BS&B Safety Systems
KR (Left of Slash)/Minimum Net Flow Area (Right of Slash)
Minimum Net Flow Area (MNFA) in Square Inches

08 March 2024

Size

Style

Media

0.5"

B, BR, BRR

LiquidB, BR, BRR

Gas

B-,BR-, BRR-LTF(Note 5)

1.0"

1.5"

2.0"

3.0"

4.0"

6.0"

8.0"

10.0"

12.0"

14.0"

16.0"

18.0"

20.0"

24.0"

30.0"

36.0"

1.47/0.18

1.47/0.80

1.47/1.76

1.47/3.33

1.47/6.51

1.47/11.8

1.47/28.8

1.47/49.8

1.47/78.8

1.47/112.0

1.47/137.0

1.47/182.0

1.47/233.0

1.47/291.0

1.47/424.0

1.47/671.0

1.47/975.0

0.71/0.18

0.71/0.80

0.71/1.76

0.23/3.33

0.71/6.51

0.71/11.8

0.71/28.8

0.71/49.8

0.71/78.8

0.71/112.0

0.71/137.0

0.71/182.0

0.71/233.0

0.71/291.0

0.71/424.0

0.71/671.0

0.71/975.0

Liquid

8.0/0.18

8.0/0.80

8.0/1.76

8.0/3.33

8.0/6.51

8.0/11.8

8.0/28.8

8.0/49.8

8.0/78.8

8.0/112.0

8.0/137.0

8.0/182.0

8.0/233.0

8.0/291.0

8.0/424.0

8.0/671.0

8.0/975.0

B-,BR-, BRR-LTF(Note 5)Gas

8.0/0.18

8.0/0.80

8.0/1.76

8.0/3.33

8.0/6.51

8.0/11.8

8.0/28.8

8.0/49.8

8.0/78.8

8.0/112.0

8.0/137.0

8.0/182.0

8.0/233.0

8.0/291.0

8.0/424.0

8.0/671.0

8.0/975.0

BV-,BRV-,BSV-,BRSV-LTF(Note 5)

Liquid

2.47/0.57

2.47/1.44

2.47/2.24

2.47/5.41

2.47/9.62

2.47/23.7

2.47/44.1

2.47/70.8

2.47/101.0

2.47/130.0

2.47/176.0

2.47/202.0

2.47/279.0

2.47/380.0

2.47/615.0

2.47/927.0

Gas

2.47/0.57

2.47/1.44

2.47/2.24

2.47/5.41

2.47/9.62

2.47/23.7

2.47/44.1

2.47/70.8

2.47/101.0

2.47/130.0

2.47/176.0

2.47/202.0

2.47/279.0

2.47/380.0

2.47/615.0

2.47/927.0

Liquid

2.47/0.57

2.47/1.44

2.47/2.24

2.47/5.41

2.47/9.62

2.47/23.7

2.47/44.1

2.47/70.8

2.47/101.0
2.47/101.0

BV-,BRV-,BSV-,BRSV-LTF(Note 5)

BV-,BRV-,BSV-,BRSV-LTF (w/liners)(Note 5)

BV-,BRV-,BSV-,BRSV-LTF (w/liners)(Note 5)Gas

0.6875"0.75"

2.47/0.57

2.47/1.44

2.47/2.24

2.47/5.41

2.47/9.62

2.47/23.7

2.47/44.1

2.47/70.8

B-Series w/liner(Note 3)Liquid

1.47/0.18

1.47/0.80

1.47/1.76

1.47/3.33

1.47/6.51

1.47/11.8

1.47/28.8

1.47/49.8

1.47/78.8

1.47/112.0

B-Series w/liner(Note 3)Gas

0.71/0.18

0.71/0.80

0.71/1.76

0.71/3.33

0.71/6.51

0.71/11.8

0.71/28.8

0.71/49.8

0.71/78.8

0.71/112.0

BV-Series(Note 3)

