Velocity to GPM Chart - ONICON

VELOCITY TO GPM CONVERSIONS

in standard wall pipes*

Flow Velocity (ft/sec) x Factor (1 ft/sec) = GPM

Typical HVAC Design Maximum Flow = 4 to 8 ft/sec

Nominal GPM @ GPM @ GPM @ GPM @ GPM @ GPM @

Pipe Size 1 ft/sec 2 ft/sec 4 ft/sec 8 ft/sec 10 ft/sec 12 ft/sec

0.50*

0.75*

1*

1.25*

1.5*

2*

2.5*

3*

4*

6*

8*

10*

12

14

16

18

20

24

30

36

42

0.9

1.7

2.7

4.7

6.4

11

15

23

40

90

156

246

353

430

569

728

907

1,323

2,094

3,042

4,165

1.9

3.3

6

9.3

13

21

30

46

79

180

312

492

706

860

1,138

1,456

1,814

2,646

4,188

6,084

8,330

3.8

6.6

12

19

25

42

60

92

159

360

624

984

1,412

1,720

2,276

2,912

3,628

5,292

8,378

12,168

16,660

7.6

13

24

37

51

84

119

184

318

720

1,248

1,968

2,824

3,440

4,552

5,824

7,256

10,584

16,755

24,336

33,320

9.5

17

30

47

64

105

149

230

397

900

1,560

2,460

3,530

4,300

5,690

7,280

9,070

13,230

20,940

30,420

41,650

11.4

20

36

56

76

126

179

279

476

1,080

1,872

2,952

4,236

5,160

6,828

8,736

10,884

15,876

25,133

36,504

49,980

48

5,465

10,930

21,861

43,722

54,650

65,583

* Standard Wall and Schedule 40 are the same up to 10¡±

0868-5

11451 Belcher Road South, Largo, FL 33773 ? USA ? Tel +1 (727) 447-6140 ? Fax +1 (727) 442-5699

? sales@

04-18

Turbine Flow Meter Site Selection

General Guidelines

? Acceptable to install in vertical pipe

? Position meter anywhere in the

upper 240? for horizontal pipe

BETTER

Evaluating Upstream Piping Conditions

CLEARANCE

REQUIRED FOR

INSTALLATION

WORSE

(23¡± to 26¡± depending on

pipe size)

FLOW

30%

Downstream

Straight Pipe

Single Bend

Pipe Reduction or Enlargement

Outflowing Tees

Multiple Bends in Same Plane

Multiple Bends Out of Plane

Inflowing Tees

Control Valve

70%

Upstream

Available Straight Run*

* Contact ONICON for model specific straight run requirements.

Helpful Formulae

Energy Calculations

BTU/Hr = 500* x Flow Rate (GPM) x Delta-T (?F)

1 Ton = 12,000 BTU/Hr

ONICON Specific Flow Calculations

Calculate Flow Rate from Frequency Output

GPM =

(Measured Frequency (Hz) x 60)

Meter Factor** (PPG)

Calculate Flow Rate from Current Output (4-20 mA)

GPM = (Measured Current (mA) -4) x

16 mA

Full Scale

Flow Rate**

Calculate Flow Rate from Voltage Output (0-10 VDC)

GPM = Measured Voltage (DC) x

10

Full Scale

Flow Rate**

* Approximation for water.

** Refer to calibration tag or certificate.

0868-5

11451 Belcher Road South, Largo, FL 33773 ? USA ? Tel +1 (727) 447-6140 ? Fax +1 (727) 442-5699

? sales@

04-18

 ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download