir (Type 4)
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Code (YY)
01
02
03
04
05
06
07
08
09
Venturi Flume Type
1253AX
1253AY
1253AZ
1253A
1253B
1253C
1253D
1253E
1253F
Figure 19: Neyrpic Venturi Flume
Code (YY)
10
11
12
13
Long Base Weir Type
1245A
1245B
1245C
1245D
Figure 20: Long-Base Weir
Figure 21: Rectangular Suppressed Sharp-Crested Weir
Code (YY)
01
02
03
04
05
06
07
08
09
Crest Length (in)
12.00
18.00
24.00
30.00
36.00
48.00
60.00
72.00
96.00
Figure 22: Rectangular Contracted Sharp-Crested Weir
Code (YY)
01
02
03
04
05
06
07
08
09
Crest Length (in)
12.00
18.00
24.00
30.00
36.00
48.00
60.00
72.00
96.00
Figure 23: Trapezoidal (Cipolletti) Sharp-Crested Weir
Code (YY)
01
02
03
04
05
06
07
08
09
Crest Length (in)
12.00
18.00
24.00
30.00
36.00
48.00
60.00
72.00
96.00
Code (YY)
01
02
03
04
05
V-Notch Angle (°)
90
60
45
30
22.5
Figure 24: V-Notch (Triangular) Sharp-Crested Weir