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Ebara ISO flanges and hardware are manufactured to the International Standards Organization specification so they can be mated to other manufacturers' ISO flanges. ISO flanges are made from Argon Oxygen Decarburization (AOD) 304 stainless steel. This material is certified to meet ASTM-240 and has less than 0.01% sulfur in order to prevent sulfur stringers. Grain size is 3 to 6 per ASTM E-112.
Maximum inclusion size is 2.5 per ASTM E-45. Normally our standard material is in the low carbon range for 304 stainless steel. For increased corrosion resistance, some sizes are available from stock in 316L stainless steel.
Optional fastener and nonrotatable ISO flanges are available from stock for 2-1/2 to 20 inch tube sizes. Both use a Viton O-ring, held in place by a centering ring, to effect a seal with a vacuum range of 10-8 Torr. ISO components can be baked to 204ºC.
ISO flanges can also be used with standard clamps and aluminum seals to obtain a UHV seal bakeable to 150ºC.
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Applications: | |
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Specifications: | | SPECIFICATIONS | | General: Optional fastener or nonrotatable flanges with clearance bolt holes | | Nominal OD sizes: ISO-63 to ISO-500 | | Tube sizes: 2-1/2 to 20 inches | Materials
Flange: 304 or 316L stainless steel
O-rings: Viton, Buna
Bolts: 18-8 stainless steel | Vacuum range:
Elastomer seal: >= 1 x 10-8 Torr - High vacuum
EVAC metal seal: >= 1 x 10-11 Torr - UHV | Temperature range:
Viton: -20°C to 200°C
Buna: -30°C to 110°C
EVAC metal seal: -270°C to 150°C |
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ISO Clamp Style Flanges: |  | MODEL NUMBER | DIAGRAM | NOMINAL
ID | A | B | C | D | E | | ISO-63-000-OF | A | - | 3.740 | 0.47 | - | - | - | |
| ISO-63-250-OF | B | 21/2 | 3.740 | 0.47 | 2.438 | 2.510 | 0.250 | | ISO-80-000-OF | A | - | 4.331 | 0.47 | - | - | - | | ISO-80-300-OF | B | 3 | 4.331 | 0.47 | 2.938 | 3.010 | 0.250 | | ISO-100-000-OF | A | - | 5.118 | 0.47 | - | - | - | | ISO-100-400-OF | B | 4 | 5.118 | 0.47 | 3.910 | 4.010 | 0.250 | | ISO-160-000-OF | A | - | 7.087 | 0.47 | - | - | - | | ISO-160-600-OF | B | 6 | 7.087 | 0.47 | 5.875 | 6.020 | 0.375 | | ISO-200-000-OF | A | - | 9.449 | 0.47 | - | - | - | | ISO-200-800-OF | B | 8 | 9.449 | 0.47 | 7.875 | 8.020 | 0.375 | | ISO-250-000-OF | A | - | 11.417 | 0.47 | - | - | - | | ISO-250-1000-OF | B | 10 | 11.417 | 0.47 | 9.875 | 10.020 | 0.375 | | ISO-320-000-OF | A | - | 14.567 | 0.67 | - | - | - | | ISO-320-1200-OF | B | 12 | 14.567 | 0.67 | 11.875 | 12.020 | 0.375 | | ISO-320-1275-OF | B | 12 | 14.567 | 0.67 | 12.420 | 12.770 | 0.375 | | ISO-400-000-OF | A | - | 17.716 | 0.67 | - | - | - | | ISO-400-1600-OF | B | 16 | 17.716 | 0.67 | 15.624 | 16.020 | 0.375 | | ISO-500-000-OF | A | - | 21.653 | 0.67 | - | - | - | | ISO-500-2000-OF | B | 20 | 21.653 | 0.67 | 19.624 | 20.020 | 0.3 |
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ISO 316L Clamp Style Flanges: | | MODEL NUMBER | DIAGRAM | NOMINAL