Liquid

2.45/0.57

2.45/1.44

2.45/2.24

2.45/5.41

2.45/9.62

2.45/23.7

2.45/44.1

2.45/70.8

2.45/101.0

2.45/130.0

2.45/176.0

2.45/202.0

2.45/279.0

2.45/380.0

2.45/615.0

2.45/927.0

BV-Series(Note 3)

Gas

0.80/0.57

0.80/1.44

0.55/2.24

0.80/5.41

0.80/9.62

0.80/23.7

0.80/44.1

0.80/70.8

0.80/101.0

0.80/130.0

0.80/176.0

0.80/202.0

0.80/279.0

0.80/380.0

0.80/615.0

0.80/927.0

BV-Series w/liner(Note 3)

Liquid

2.45/0.57

2.45/1.44

2.45/2.24

2.45/5.41

2.45/9.62

2.45/23.7

2.45/44.1

2.45/70.8

2.45/101.0

BV-Series w/liner(Note 3)

Gas

0.80/0.57

0.80/1.44

0.55/2.24

0.80/5.41

0.80/9.62

0.80/23.7

0.80/44.1

0.80/70.8

0.80/101.0

Scored B, XB, & "SCD B"

Liquid

0.40/0.86

0.40/2.03

0.40/3.35

0.40/7.39

0.40/12.7

0.40/28.8

0.40/50.0

0.40/78.8

0.40/111.0

0.40/137.0

0.40/176.0

0.40/223.0

0.40/277.0

0.40/402.2

Scored B, XB, & "SCD B"

Gas

0.40/0.86

0.40/2.03

0.40/3.35

0.40/7.39

0.40/12.7

0.40/28.8

0.40/50.0

0.40/78.8

0.40/111.0

0.40/137.0

0.40/176.0

0.40/223.0

0.40/277.0

0.40/402.2

Scored B, XB, & "SCD B"-LTF(Note 5)

Liquid

4.77/0.80

4.77/1.76

4.77/3.33

4.77/6.51

4.77/11.82

4.77/28.8

4.77/49.9

4.77/78.9

4.77/112.5

4.77/137.9

4.77/182.7

4.77/233.7

4.77/291.0

4.77/424.6

Scored B, XB, & "SCD B"-LTF(Note 5)Gas

4.77/0.80

4.77/1.76

4.77/3.33

4.77/6.51

4.77/11.82

4.77/28.8

4.77/49.9

4.77/78.9

4.77/112.5

4.77/137.9

4.77/182.7

4.77/233.7

4.77/291.0

4.77/424.6

D, DR, DRR

Liquid

1.3/0.80

1.3/1.76

1.3/3.33

1.3/6.51

1.3/11.8

1.3/28.8

1.3/49.8

1.3/78.8

1.3/112.0

1.3/137.0

1.3/182.0

1.3/233.0

1.3/291.0

1.3/424.0

1.3/671.0

1.3/975.0

D, DR, DRR

Gas

1.19/0.69

1.19/1.62

1.19/2.95

1.19/6.49

1.19/11.0

1.19/25.9

1.19/47.1

1.19/74.6

1.19/106.0

1.19/135.0

1.19/176.0

1.19/223.0

1.19/277.0

1.19/397.0

1.19/661.0

1.19/907.0

D-,DR-, DRR-LTF(Note 5)

