ISO Centering Ring
Sanitary Fittings
The ISO Centering Ring is an essential fitting in vacuum systems, which is designed to provide sealing between ISO flanged connections. It forms a leak-proof seal between two ISO flanges or fittings and maintains the desired vacuum pressure when combined with an O-ring and optionally with an outer ring or an overpressure ring.
We offer standard ISO centering rings and mesh centering rings. Their materials include stainless steel 304, 316L, and aluminum. The O-rings are available in Viton, NBR, and more.
Material： Stainless Steel 304, 316L, Aluminum
Size： ISO63 ~ ISO500
Vacuum Range： Down to 10-8 Torr
Available Parts：
| ISO Centering Ring SS304, Viton O-ring |
| ISO Centering Ring SS304, NBR O-ring |
| ISO Mesh Centering Ring SS304, Viton O-ring |
| ISO Centering Ring SS304 |
| ISO Overpressure Ring SS304 |
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ISO Aluminum Outer Ring, 304 Centering Ring, Viton O-ring
Model No. A B C D E O’ring
SizeIOCRV-63 67.0 69.6 8 3.9 94 AS-337 IOCRV-80 80.0 82.5 8 3.9 109 AS-341 IOCRV-100 99.0 101.6 8 3.9 128 AS-347 IOCRV-160 150.0 152.6 8 3.9 179 AS-362 IOCRV-200 210.0 212.6 8 3.9 238 AS-372 IOCRV-250 257.5 260.4 8 3.9 287 AS-378 IOCRV-320 312.0 317.3 12 5.6 344 AS-454 IOCRV-400 394.0 399.2 12 5.6 446 AS-461 IOCRV-500 494.0 500.2 12 5.6 535 AS-469 -
ISO Aluminum Outer Ring, Aluminum Centering Ring, Viton O-ring
Model No. A B C D E O’ring
SizeIOCRV-AL63 67.0 69.6 8 3.9 91 AS-336 IOCRV-AL80 80.0 82.5 8 3.9 104 AS-340 IOCRV-AL100 100.0 101.6 8 3.9 123 AS-346 IOCRV-AL160 150.0 152.6 8 3.9 170 AS-361 IOCRV-AL200 210.0 212.6 8 3.9 234 AS-371 IOCRV-AL250 257.5 260.4 8 3.9 285 AS-378 IOCRV-AL320 312.0 317.3 12 5.6 340 AS-454 IOCRV-AL400 394.0 399.2 12 5.6 416 AS-461 IOCRV-AL500 494.0 500.2 12 5.6 555 AS-470 -
ISO Aluminum Outer Ring (Spring), 304 Centering Ring, NBR O-ring
Model No. A B C D E O’ring
SizeIOCRN-63 67.0 69.6 8 3.9 91 AS-336 IOCRN-80 80.0 82.5 8 3.9 104 AS-340 IOCRN-100 100.0 101.6 8 3.9 123 AS-346 IOCRN-160 150.0 152.6 8 3.9 170 AS-361 IOCRN-200 210.0 212.6 8 3.9 234 AS-371 IOCRN-250 257.5 260.4 8 3.9 285 AS-378 IOCRN-320 312.0 317.3 12 5.6 340 AS-454 IOCRN-400 394.0 399.2 12 5.6 416 AS-461 IOCRN-500 494.0 500.2 12 5.6 555 AS-470 -
ISO Aluminum Outer Ring (Spring), Aluminum Centering Ring, NBR O-ring
Model No. A B C D E O’ring
SizeIOCRN-AL63 67.0 69.6 8 3.9 91 AS-336 IOCRN-AL80 80.0 82.5 8 3.9 104 AS-340 IOCRN-AL100 100.0 101.6 8 3.9 123 AS-346 IOCRN-AL160 150.0 152.6 8 3.9 170 AS-361 IOCRN-AL200 210.0 212.6 8 3.9 234 AS-371 IOCRN-AL250 257.5 260.4 8 3.9 285 AS-378 IOCRN-AL320 312.0 317.3 12 5.6 340 AS-454 IOCRN-AL400 394.0 399.2 12 5.6 416 AS-461 IOCRN-AL500 494.0 500.2 12 5.6 555 AS-470 -
ISO Aluminum Outer Ring, 304 Mesh Centering Ring, Viton O-ring
Model No. A B C D E O-ring IOMCRV-63 60.5 69.6 8 3.9 94 AS-337 IOMCRV-80 73.6 82.6 8 3.9 109 AS-341 IOMCRV-100 91.8 101.6 8 3.9 128 AS-347 IOMCRV-160 143.5 152.6 8 3.9 179 AS-362 -
ISO Centering Ring SS304, Viton O-ring
Model No. A B C D ICRV-63 67.0 69.5 8 3.9 ICRV-80 80.0 82.6 8 3.9 ICRV-100 100.0 101.6 8 3.9 ICRV-160 150.0 152.6 8 3.9 ICRV-200 210.0 212.6 8 3.9 ICRV-250 257.5 260.4 8 3.9 ICRV-320 312.0 317.3 12 5.6 ICRV-400 394.0 399.2 12 5.6 ICRV-500 494.0 500.2 12 5.6 -
ISO Centering Ring SS304, NBR O-ring
Model No. A B C D ICRN-63 67.0 69.5 8 3.9 ICRN-80 80.0 82.6 8 3.9 ICRN-100 100.0 101.6 8 3.9 ICRN-160 150.0 152.6 8 3.9 ICRN-200 210.0 212.6 8 3.9 ICRN-250 257.5 260.4 8 3.9 ICRN-320 312.0 317.3 12 5.6 ICRN-400 394.0 399.2 12 5.6 ICRN-500 494.0 500.2 12 5.6 -
ISO Mesh Centering Ring SS304, Viton O-ring
Model No. A B C D O-ring IMCRV-63 60.5 69.6 8 3.9 AS-337 IMCRV-80 73.6 82.6 8 3.9 AS-341 IMCRV-100 91.8 101.6 8 3.9 AS-347 IMCRV-160 143.5 152.6 8 3.9 AS-362 -
ISO Centering Ring SS304
Model No. A B C D ICR-63 67.0 69.6 8 3.9 ICR-80 80.0 82.5 8 3.9 ICR-100 99.0 101.6 8 3.9 ICR-160 150.0 152.6 8 3.9 ICR-200 210.0 212.6 8 3.9 ICR-250 257.5 260.4 8 3.9 ICR-320 312.0 317.3 12 5.6 ICR-400 394.0 399.2 12 5.6 ICR-500 494.0 500.2 12 5.6 -
ISO Overpressure Ring SS304
Model No. A B C IOR-80 106.0 66.55 3.9 IOR-100 125.3 119.3 3.9 IOR-160 176.4 170.4 3.9