ID | A | B | C | D | E | | ISO-63-250-OF-316L | B | 21/2 | 3.740 | 0.47 | 2.438 | 2.510 | 0.250 | | ISO-80-300-OF-316L | B | 3 | 4.331 | 0.47 | 2.938 | 3.010 | 0.250 | | ISO-100-400-OF-316L | B | 4 | 5.118 | 0.47 | 3.910 | 4.010 | 0.250 |
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ISO Rotatable Bolt Ring and Retainer Ring: | | MODEL NUMBER | FLANGE
SIZE | A | B | C | | ISO-63-BR | ISO-63 | 4.331 | 5.118 | 0.472 | | ISO-80-BR | ISO-80 | 4.921 | 5.709 | 0.472 | | ISO-100-BR | ISO-100 | 5.709 | 6.496 | 0.472 | | ISO-160-BR | ISO-160 | 7.874 | 8.858 | 0.630 | | ISO-200-BR | ISO-200 | 10.236 | 11.220 | 0.630 | | ISO-250-BR | ISO-250 | 12.205 | 13.189 | 0.630 | | ISO-320-BR | ISO-320 | 15.551 | 16.732 | 0.787 | | ISO-400-BR | ISO-400 | 18.898 | 20.079 | 0.787 | | ISO-500-BR | ISO-500 | 22.835 | 24.016 | 0.787 |
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ISO Non Rotatable Flanges: |
| MODEL NUMBER | DIAGRAM | NOMINAL
ID | A | B | C | D | E | F | BOLT
HOLES | BOLT
DIAMETER | | ISO-63-000N | A | - | 5.118 | 0.472 | - | - | - | 4.331 | 4 | 0.359 | | ISO-63-250N | B | 21/2 | 5.118 | 0.472 | 2.438 | 2.510 | 0.250 | 4.331 | 4 | 0.359 | | ISO-80-000N | A | - | 5.709 | 0.472 | - | - | - | 4.921 | 8 | 0.359 | | ISO-80-300N | B | 31/2 | 5.709 | 0.472 | 2.938 | 3.010 | 0.250 | 4.921 | 8 | 0.359 | | ISO-100-000N | A | - | 6.496 | 0.472 | - | - | - | 5.709 | 8 | 0.359 | | ISO-100-400N | B | 4 | 6.496 | 0.472 | 3.910 | 4.010 | 0.250 | 5.709 | 8 | 0.359 | | ISO-160-000N | A | - | 8.858 | 0.630 | - | - | - | 7.874 | 8 | 0.438 | | ISO-160-600N | B | 6 | 8.858 | 0.630 | 5.875 | 6.020 | 0.375 | 7.874 | 8 | 0.438 | | ISO-200-000N | A | - | 11.220 | 0.630 | - | - | - | 10.236 | 12 | 0.438 | | ISO-200-800N | B | 8 | 11.220 | 0.630 | 7.875 | 8.020 | 0.375 | 10.236 | 12 | 0.438 | | ISO-250-000N | A | - | 13.189 | 0.630 | - | - | - | 12.205 | 12 | 0.438 | | ISO-250-1000N | B | 10 | 13.189 | 0.630 | 9.875 | 10.020 | 0.375 | 12.205 | 12 | 0.438 | | ISO-320-000N | A | - | 16.732 | 0.787 | - | - | - | 15.551 | 12 | 0.551 | | ISO-320-1200N | B | 12 | 16.732 | 0.787 | 11.760 | 12.020 | 0.375 | 15.551 | 12 | 0.551 | | ISO-320-1275N | B | 12 | 16.732 | 0.787 | 12.420 | 12.770 | 0.375 | 15.551 | 12 | 0.551 | | ISO-400-000N | A | - | 20.079 | 0.787 | - | - | - | 18.898 | 16 | 0.551 | | ISO-400-1600N | B | 16 | 20.079 | 0.787 | 15.642 | 16.020 | 0.375 | 18.898 | 16 | 0.551 | | ISO-500-000N | A | - | 24.016 | 0.787 | - | - | - | 22.835 | 16 | 0.551 | | ISO-500-2000N | B | 20 | 24.016 | 0.787 | 19.642 | 20.020 | 0.375 | 22.835 | 16 | 0.551 |
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ISO Bolt Kits: | | MODEL NUMBER | DESCRIPTION | | B-ISO-63 | (4) SS bolts, nuts & washers, M8 x 40mm | | B-ISO-80 | (8) SS bolts, nuts & washers, M8 x 40mm | | B-ISO-100 | (8) SS bolts, nuts & washers, M8 x 40mm | | B-ISO-160 | (8) SS bolts, nuts & washers, M10 x 50mm | | B-ISO-200 | (12) SS bolts, nuts & washers, M10 x 50mm | | B-ISO-250 | (12) SS bolts, nuts & washers, M10 x 50mm | | B-ISO-320 | (12) SS bolts, nuts & washers, M12 x 60mm | | B-ISO-400 | (16) SS bolts, nuts & washers, M12 x 60mm | | B-ISO-500 | (16) SS bolts, nuts & washers, M12 x 60mm |
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ISO Double Claw Aluminum Clamp: | | MODEL NUMBER | FLANGE