Liquid

2.3/0.80

2.3/1.76

2.3/3.33

2.3/6.51

2.3/11.8

2.3/28.8

2.3/49.8

2.3/78.8

2.3/112.0

2.3/137.0

2.3/182.0

2.3/223.0

2.3/291.0

2.3/424.0

2.3/671.0

2.3/975.0

D-,DR-, DRR-LTF(Note 5)Gas

2.3/0.80

2.3/1.76

2.3/3.33

2.3/6.51

2.3/11.8

2.3/28.8

2.3/49.8

2.3/78.8

2.3/112.0

2.3/137.0

2.3/182.0

2.3/223.0

2.3/291.0

2.3/424.0

2.3/671.0

2.3/975.0

DV, DRV, DSV, DRSV

Liquid

2.60/0.57

2.60/1.44

2.60/2.24

2.60/5.41

2.60/9.62

2.60/23.7

2.60/44.1

2.60/70.8

2.60/101.0

2.60/130.0

2.60/176.0

2.60/202.0

2.60/280.0

2.60/380.0

2.60/615.0

2.60/927.0

DV, DRV, DSV, DRSV

Gas

1.19/0.69

1.19/1.62

1.19/2.94

1.19/6.49

1.19/11.0

1.19/25.9

1.19/47.1

1.19/74.6

1.19/106.0

1.19/135.0

1.19/176.0

1.19/223.0

1.19/277.0

1.19/397.0

1.19/660.0

1.19/907.0

PLD

Liquid

4.2/0.69

4.2/1/62

4.2/2.95

4.2/6.49

4.2/11/0

4.2/25.9

4.2/47.1

4.2/74.6

4.2/106.0

4.2/135.0

4.2/176.0

4.2/223.0

4.2/277.0

4.2/397.0

4.2/661.0

4.2/907.0

PLD

Gas

4.2/0.69

4.2/1/62

4.2/2.95

4.2/6.49

4.2/11/0

4.2/25.9

4.2/47.1

4.2/74.6

4.2/106.0

4.2/135.0

4.2/176.0

4.2/223.0

4.2/277.0

4.2/397.0

4.2/661.0

4.2/907.0

PLDV

Liquid

6.0/0.57

6.0/1.44

6.0/2.24

6.0/5.41

6.0/9.62

6.0/23.7

6.0/44.1

6.0/70.8

6.0/101.0

6.0/130.0

6.0/176.0

6.0/202.0

6.0/270.0

6.0/375.0

6.0/650.0

6.0/900.0

PLDV

Gas

6.0/0.57

6.0/1.44

6.0/2.24

6.0/5.41

6.0/9.62

6.0/23.7

6.0/44.1

6.0/70.8

6.0/101.0

6.0/130.0

6.0/176.0

6.0/202.0

6.0/270.0

6.0/375.0

6.0/650.0

6.0/900.0

AVV

Liquid

10.5/0.40

10.5/0.95

10.5/1.60

10.5/4.0

10.5/8.0

10.5/16.5

10.5/35.75

10.5/45.5

10.5/62.75

10.5/74.5

10.5/111.0

10.5/158.0

10.5/195.0

10.5/280.0

10.5/425.0

10.5/630.0

AVV

Gas

10.5/0.40

10.5/0.95

10.5/1.60

10.5/4.0

10.5/8.0

10.5/16.5

10.5/35.75

10.5/45.5

10.5/62.75

10.5/74.5

10.5/111.0

10.5/158.0

10.5/195.0

10.5/280.0

10.5/425.0

10.5/630.0

BS&B Safety Systems
KR (Left of Slash)/Minimum Net Flow Area (Right of Slash)
Minimum Net Flow Area (MNFA) in Square Inches

08 March 2024

Size

Style

Media

AV-E & AV-EL
AV-E & AV-EL
CSR (w/ or w/o Liners)

0.5"

0.6875"

0.75"

1.0"

1.5"

2.0"

3.0"

4.0"

6.0"

8.0"

10.0"

12.0"

14.0"

16.0"

18.0"

20.0"

24.0"

30.0"

36.0"

Liquid

1.2/0.864

1.2/2.036

1.2/3.356

1.2/7.392

1.2/12.73

1.2/28.89

1.2/50.02

1.2/78.85

1.2/113.1

1.2/137.9

1.2/182.7

1.2/233.7

1.2/291.0

1.2/424.6

1.2/672.0

1.2/975.9

Gas

1.2/0.864

1.2/2.036

1.2/3.356

1.2/7.392

1.2/12.73

1.2/28.89

1.2/50.02

1.2/78.85

1.2/113.1

1.2/137.9

1.2/182.7

1.2/233.7

1.2/291.0

1.2/424.6

1.2/672.0

1.2/975.9

Liquid

3.19/0.86

3.19/2.03

3.19/3.35

3.19/7.39

3.19/12.7

3.19/28.8

3.19/50.0

CSR (w/ or w/o Liners)

