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FGR Intake Applications

 
 

FGR Series

INTAKE SILENCER

 

 

FGR Intake silencers are used on stack top intakes, blower inlets, Vertical TEFC Motor inlets, fan intakes and rotary positive displacement blower intakes. Please refer to the chart below for sizing options.

 

 

Notes:

 

1. User to provide dimensions D

    and E. Mounting flange furnished

    undrilled unless user provides

    hole sizes and location or number

    of holes on bolt circle.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

    Oxeld FGR series silencers are

    Also available in larger sizes…

    Up to 54” inside diameter,

    Handling up to 60,000 CFM.

  

 

 SIZE AND MODEL NUMBER

 

Dim

1012 FGR

1212 FGR

1414 FGR

1616 FGR

1818 FGR

2020 FGR

2426 FGR

3030 FGR

3636 FGR

REF

A

14”

16”

18”

20”

22”

24”

28”

36”

42”

 

B

10”

12”

14”

16”

18”

20”

24”

30”

36”

 

C

4”

4”

4”

4”

4”

4”

4”

6”

6”

 

D

 

 

 

 

 

 

 

 

 

NOTE 1

E

 

 

 

 

 

 

 

 

 

NOTE 1

F

4”

4”

5”

5”

6”

6”

6”

6”

6”

 

G

3”

3”

3 Ύ”

3 Ύ”

3 Ύ”

3 Ύ”

3 Ύ”

4 Ύ”

4 Ύ”

 

H

13”

13”

15”

17”

19”

21”

26”

30”

36”

 

I

24”

24”

27 Ύ”

29 Ύ”

32 Ύ”

34 Ύ”

39 Ύ”

46 Ύ”

52 Ύ”

 

 

   

 

 
     

 ATTENUATION AND AIR FLOW

Model number

INSERTION LOSS AT 3FT.

AIR FLOW CFM

APPROX. WT. IN LBS.

B.B.

dBA

125

dB

250

dB

500

dB

1000

dB

2000

dB

4000

dB

@

0.50”

@

0.75”

SILENCER
ADAPTER

1012 FGR

32

24

22

33

38

38

40

750

1130

27

10

1212 FGR

34

25

24

36

36

37

39

1420

1620

30

12

1414 FGR

33

24

23

34

37

36

31

2550

2870

43

14

1616 FGR

33

16

20

25

34

54

55

4500

5200

53

16

1818 FGR

33

18

20

28

42

40

57

5200

6000

63

19

2020 FGR

36

18

23

34

34

43

55

5900

6800

72

25

2426 FGR

(2426-135 FGR)

36

(39)

17

(26)

21

(23)

39

(32)

30

(42)

46

(56)

55

(60)

9200

(11000)

10300

(12100)

110

(120)

50

(50)

3030 FGR

40

28

28

33

40

55

59

14500

17000

180

60

3636 FGR

39

27

22

32

41

53

58

20000

23000

240

70

 

Above reading were taken during in-plant tests of Silencers. Air flow and pressure drop tests follow the joint

Standard ASHRAE 51-75 and AMCA 210-74. Attenuation tests made in large reverberant room, reading high level noise at selected frequencies, “open speaker”, and “attenuator in place”, using GENRAD 1565-A

And 1933 meters, calibrated with 1562-A calibrator before test. Broad band noise generated by GENRAD type 1390-A noise source.

 

 

       TYPE 1 ADAPTER                           TYPE 2 ADAPTER                          TYPE 3 ADAPTER

 

TAPER CONNECTS SILENCER TO

LARGER SIZE INLET ON MOTOR

ADAPTER IS STRAIGHT – NO TAPER

ADAPS LAGER SIZE SILENCER

TO SMALLER AIR INLET ON MOTOR

 

NOTE: Special adapters can be furnished for your requirements if you will supply a sketch. Adapters have internal acoustical treatment. Adapter types 1,2, and 3 will be punched to match the mounting flange of your equipment if you specify numbers and size of bolt holes and diameter of bolt circle.

 

  
     

 

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Last modified: 09/08/10