R7 Assembly Seal
An "off-the-shelf" balanced internal seal for fuels, oils, chemicals, water and slurries.
Features and Benefits
- Balanced: The Exact-A-Gen is internally balanced, requiring no special sleeves or costly machining of shouldered shafts.
- No Fretting: The Exact-A-Gen seal will not fret sleeves or shafts. The 'O' ring on the shaft is static and should any fretting occur from the dynamic 'O' ring, it will be to the carbon holder, the least expensive part of the seal.
- Easy Installation: -One installation dimension is common to all Exact-A-Gen seals, regardless of shaft size.
- No Exchange: We supply an 'infield' repair kit for a fraction of the original cost. You don't have to send back seals for repair or exchange - this way it costs you less.
- Fits All AVS/ANSI Pumps: Replaces most seals or packing without pump or gland modification.
- Isolated Springs: Springs are out of the fluid being pumped, isolated from clogging particles suspended in the product.
- Non-Clog: Exact-A-Gen has eliminated unnecessary tight clearances leaving the seal open to continual washing by the product up to the 'O' ring.
- Drive Collar: Exact-A-Gen seal has a large cross section drive collar to eliminate distortion and static 'O' ring leakage.
| Material Specification | ||
| No. | Standard | Special |
| 1 | 316 S. Steel | * |
| 2 | 316 S. Steel | * |
| 3 | Viton Installed EPR optional |
KALREZ T.V.; AFLAS |
| 4 | Viton Installed EPR opitional |
KALREZ T.V.; AFLAS |
| 5 | Hastelloy-C | – |
| 6 | 316 S. Steel | * |
| 7 | 316 S. Steel | * |
| 8 | Chemical Grade Carbon | T. Carbide S. Carbide |
| INCH | |||
| A Shaft Size |
B Seal O.D. |
C – Min. Stuffing Box ø |
|
| 1 | 1.562 | 1.625 | |
| 1 1/8 | 1.687 | 1.750 | |
| 1 1/4 | 1.812 | 1.875 | |
| 1 3/8 | 1.937 | 2.000 | |
| 1 1/2 | 2.125 | 2.250 | |
| 1 5/8 | 2.250 | 2.375 | |
| 1 3/4 | 2.375 | 2.500 | |
| 1 7/8 | 2.500 | 2.625 | |
| 2 | 2.625 | 2.750 | |
| 2 1/8 | 2.750 | 2.875 | |
| 2 1/4 | 2.875 | 3.000 | |
| 2 3/8 | 3.000 | 3.125 | |
| 2 1/2 | 3.125 | 3.250 | |
| 2 5/8 | 3.250 | 3.375 | |
| 2 3/4 | 3.406 | 3.625 | |
| 2 7/8 | 3.687 | 3.875 | |
| 3 | 3.687 | 3.875 | |
| 3 1/8 | 3.937 | 4.125 | |
| 3 1/4 | 3.937 | 4.125 | |
| 3 3/8 | 4.187 | 4.375 | |
| 3 1/2 | 4.187 | 4.375 | |
| 3 5/8 | 4.437 | 4.625 | |
| 3 3/4 | 4.437 | 4.625 | |
| 3 7/8 | 4.687 | 7.875 | |
| 4 | 4.687 | 4.875 | |
Total Warranty
All Robco seals are manufactured to exact standards, and are guaranteed free of defects in materials and workmanship. All seals are guaranteed for 90 days from delivery, excepting negligence, misuse and abuse, and will deliver at our expense a new seal to replace any seal found to be defective within said period. No registration card is required.
The warranty is expressly in lieu al all warranties, expressed or implied, and of all obligation or liabilities on our part, including any liability for incidental or consequential damages.
Exclusive "Infield" Repair Kit
When it comes time to replace your Exact-A-Gen seal, you can repair it in your shop with our off the shelf infield repair kit. No new seals at full list price – no half price on exchange seals, but an 'infield' repair kit at a fraction of the original cost. No rebuilts – all new components. Because of the exclusive design, your seal can be repaired over and over again – costing you less. A repair kit consists of: new rotary face, and holder, O-rings, set screws, and springs.