Gas

1.0/0.86

1.0/2.03

1.0/3.35

1.0/7.39

1.0/12.7

1.0/28.8

1.0/50.0

CSI (w/ or w/o Liners)

Liquid

3.09/0.86

3.09/1.89

3.09/3.35

3.09/7.29

3.09/11.2

3.09/22.6

3.09/42.7

3.09/66.3

CSI (w/ or w/o Liners)

Gas

0.62/0.86

0.62/1.89

0.62/3.35

0.62/7.29

0.62/11.2

0.62/22.6

0.62/42.7

0.62/66.3

Sigma (Series)

Liquid

1.25/0.86

1.25/1.93

1.25/3.36

1.25/7.39

1.25/12.7

1.25/28.8

1.25/50.0

Sigma (Series)

Gas

0.38/0.86

0.38/1.93

0.38/3.36

0.38/7.39

0.38/12.7

0.38/28.8

0.38/50.0

UBR

Liquid

1.25/0.86

1.25/1.93

1.25/3.36

1.25/7.39

1.25/12.7

1.25/28.8

1.25/50.0

UBR

Gas

0.38/0.86

0.38/1.93

0.38/3.36

0.38/7.39

0.38/12.7

0.38/28.8

0.38/50.0

LPS & LPS Welded Assembly

Liquid

0.86/0.86

0.86/1.93

0.86/3.36

0.86/7.39

0.86/12.7

0.86/28.8

0.86/50.0

0.86/78.8

0.86/111.8

LPS & LPS Welded AssemblyGas

0.79/0.86

0.79/1.93

0.79/3.36

0.79/7.39

0.79/12.7

0.79/28.8

0.79/50.0

0.79/78.8

0.79/111.8

LPS-U

LIquid

1.22/0.304

0.93/0.533

1.7/0.608

1.06/0.304

0.89/0.533

1.7/0.608
1.13/50.0

1.13/78.8

1.13/111.0

1.13/135.0

1.13/176.0

1.13/223.0

1.13/277.0

1.13/402.0

1.13/672.0

LPS-U

Gas

S-90 (w/ or w/o Liners & S-90 Welded Assys).

Gas

1.13/0.86

1.13/2.03

1.13/3.36

1.13/7.39

1.13/12.7

1.13/28.8

LSR & LSR Welded Assembly

Liquid

0.59/0.86

0.59/2.03

0.59/3.36

0.59/7.39

0.59/12.74

0.59/28.89

LSR & LSR Welded AssemblyGas

0.59/0.86

0.59/2.03

0.59/3.36

0.59/7.39

0.59/12.74

0.59/28.89

S-90 (Note 1)

Gas

0.23/0.86

0.23/2.03

0.23/3.36

0.23/7.39

0.23/12.7

0.23/28.8

0.23/50.0

0.23/78.8

0.23/111.0

0.23/135.0

0.23/176.0

0.23/223.0

0.23/277.0

0.23/402.0

0.23/672.0

S-90 Double Disk AssemblyGas

1.13/0.86

1.13/2.03

1.13/3.35

1.13/7.39

1.13/12.7

1.13/28.8

1.13/50.0

1.13/78.8

1.13/111.0

1.13/135.0

1.13/176.0

1.13/223.0

1.13/277.0

1.13/402.0

1.13/672.0

SVI

Gas

11.35/1.37 11.35/2.26

11.35/5.11

11.35/8.66

11.35/20.9

11.35/37.0

11.35/61.0

0.31/357.0

0.31/592.0

MVB

Gas

SRC(Note 3)

Gas

JRS

Gas

RLS (w/ or w/o Liners & Welded Assy)

LiquidRLS (w/ or w/o Liners & Welded Assy)Gas

RLS Double Disk Assembly

LiquidRLS Double Disk Assembly
SKR & SKR Welded Assy.