SIZE | A | B | THREAD
SIZE | CLAMPS
REQUIRED | | ISO-63-DCP | ISO-63 | 0.94 | 1.96 | 5/16-18 | 3-4 | | ISO-80-DCP | ISO-80 | 0.94 | 1.96 | 5/16-18 | 4-8 | | ISO-100-DCP | ISO-100 | 0.94 | 1.96 | 5/16-18 | 4-8 | | ISO-160-DCP | ISO-160 | 1.10 | 1.96 | 5/16-18 | 4-8 | | ISO-200-DCP | ISO-200 | 1.10 | 1.96 | 5/16-18 | 6-12 | | ISO-250-DCP | ISO-250 | 1.10 | 1.96 | 5/16-18 | 6-12 | | ISO-320-DCP | ISO-320 | 1.34 | 2.20 | 7/16-14 | 8-12 | | ISO-400-DCP | ISO-400 | 1.34 | 2.20 | 7/16-14 | 8-16 | | ISO-500-DCP | ISO-500 | 1.34 | 2.20 | 7/16-14 | 12-16 |
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ISO Single Claw Aluminum Clamp: | | MODEL NUMBER | FLANGE
SIZE | A | B | C | THREAD
SIZE | CLAMPS
REQUIRED | | ISO-63-SCP | ISO-63 | 0.94 | 1.18 | 0.52 | 5/16-18 | 4 | | ISO-80-SCP | ISO-80 | 0.94 | 1.18 | 0.52 | 5/16-18 | 8 | | ISO-100-SCP | ISO-100 | 0.94 | 1.18 | 0.52 | 5/16-18 | 8 | | ISO-160-SCP | ISO-160 | 1.10 | 1.18 | 0.52 | 5/16-18 | 8 | | ISO-200-SCP | ISO-200 | 1.10 | 1.18 | 0.52 | 5/16-18 | 12 | | ISO-250-SCP | ISO-250 | 1.10 | 1.18 | 0.52 | 5/16-18 | 12 | | ISO-320-SCP | ISO-320 | 1.34 | 1.46 | 0.88 | 7/16-14 | 12 | | ISO-400-SCP | ISO-400 | 1.34 | 1.46 | 0.88 | 7/16-14 | 16 | | ISO-500-SCP | ISO-500 | 1.34 | 1.46 | 0.88 | 7/16-14 | 16 |
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ISO Single Claw Aluminum Clamp - Metric: | | MODEL NUMBER | FLANGE
SIZE | A | B | C | THREAD
SIZE | CLAMPS
REQUIRED | | ISO-63-SCP-M | ISO-63 | 0.94 | 1.20 | 0.40 | M8 x 1.25 | 4 | | ISO-80-SCP-M | ISO-80 | 0.94 | 1.20 | 0.40 | M8 x 1.25 | 8 | | ISO-100-SCP-M | ISO-100 | 0.94 | 1.20 | 0.40 | M8 x 1.25 | 8 | | ISO-160-SCP-M | ISO-160 | 1.10 | 1.20 | 0.40 | M10 x 1.50 | 8 | | ISO-200-SCP-M | ISO-200 | 1.10 | 1.20 | 0.40 | M10 x 1.50 | 12 | | ISO-250-SCP-M | ISO-250 | 1.10 | 1.20 | 0.40 | M10 x 1.50 | 12 | | ISO-320-SCP-M | ISO-320 | 1.34 | 1.48 | 0.79 | M12 x 1.75 | 12 | | ISO-400-SCP-M | ISO-400 | 1.34 | 1.48 | 0.79 | M12 x 1.75 | 16 | | ISO-500-SCP-M | ISO-500 | 1.34 | 1.48 | 0.79 | M12 x 1.75 | 16 |
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ISO Aluminum Centering Ring with O-ring and Aluminum Spacer Ring: | | MODEL NUMBER | DIAGRAM | O-RING
MATERIAL | A | B | | ISO-63-CR-AV* | A | Viton | 2.63 | 2.74 | | ISO-63-CR-AB* | A | Buna | 2.63 | 2.74 | | ISO-80-CR-AV | A | Viton | 3.14 | 3.25 | | ISO-80-CR-AB | A | Buna | 3.14 | 3.25 | | ISO-100-CR-AV | A | Viton | 3.89 | 4.00 | | ISO-100-CR-AB | A | Buna | 3.89 | 4.00 | | ISO-160-CR-AV | A | Viton | 5.90 | 6.01 | | ISO-160-CR-AB | A | Buna | 5.90 | 6.01 | | ISO-200-CR-AV | A | Viton | 8.26 | 8.37 | | ISO-200-CR-AB | A | Buna | 8.26 | 8.37 | | ISO-250-CR-AV | A | Viton | 10.14 | 10.25 | | ISO-250-CR-AB | A | Buna | 10.14 | 10.25 | | ISO-320-CR-AV | B | Viton | 12.32 | 12.51 | | ISO-320-CR-AB | B | Buna | 12.32 | 12.51 | | ISO-400-CR-AV | B | Viton | 15.55 | 15.75 | | ISO-400-CR-AB | B | Buna | 15.55 | 15.75 | | ISO-500-CR-AV | B | Viton | 19.53 | 19.72 | | ISO-500-CR-AB | B | Buna | 19.53 | 19.72 |
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ISO Stainless Steel Centering Ring with O-ring and Aluminum Spacer Ring: | | MODEL NUMBER | DIAGRAM | O-RING
