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Flow Rate and Pressure Drop Information

* Minimum Flow Rate Required For Actuation By H2O & GN²

I = Increasing Flow |  D = Decreasing Flow  | p = Pressure Drop In PSI
All Flow Switches Were Tested At 100 psi and 300 psi Standard Units With A 15A -125-250-480 VAC SPDT Micron-Switch. Lower actuation points can be reached using our special folding paddle.
See Liquid Flow Table
See Velocity Table
 
Flow Rate and Pressure Drop Information

PIPELINE SIZE

GPM H20

p

SCFM GN²

p

¼ "

I

1.174

4.72

6.62 1.54

D

1.155

4.39

4.20

.65

¼ " Low Flow

I

.148

4.59

Less than .05

.43

D

.13

4.58

.425

¼ " Low-Low Flow

I

Less than

6.39

 

.425

D

.005

8.84

 

.425

½ "

I

1.94

.64

8.9

.5

D

1.66

.60

8.0

.5

½ " Low Flow

1

.22

.7

Less than .04

.75

D

.20

.7

.735

½ " Low-Low Flow

I

Less than

1.15

 

.798

D

.01

1.13

 

.70

¾ "

I

3.14

.06

13.9

.07

D

2.42

.06

11.42

.07

¾ " Low Flow

I

.599

.8

5.37

.036

D

.513

.8

4.67

.036

¾ " Low-Low Flow

I

.01

1.22

Less than .05

.036

D

.01

1.22

.036

1"

I

3.2

.06

23.63

.07

D

2.5

.06

19.41

.07

1" Low Flow

I

.655

.785

9.129

.036

D

.64

.78

7.939

.036

1" Low-Low Flow

I

Less than

1.15

Less than .03

.03

D

.01

1.1

.03

1-½"

I

3.44

.72

26.0

.07

D

3.40

.72

23.8

.05

1-½" Low Flow

I

.756

1.2

Less than 1.0

.78

D

.755

1.2

.67

1-½" Low-Low Flow

I

.314

1.7

 

1.1

D

.313

1.7

 

.93

2" I 5.98 .7 35.4 .07
D 5.8 .68 32.8 .05
2" Low Flow I .76 1.2 Less than 1.0 .70
D .75 1.2 .61
2" Low-Low Flow I .32 1.9 Less than 1.0 .94
D .32 1.9 .86
 

3" Standard w/ 1-1/8" wide paddle

I

8.8

Less than .05

60.

Less than .05

D

8.2

57.3

3" Special w/ 1-7/8" wide paddle

I

7.2 *

20.0

D

6.5

16.8

4" Standard w/ 1-1/8"widepaddle

1

21.0

69.

D

19.5

58.8

4" Special w/ 1-7/8" wide paddle

1

11.8 *

20.1

D

10.5

14.5

6" Standard w/ 1-1/8"wide paddle

I

36.5

110.0

D

33.0

40.4

6" Special w/ 1-7/8" wide paddle

I

25.5 *

69.0

D

20.5

58.9

8" Standard w/ 1-1/8"wide paddle

I

45.0

140.0

D

37.5

80.2

8" Special w/ 1-7/8" wide paddle

I

35.7 *

95.0

D

27.4

81.4

10" Standard w/ 1-1/8" wide paddle

1

59.0

159.8

D

42.5

94.2

10" Special w/ 1-7/8" wide paddle

I

49.5 *

120.5

D

35.0

82.0

12" Standard w/ 1-1/8" wide paddle

I

79.9

170.5

D

58.0

98.9

12" Specialw/ 1-7/8" wide paddle

I

71.0 *

140.0

D
49.0 91.0
LIQUID FLOW VELOCITY
VELOCITY MODIFICATION REQUIRED
Under 7 FPS Use Standard Unit
7 - 10 FPS Paddle Shroud
Over 10 FPS High Flow Configuration
 
VELOCITY CHART
Specific Gravity Multiplication Factor Specific Gravity Multiplication Factor
.40 1.65 .95 1.03
.45 1.55 1.00 1.00
.50 1.46 1.05 .97
.55 1.39 1.10 .95
.60 1.33 1.15 .92
.65 1.27 1.20 .90
.70 1.22 1.25 .88
.75 1.17 1.30 .86
.80 1.13 1.35 .84
.85 1.10 1.40 .82
.90 1.06 1.45 .80
 
 
Northeast Controls Incorporated
Tel: 1-201-327-7660 | Fax: 1-201-327-3242 | email: sales@nciweb.com
123 Pleasant Avenue - Upper Saddle River - New Jersey 07458 USA
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