Gas
LiquidSKR & SKR Welded Assy.
SKR-U

0.23/7.39
1.1/3.35

1.1/7.39

1.1/12.7

1.1/28.8

1.1/50.0

0.31/0.86

0.31/1.89

0.31/3.35

0.31/6.53

0.31/11.86

0.31/25.08

0.31/42.07

0.31/68.65

0.31/102.28 0.31/121.86 0.31/156.0

0.31/198.0

0.31/246.0

5.83/0.50

5.83/0.84

5.83/1.77

5.83/3.23

5.83/6.44

5.83/11.5

5.83/26.4

5.83/47.0

5.83/73.9

5.83/99.0

5.83/219.0

5.83/270.0

1.14/0.50

1.14/0.84

1.14/1.77

1.14/3.23

1.14/6.44

1.14/11.5

1.14/26.4

1.14/47.0

1.14/73.9

5.83/0.84

5.83/1.77

5.83/3.23

5.83/6.44

5.83/11.5

5.83/26.4

5.83/47.0

5.83/73.9

1.90/0.59

1.9/0.84
1.90/0.86

1.9/1.77
1.90/2.04

1.9/3.23
1.90/3.36

1.9/6.44
1.90/7.39

1.9/11.5
1.90/12.74

1.9/26.4
1.90/28.89

1.9/47.0
1.90/50.0

1.9/73.9
1.90/78.86

1.9/99.0
1.90/111.87

Gas

0.37/0.59

0.37/0.86

0.37/2.04

0.37/3.36

0.37/7.39

0.37/12.74

0.37/28.89

0.37/50.0

0.37/78.86

0.37/111.87

Liquid

1.10/0.53

2.20/0.61

5.83/131.0

5.83/172.0

1.14/99.0

1.14/131.0

1.14/172.0

1.14/219.0

1.14/270.0

5.83/99.0

5.83/131.0

5.83/172.0

5.83/219.0

5.83/270.0

1.9/131.0

1.9/172.0

1.9/219.0

1.9/270.0

0.31/868.0

BS&B Safety Systems
KR (Left of Slash)/Minimum Net Flow Area (Right of Slash)
Minimum Net Flow Area (MNFA) in Square Inches

08 March 2024

Size

Style

Media

0.5"

SKR-U

Gas

0.85/0.30

0.6875"

0.75"

1.0"

0.73/0.53

1.25/0.61

1.5"

2.0"

3.0"

4.0"

6.0"

8.0"

10.0"

12.0"