MATERIAL | A | B | | ISO-63-CR-SV | A | Viton | 2.63 | 2.74 | | ISO-80-CR-SV | A | Viton | 3.14 | 3.25 | | ISO-100-CR-SV | A | Viton | 3.89 | 4.00 | | ISO-160-CR-SV | A | Viton | 5.90 | 6.01 | | ISO-200-CR-SV | A | Viton | 8.26 | 8.37 | | ISO-250-CR-SV | A | Viton | 10.14 | 10.25 | | ISO-320-CR-SV | B | Viton | 12.36 | 12.52 | | ISO-400-CR-SV | B | Viton | 15.55 | 15.75 |
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ISO 316L Stainless Steel Centering Ring with O-ring and Aluminum Spacer Ring: | 
| MODEL NUMBER | O-RING
MATERIAL | A | B | | ISO-63-CR-SV-316L | Viton | 2.63 | 2.74 | | ISO-80-CR-SV-316L | Viton | 3.14 | 3.25 | | ISO-100-CR-SV-316L | Viton | 3.89 | 4.00 |
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ISO Stainless Steel Centering Ring with O-ring: | | MODEL NUMBER | DIAGRAM | O-RING
MATERIAL | A | B | | ISO-63-CR | A | Viton | 2.63 | 2.74 | | ISO-80-CR | A | Viton | 3.14 | 3.25 | | ISO-100-CR | A | Viton | 3.89 | 4.00 | | ISO-160-CR | A | Viton | 5.90 | 6.01 | | ISO-200-CR | A | Viton | 8.26 | 8.37 | | ISO-250-CR | A | Viton | 10.14 | 10.25 | | ISO-320-CR | B | Viton | 12.32 | 12.52 | | ISO-400-CR | B | Viton | 15.55 | 15.74 |
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ISO Screened Stainless Steel Centering Ring with O-ring and Aluminum Spacer Ring: | 
| MODEL NUMBER | O-RING
MATERIAL | A | B | C | MESH
(sq./in.) | | ISO-63-CR-SV-16 | Viton | 2.63 | 2.74 | 2.38 | 16 | | ISO-80-CR-SV-16 | Viton | 3.14 | 3.25 | 2.87 | 16 | | ISO-100-CR-SV-16 | Viton | 3.89 | 4.00 | 3.50 | 16 | | ISO-160-CR-SV-16 | Viton | 5.90 | 6.01 | 5.50 | 16 |
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Description: | | NOTE: Other O-Ring Materials Available upon request |
Viton O-ring: | | MODEL NUMBER | FLANGE
TYPE | | ISO-63-0R-V | ISO-63 | | ISO-80-OR-V | ISO-80 | | ISO-100-OR-V | ISO-100 | | ISO-160-OR-V | ISO-160 | | ISO-200-OR-V | ISO-200 | | ISO-250-OR-V | ISO-250 | | ISO-320-OR-V | ISO-320 | | ISO-400-OR-V | ISO-400 | | ISO-500-OR-V | ISO-500 |
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Buna O-ring: | | MODEL NUMBER | FLANGE
TYPE | | ISO-63-0R-B | ISO-63 | | ISO-80-OR-B | ISO-80 | | ISO-100-OR-B | ISO-100 | | ISO-160-OR-B | ISO-160 | | ISO-200-OR-B | ISO-200 | | ISO-250-OR-B | ISO-250 | | ISO-320-OR-B | ISO-320 | | ISO-400-OR-B | ISO-400 | | ISO-500-OR-B | ISO-500 |
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Assembly Instructions: | Optional fastener flanges are joined around the periphery with clamps. Double claw clamps are used when a pair of OF flanges are joined (See diagram A.), or single claw clamps are used to join an OF flange to a tapped nonrotatable on a pump or gate valve. (See diagram B.) This fastening method allows the OF flange to be rotated for ease of component alignment. Additionally, a rotatable bolt ring can be used to fasten an OF flange to a nonrotatable flange using bolts. (See diagram C.) A retainer ring prevents the OF flange from slipping through the bolt ring. Nonrotatable ISO flanges are assembled with bolts. (See diagram D.) They do not allow rotation of bolt holes on mating flanges to align components.
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