INSTALLATION
0.00% 0.50% 0.00% 0.50% 0.00% 0.50%
0.00% 0.50%
0.00% 0.50%
28D
14D
36D
18D
14D
7D
30D
15D
20D
10D
Additonal
Uncertainty
Length
Two or
more 90°
bends
Single
90°bend
Reduer
2D to D
over a length
of 1.5D to 3D
Expander
05D to D
over a length
of D to 2D
Full bore ball
or gate valve
fully open
Upstream
feature
Piping Considerations:
A certain length of straight upstream and downstream piping is necessary to optimize the accuracy of any diff erential pressure device.
Upstream:
The following tabulation provides the minimum straight upstream lengths (expressed as multiples of pipe ID) required for
0.0% and 0.5% additional potential aff ect in base fl ow accuracy.
Downstream:
For zero additional uncertainty due to downstream piping, ensure that there are no fi ttings for 7D downstream of the
Venturi or 3.5D for 0.50% additional uncertainty.
Bulletin 8632
page 6
Installation | 8632 Venturi
Designation
A
B
C
D
E
F
BC
H
J
K
L
M
Wt.
8632-6-S
13.333
4.190
5.634
3
7,500
0.750
6.000
45.000
4
2.148
0.940
6.080
33.481
8632-6-S316L
13.333 4.190 5.634 3 7,500 0.750 6.000 45.000 4 2.148 0.940 6.080 33.481
8632-7-S
15.596
4.440
6.287
4
9,000
0.750
7.500
22.500
8
2.818
0.940
6.580
50.444
8632-7-S316L
15.596 4.440 6.287 4 9,000 0.750 7.500 22.500 8 2.818 0.940 5.580 50.444
8632-8-S
20.347
4.940
7.645
6
11,000
0.880
9.500
22.500
8
4.246
1.000
7.580
93.352
8632-8-S316L
20.347 4.940 7.645 6 11,000 0.880 9.500 22.500 8 4.246 1.000 7.580 93.352
8632-9-S
24.873
5.440
8.951
8
13,500
0.880
11.750
22.500
8
5.587
1.130
8.580
166.745
8632-9-S316L
24.873 5.440 8.951 8 13.500 0.880 11,750 22.500 8 5.587 1.130 8.580 166.745
Venturi
A
C
B
M
L
¼
" NPT
high pressure tap
¼
" NPT
low pressure tap
D
Pipe Size
BC
E
H°
ØF # holes - J
K bore ID
D
IMENSIONS SHOWN ARE SUBJECT TO CHANGE. PLEASE OBTAIN CERTIFIED PRINTS FROM FIVES NORTH AMERICAN COMBUSTION, INC.
IF SPACE LIMITATIONS OR OTHER CONSIDERATIONS MAKE EXACT DIMENSION(S) CRITICAL
.
DIMENSIONS