SKr Double Disk Assembly

Liquid

1.6/0.59

1.6/0.86

1.6/2.04

1.6/3.36

1.6/7.39

1.6/12.74

1.6/28.89

1.6/50.0

1.6/78.86

1.6/111.87

SKR Double Disk AssemblyGas

0.63/0.59

0.63/0.86

0.63/2.04

0.63/3.36

0.63/7.39

0.63/12.74

0.63/28.89

0.63/50.0

0.63/78.86

0.63/111.87

SKI & SKI-TN

Liquid

1.03/0.86

1.03/1.93

1.03/3.36

1.03/7.39

1.03/12.74

1.03/28.89

1.03/50.0

SKI & SKI-TN

Gas

0.47/0.86

0.47/1.93

0.47/3.36

0.47/7.39

0.47/12.74

0.47/28.89

0.47/50.0

SSR

Liquid

0.52/0.86

0.52/1.93

0.52/3.36

0.52/7.39

0.52/12.74

0.52/28.89

0.52/50.0

0.52/78.8

SSR

Gas

0.52/0.86

0.52/1.93

0.52/3.36

0.52/7.39

0.52/12.74

0.52/28.89

0.52/50.0

0.52/78.8

SRD

Liquid

4.0/0.84

4.0/1.77

4.0/3.23

4.0/6.44

4.0/11.54

4.0/26.44

4.0/47.07

SRD

Gas

0.59/0.84

0.59/1.77

0.59/3.23

0.59/6.44

0.59/11.54

0.59/26.44

0.59/47.07

SRD-L

Gas

3.4/0.84

3.4/1.77

3.4/3.23

3.4/6.44

3.4/11.54

3.4/26.44

3.4/47.07

SRD-L

Liquid

4.5/0.84

4.5/1.77

4.5/3.23

4.5/6.44

4.5/11/54

4.5/26.44

4.5/47.07

CCS

Liquid

4.0/0.84

4.0/1.77

4.0/3.23

4.0/6.44

4.0/11.54

4.0/26.44

4.0/47.07

CCS

Gas

0.59/0.84

0.59/1.77

0.59/3.23

0.59/6.44

0.59/11.54

0.59/26.44

0.59/47.07

CCS-L

Gas

3.4/0.84

3.4/1.77

3.4/3.23

3.4/6.44

3.4/11.54

3.4/26.44

3.4/47.07

CCS-L

Liquid

4.5/0.84

4.5/1.77

4.5/3.23

4.5/6.44

4.5/11/54

4.5/26.44

4.5/47.07

FRS

Gas

0.80/0.86

0.80/1.93

0.80/3.35

0.80/0.86

0.80/1.93

0.80/3.35

14.0"

16.0"

18.0"

20.0"

24.0"

0.58/348.0

FRS w/liner (Note 3)

Gas

ECR

LiquidECR

Gas

0.58/0.86

0.58/2.03

0.58/3.35

0.58/7.30

0.58/12.1

0.58/25.4

0.58/43.6

0.58/66.3

0.58/94.7

0.58/118.0

0.58/154.0

0.58/195.0

0.58/241.0

ECV

Gas

4.2/0.735

4.2/1.24

4.2/2.21

4.2/4.76

4.2/7.9

4.2/18.1

4.2/31.4

4.2/48.8

4.2/69.4

4.2/88.0

4.2/115.0

4.2/146.0

4.2/180.0

4.2/261.0

RB-90

Gas

3.47/0.83

3.47/1.80

3.47/3.15

3.47/6.84

3.47/11.84

3.47/25.44

3.47/47.6

3.47/67.6

3.47/101.8

3.47/121.6

3.47/162.7

3.47/209.9

3.47/262.9

3.47/386.8

MRB

Gas

5.3/0.55

5.3/1.24

5.3/2.20

5.3/4.50

5.3/8.80

5.3/19.8

5.3/35.2

5.3/55.0
0.55/137.9

0.55/176.7

0.55/223.3

0.55/277.9

0.55/402.0

30.0"

36.0"

3.47/617.6

3.47/872.8

1.77/592

1.77/868(Not Tested)

5.3/0.14

5.3/0.31

GFN (w/ or w/o Liners)

Gas

0.55/0.864

0.55/2.03

0.55/3.36

0.55/7.39

0.55/12.7

0.55/28.9

0.55/50.0

0.55/78.8

0.55/111.9

XT(Note 3)

Liquid

0.5/0.86

0.5/2.03

0.5/3.36

0.5/7.39

0.5/12.7

0.5/28.8

0.5/50.0

0.5/78.8

0.5/111.0

XT(Note 3)Gas

0.5/0.86

0.5/2.03

0.5/3.36

0.5/7.39

0.5/12.7

0.5/28.8

0.5/50.0

RCS, VSP-SH

Gas

MB, AMB(Note 4)

Liquid

0.19/0.86

0.19/2.03

0.19/3.35

0.19/7.39

0.19/12.7

0.19/28.8

0.5/78.8

0.5/111.0

1.77/68.65

1.77/102.28 1.77/121.86

1.77/156

1.77/198

1.77/246

1.77/357

0.19/50.0

0.19/78.8

0.19/113.0

0.19/137.0

0.19/182.0

0.19/233.0

0.19/291.0

0.19/424.0

MB, AMB(Note 4)Gas

0.19/0.86

0.19/2.03

0.19/3.35

0.19/7.39

0.19/12.7

0.19/28.8

0.19/50.0

0.19/78.8

0.19/113.0

0.19/137.0

0.19/182.0

0.19/233.0

0.19/291.0

0.19/424.0

MBV, AMBV (bar spt)(Note 4)

