Dwyer OP User Manual

Page 3

Inch d.p.

W/C

100
200

at 14.7 PSIA

(0 PSIG)

2.35

12.21
32.77

3.65

20.21
59.92

5.24
34.2

91.28

9.31

62.09

180

14.57
80.82

212.18

20.92

125.74
372.09

32.71

197.54
543.99

49.17
282.9
816.7

83.58

503.76

1,380.03

130.48
786.23

2,152.83

187.86

1,331.63
3,097.20

333.87

2,014.95
5,532.00

521.58

3,145.50
8,626.42

750.9
4,530

12,430.00

927.14

5,477.67

15,251.50

1,172.63
7,264.58

20,179.85

1,565.79
9,302.08

25,299.92

1,935.37

11,588.20
32,115.34

2,838.14

17,229.62
46,810.53

at 20 psig

3.63

19.58
56.15

5.66

32.44

102.91

8.11

54.92

156.51

14.41
99.75

309.97

22.55

129.68
363.93

32.38

202.03
639.87

50.64

317.58
936.56

76.13

454.77

1,404.95

129.44
810.06

2,373.02

202.11

1,264.42
3,701.57

291

1,820.05
5,325.20

517.25

3,241.45
9,525.43

808

5,060.38

14,846.80

1,163.44
7,288.16

21,397.00

1,436.59
8,812.87

28,262.66

1,817.05

11,688.26
34,749.32

2,426.34

14,966.93
43,535.32

2,999.11

18,645.74
55,303.34

4,398.25

27,726.33
80,610.19

at 100 psig

6.61

36.37

107.47

10.3

60.26
197.2

14.8

102.09

300

26.3

185.5
595.2

41.16
241.5

697.39

59.13
375.8

1,227.63

92.48

590.91

1,798.86

139.06
846.21

2,696.28

236.48

1,507.64
4,553.68

369.29

2,353.51
7,103.22

531.75

3,387.93

10,219.28

945.28

6,034.85

18,290.00

1,476.77
9,421.74

28,506.17

2,126.47

13,570.33
41,089.02

2,625.81

16,409.42
50,437.78

3,321.32

21,764.08
66,737.64

4,435.12

27,869.85
83,587.01

5,482.22

34,720.84

106,215.88

8,038.99

51,633.81

154,823.78

Series OP Orifice Plate Flow Meter

Model

Number

OP-A-1
OP-A-2
OP-A-3

OP-B-1
OP-B-2
OP-B-3

OP-C-1
OP-C-2
OP-C-3

OP-D-1
OP-D-2
OP-D-3

OP-E-1
OP-E-2
OP-E-3

OP-F-1
OP-F-2
OP-F-3

OP-G-1
OP-G-2
OP-G-3

OP-H-1
OP-H-2
OP-H-3

OP-J-1
OP-J-2
OP-J-3

OP-K-1
OP-K-2
OP-K-3

OP-L-1
OP-L-2
OP-L-3

OP-M-1
OP-M-2
OP-M-3

OP-N-1
OP-N-2
OP-N-3

OP-O-1
OP-O-2
OP-O-3

OP-P-1
OP-P-2
OP-P-3

OP-Q-1
OP-Q-2
OP-Q-3

OP-R-1
OP-R-2
OP-R-3

OP-S-1
OP-S-2
OP-S-3

OP-T-1
OP-T-2
OP-T-3

Line
Size

1/2"
1/2"
1/2"

3/4"
3/4"
3/4"

1"
1"
1"

1.25"
1.25"
1.25"

1.5"
1.5"
1.5"

2"
2"
2"

2.5"
2.5"
2.5"

3"
3"
3"

4"
4"
4"

5"
5"
5"

6"
6"
6"

8"
8"
8"

10"
10"
10"

12"
12"
12"

14"
14"
14"

16"
16"
16"

18"
18"
18"

20"
20"
20"

24"
24"
24"

Bore

0.200"
0.310"
0.430"

0.250"
0.400"
0.580"

0.300"
0.520"
0.720"

0.400"
0.700"

1.00"

0.500"
0.800"
1.100"

0.600"
1.000"
1.450"

0.750"
1.250"
1.750"

0.920"
1.500"
2.150"

1.200"
2.000"
2.800"

1.500"
2.500"
3.500"

1.800"
3.000"
4.200"

2.400"
4.000"
5.600"

3.000"
5.000"
7.000"

3.600"
6.000"
8.400"

4.000"
6.600"
9.300"

4.500"
7.600"

10.700"

5.200"
8.600"

12.000"

5.780"
9.600"

13.500"

7.000"

11.700"
16.300"

Beta

0.32
0.50
0.69

0.30
0.49
0.70

0.29
0.49
0.69

0.29
0.51
0.72

0.31
0.50
0.68

0.29
0.48
0.70

0.30
0.50
0.70

0.30
0.49
0.70

0.30
0.50
0.70

0.30
0.50
0.69

0.30
0.49
0.69

0.30
0.50
0.70

Inches d.p.

W/C

100
320

Flow in

GPM

0.62
3.44

13.00

0.97
5.69

23.82

1.38
9.63

36.15

2.46

17.48
71.77

3.85

22.73
83.95

5.52

35.34

147.74

8.63

55.54

216.30

12.97
79.94

324.16

22.03

141.51
547.11

34.39

220.80
853.09

49.46

317.74

1,226.98

87.95

565.77

2,195.86

137.35
883.04

3,421.26

197.73

1,271.62
4,930.86

244.14

1,537.49
6,052.57

308.76

2,038.95
8,007.74

412.26

2,610.71

10,027.37

509.55

3,252.22

12,742.82

747.18

4,835.93

18,572.50

Weight

(lbs)

1.00
1.00
1.00

2.00
2.00
2.00

3.00
3.00
3.00

4.00
4.00
4.00

5.00
5.00
5.00

7.00
7.00
7.00

8.00
8.00
8.00

10.00
10.00
10.00

14.00
14.00
14.00

20.00
20.00
20.00

30.00
30.00
30.00

40.00
40.00
40.00

48.00
48.00
48.00

56.00
56.00
56.00

64.00
64.00
64.00

78.00
78.00
78.00

• Material 304/304 L- dual certified- Gaskets Buna "N"
• Based on 70°F, 14.7 psia (Base Conditions)
• Beta Value Based on Std Sch pipe I.D.
• 1.25˝ overall thickness
• Orifice plate thickness is 0.125˝

WATER CAPACITY

AIR CAPACITY - Flow in SCFM

Note: Differential pressure values should be less than 50% of the inlet absolute pressure.

F-OP bulletin:F-OP bulletin 7/24/09 10:06 AM Page 3