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Flanges & Components > ASA Flanges & Components > ASA Flanges

ASA Flanges–Rotatable Grooved

ASA flanges, adapted decades ago from 150# steam-pipe flanges, are simple, sexed vacuum seals—one flange is grooved to accept an o-ring while the mating flange is smooth.

ASA flanges are limited (by the o-ring's properties) to applications with temperatures between ~0° C and 120-180° C and pressure from atmosphere to ~10-7 torr or mbar. These flanges are sized by the connecting pipe's nominal I.D. in inches. The normal range is: 1", 1.5", 2", 3", 4", 6", 8", and 10". They have large diameter bolt holes through the rim; consequently, for any given tube diameter, ASA flanges have much larger O.D.s than other flange types.

NOTE: When buying ASA flanged fittings and components, always compare dimensions carefully. When purchasing flanges to mate to an existing item, have that item's flange O.D., I.D., number of bolt holes, bolt circle diameter, and the handy o-ring groove I.D. for quick reference.

Dimensional Drawings

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Ordering Table

(Click column headers to sort data)

Bore Dim
A
Dim
B
Dim
C
Dim
D
Dim
E
Dim
F
Bolt
Holes
Bolt Hole
Diam.
ASA Flange
Size
Weight
lbs
PartNo Price Add Item
VacuCADSM
Bore Dim
A
Dim
B
Dim
C
Dim
D
Dim
E
Dim
F
Bolt
Holes
Bolt Hole
Diam.
ASA Flange
Size
Weight
lbs
PartNo Price Add Item
VacuCADSM
- 11 0.75 Blank n/a n/a 9.5 8 0.81 6 19
ASA1100X00GR
$459.00
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6.02 11 0.75 6.02 5.92 0.38 9.5 8 0.81 6 10
ASA1100X60GR
$485.00
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8.02 11 0.75 8.02 7.88 0.38 9.5 8 0.81 6 9
ASA1100X80GR
$500.00
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- 13.5 0.75 Blank n/a n/a 11.75 8 0.81 8 40
ASA1350X00GR
$552.00
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10.02 13.5 0.75 10.02 9.88 0.38 11.75 8 0.81 8 15
ASA1350X10GR
$570.00
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8.02 13.5 0.75 8.02 7.88 0.38 11.75 8 0.81 8 18
ASA1350X80GR
$588.00
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- 16 0.75 Blank n/a n/a 14.25 12 0.81 10 55
ASA1600X00GR
P.O.R.
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10.02 16 0.75 10.02 9.88 0.38 14.25 12 0.81 10 23
ASA1600X10GR
$1,046.00
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12.02 16 0.75 12.02 11.88 0.38 14.25 12 0.81 10 20
ASA1600X12GR
P.O.R.
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- 4.25 0.5 Blank n/a n/a 3.13 4 0.63 1 1
ASA425X00GR
P.O.R.
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1.01 4.25 0.5 1.01 0.94 0.25 3.13 4 0.63 1 1
ASA425X10GR
$150.00
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1.51 4.25 0.5 1.51 1.44 0.25 3.13 4 0.63 1 1
ASA425X15GR
$150.00
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- 5 0.5 Blank n/a n/a 3.88 4 0.63 1.5 2
ASA500X00GR
$170.00
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1.51 5 0.5 1.51 1.44 0.25 3.88 4 0.63 1.5 2
ASA500X15GR
$181.00
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2.01 5 0.5 2.01 1.94 0.25 3.88 4 0.63 1.5 2
ASA500X20GR
$181.00
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2.51 5 0.5 2.51 2.44 0.25 3.88 4 0.63 1.5 2
ASA500X25GR
P.O.R.
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- 6 0.5 Blank n/a n/a 4.75 4 0.75 2 3
ASA600X00GR
$232.00
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2.01 6 0.5 2.01 1.94 0.25 4.75 4 0.75 2 2
ASA600X20GR
$227.00
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2.51 6 0.5 2.51 2.44 0.25 4.75 4 0.75 2 2
ASA600X25GR
$227.00
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3.01 6 0.5 3.01 2.94 0.25 4.75 4 0.75 2 2
ASA600X30GR
$227.00
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3.51 6 0.5 3.51 3.44 0.25 4.75 4 0.75 2 2
ASA600X35GR
P.O.R.
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- 7.5 0.5 Blank n/a n/a 6 4 0.75 3 6
ASA750X00GR
$268.00
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3.01 7.5 0.5 3.01 2.94 0.25 6 4 0.75 3 4
ASA750X30GR
$289.00
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3.51 7.5 0.5 3.51 3.44 0.25 6 4 0.75 3 4
ASA750X35GR
$289.00
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4.01 7.5 0.5 4.01 3.92 0.25 6 4 0.75 3 4
ASA750X40GR
$299.00
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- 9 0.5 Blank n/a n/a 7.5 8 0.75 4 9
ASA900X00GR
$309.00
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4.01 9 0.5 4.01 3.92 0.25 7.5 8 0.75 4 5
ASA900X40GR
$320.00
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6.02 9 0.5 6.02 5.92 0.25 7.5 8 0.75 4 5
ASA900X60GR
$320.00
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Flange Selection Guide
With a variety of flanges to choose from, the Flange Selection Guide is designed to help you find one to meet your vacuum requirements. Shop Now!
Can't find the flange you need or want a custom configuration? Please call us at 1-412-387-9200 or email international@lesker.com with your inquiry.

Accessories Table

Description For Per Package Weight lbs (kg) Manual PartNo Price Add Item
VacuCADSM
Description For Per Package Weight lbs (kg) Manual PartNo Price Add Item
VacuCADSM
Bolt Sets, 9/16—12 x 1.50"
Size 1 ASA & 1.5 ASA Flanges
4
3/4 (0.34)
--
HBS563121504
$12.40
N/A
Bolt Sets, 5/8—11 x 1.75"
Size 2 ASA & 3 ASA Flanges
4
1 (0.45)
--
HBS625111754
$16.00
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Bolt Sets, 5/8—11 x 1.75"
Size 4 ASA Flanges
8
1-1/2 (0.68)
--
HBS625111758
$29.90
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Bolt Sets, 3/4—10 x 2.50"
Size 6 ASA & 8 ASA Flanges
8
2 (0.91)
--
HBS751025008
$47.00
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Bolt Sets, 3/4—10 x 2.50"
Size 10 ASA Flanges
12
2-1/2 (1.13)
--
HBS751025012
$70.00
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O-Rings (Fluorocarbon)
Size 1 ASA Flanges
1
1/4 (0.11)
--
O-V223
$21.20
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O-Rings (Fluorocarbon)
Size 1.5 ASA Flanges
1
1/4 (0.11)
--
O-V231
$8.50
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O-Rings (Fluorocarbon)
Size 2 ASA Flanges
1
1/4 (0.11)
--
O-V238
$21.70
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O-Rings (Fluorocarbon)
Size 3 ASA Flanges
1
1/4 (0.11)
--
O-V247
$21.70
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O-Rings (Fluorocarbon)
Size 4 ASA Flanges
1
1/4 (0.11)
--
O-V258
$34.00
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O-Rings (Fluorocarbon)
Size 6 ASA Flanges
1
1/4 (0.11)
--
O-V266
$23.70
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O-Rings (Fluorocarbon)
Size 8 ASA Flanges
1
1/4 (0.11)
--
O-V274
$21.70
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O-Rings (Fluorocarbon)
Size 10 ASA Flanges
1
1/4 (0.11)
--
O-V278
$24.80
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