Liquid

1.9/0.63

1.9/1.66

1.9/2.69

1.9/5.92

1.9/10.4

1.9/23.1

1.9/40.9

1.9/63.7

1.9/91.5

1.9/110.0

1.9/146.0

1.9/186.0

1.9/232.0

1.9/339.0

MBV, AMBV (bar spt)(Note 4)

Gas

1.9/0.63

1.9/1.66

1.9/2.69

1.9/5.92

1.9/10.4

1.9/23.1

1.9/40.9

1.9/63.7

1.9/91.5

1.9/110.0

1.9/146.0

1.9/186.0

1.9/232.0

1.9/339.0

BS&B Safety Systems
KR (Left of Slash)/Minimum Net Flow Area (Right of Slash)
Minimum Net Flow Area (MNFA) in Square Inches

08 March 2024

Size

Style

Media
(Note 4)0.5"

0.6875"

0.75"

1.0"

1.5"

2.0"

3.0"

4.0"

6.0"

8.0"

10.0"

12.0"

14.0"

16.0"

18.0"

20.0"

24.0"
5.40/226.0

MBV, AMBV (dial spt)

Liquid

5.40/0.298

5.40/1.02

5.40/1.74

5.40/4.20

5.40/7.60

5.40/15.8

5.40/25.8

5.40/41.0

5.40/59.1

5.40/88.3

5.40/95.7

5.40/124.0

5.40/153.0

MBV, AMBV (dial spt)(Note 4)Gas

5.40/0.298

5.40/1.02

5.40/1.74

5.40/4.20

5.40/7.60

5.40/15.8

5.40/25.8

5.40/41.0

5.40/59.1

5.40/88.3

5.40/95.7

5.40/124.0

5.40/153.0

5.40/226.0

IMB, AIMB, FSM, AFSM(Note 4)

Liquid

0.31/0.86

0.31/2.03

0.31/3.35

0.31/7.39

0.31/12.7

0.31/28.8

0.31/50.0

0.31/78.8

0.31/113.0

0.31/137.0

0.31/182.0

0.31/233.0

0.31/291.0

0.31/424.0

IMB, AIMB, FSM, AFSM(Note 4)Gas

0.31/0.86

0.31/2.03

0.31/3.35

0.31/7.39

0.31/12.7

0.31/28.8

0.31/50.0

0.31/78.8

0.31/113.0

0.31/137.0

0.31/182.0

0.31/233.0

0.31/291.0

0.31/424.0

IMBL, AIMBL(Note 4)

Liquid

0.31/0.86

0.31/2.03

0.31/3.35

0.31/7.39

0.31/12.7

0.31/28.8

0.31/50.0

0.31/78.8

0.31/113.0

0.31/137.0

0.31/182.0

0.31/233.0

0.31/291.0

0.31/424.0(Note 4)

IMBL, AIMBL

Gas

0.31/0.86

0.31/2.03

0.31/3.35

0.31/7.39

0.31/12.7

0.31/28.8

0.31/50.0

0.31/78.8

0.31/113.0

0.31/137.0

0.31/182.0

0.31/233.0

0.31/291.0

0.31/424.0

RE, REA(Note 4)

Liquid

0.15/0.86

0.15/2.03

0.15/3.35

0.15/7.39

0.15/12.7

0.15/28.8

0.15/50.0

0.15/78.8

0.15/113.0

0.15/137.0

0.15/182.0

0.15/233.0

0.15/291.0

0.15/424.0

RE, REA(Note 4)Gas

0.15/0.86

0.15/2.03

0.15/3.35

0.15/7.39

0.15/12.7

0.15/28.8

0.15/50.0

0.15/78.8

0.15/113.0

0.15/137.0

0.15/182.0

0.15/233.0

0.15/291.0

0.15/424.0

REV, REVA(Note 4)

Liquid

3.15/0.69

3.15/1.76

3.15/3.09

3.15/6.29

3.15/10.2

3.15/20.9

3.15/37.1

3.15/56.5

3.15/77.5

3.15/99.1

3.15/125.0

3.15/158.0

3.15/190.0

3.15/269.0

REV, REVA(Note 4)Gas

3.15/0.69

3.15/1.76

3.15/3.09

3.15/6.29

3.15/10.2

3.15/20.9

3.15/37.1

3.15/56.5

3.15/77.5

3.15/99.1

3.15/125.0

3.15/158.0

3.15/190.0

3.15/269.0

REL, RELA(Note 4)

Liquid

0.16/0.86

0.16/2.03

0.16/3.35

0.16/7.39

0.16/12.7

0.16/28.8

0.16/50.0

0.16/78.8

0.16/113.0

0.16/137.0

0.16/182.0

0.16/233.0

0.16/291.0

0.16/424.0

REL, RELA(Note 4)Gas

0.16/0.86

0.16/2.03

0.16/3.35

0.16/7.39

0.16/12.7

0.16/28.8

0.16/50.0

0.16/78.8

0.16/113.0

0.16/137.0

0.16/182.0

0.16/233.0

0.16/291.0

0.16/424.0

GFR-Series (Note 2)

Liquid

19.14/0.20

11.5/0.79

4.76/1.77

GFR-Series (Note 2)Gas

19.14/0.20

9.92/0.79

4.76/1.77

23.47/4.91

GCR-Series (Note 2)

Liquid

2.75/1.5

1.42/2.7

2.75/5.29

2.75/9.78

GCR-Series (Note 2)Gas

1.95/1.5

1.25/2.7

1.95/5.29

1.95/9.78

GCR-N (Series) (Note 2)

Liquid

2.75/1.5

1.42/2.7

GCR-N (Series) (Note 2)Gas

1.95/1.5

1.25/2.7

SLP-Series

Liquid

6.70/1.08

4.9/2.04

SLP-Series

Gas

6.70/1.08

4.9/2.04

9.9/3.55

GLP-S(Note 3)

Gas

10.0/0.86

10.0/1.93

10.0/3.36

A-2 Sta-Kul w/ FRB disk(Note 3)(Note 6)Gas

2.20/0.19

A-6 Sta-Kul, FRB disk(Note 6)Gas

2.19/0.19

A-10 Sta-Kul w/ Scored "B" (Note 6)

Gas

Sta-Kul, B disk; 3/4"

Gas

0.41/0.78
3.85/0.44

FRB WFTGas

A-6 Sta-Kul, "B"(Note 3)(Note 6)

Gas

35.7/0.21
6.44/0.19

A-6 Sta-Kul, "B" (w/ liner)(Note 3)(Note 6)Gas

6.44/0.19

A-19 Sta-Kul w/ Scored "B" (Note 6)

Gas

0.50/0.44

FRB w/ 3/4" San'y Connect(Note 3)

Gas/Liquid12.0/0.22

9.9/3.55
10.0/7.39

30.0"

36.0"

BS&B Safety Systems
KR (Left of Slash)/Minimum Net Flow Area (Right of Slash)
Minimum Net Flow Area (MNFA) in Square Inches

08 March 2024

Size

Style

Media
(Note 3)Gas

1" Welded FRB w/ 1/2" VCR Conn.

Gas

FRB w/ 3/4" San'y Connect

0.5"

0.6875"0.75"
5.9/0.22

16.95/0.126

5.0/0.20

1.0"

1.5"

2.0"

3.0"

4.0"

6.0"

8.0"

10.0"

12.0"

14.0"

16.0"

18.0"

20.0"

24.0"

30.0"

36.0"