R8 & R8B rotary Seal

R8 R9 Assembly Seal
An off the shelf seal in (2) formats: Unbalanced or Balanced (higher pressures).

Features and Benefits

  • Positive set screw drive eliminates seal damage due to slippage. Shaft torque is transmitted directly through the seal to the precision lapped faces.
  • These seals offer a cost effective, easy-to-install in-field repair kit.
  • R8 (unbalanced) good up to 200psi.
  • R8B (balanced) good up to 600 psi.

Technical Data and Dimensions

R8 Rotary Seal Dimensions

R8B Rotary Seal Dimensions

Inches
Shaft Size Decimal shaft size Code a b
.750 012 1.375 1.625
.875 014 1.500 1.625
1.000 016 1.625 1.625
1.125 018 1.750 1.625
1.250 020 1.875 1.625
1.375 022 2.000 1.812
1.500 024 2.125 1.812
1.625 026 2.250 1.812
1.750 028 2.375 1.812
1.875 030 .2.500 1.812
2.000 032 2.625 1.812
2.125 034 2.750 1.812
2.250 036 2.875 1.812
2.275 038 3.000 1.812
2.500 040 3.250 1.937
2.625 042 3.375 1.937
2.750 042 3.375 1.937
2.750 044 3.500 1.937
2.875 046 3.625 1.937
3.000 048 3.750 1.937
3.125 050 3.875 1.937
3.250 052 4.000 1.937
3.375 054 1.125 1.937
3.500 056 4.250 1.937
3.625 058 4.375 1.937
3.875 062 4.625 1.937
4.000 064 4.750 1.937
4.125 066 4.875 1.937

SIZES: Available in METRIC. If you don't see your size call us.



Operating Specifications

R8 (unbalanced)
200 psi / 400 F
R8B
600 psi / 400° F
RPM: 3600 max.


Standard Material Construction

Metal Components: 316 Stainless Steel

Secondary Seal
Viton, Buna, EPDM, Neoprene, Aflas

Face
Carbon Graphite, Silicon Carbide, Tungsten Carbide


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.

Disclaimer

The temperature limits, pH ranges, pressure ratings, feet per box and shaft speeds shown throughout this pamphlet are representative; the service life and performance of these products can be affected by elevated temperatures and other operating conditions such as chemical resistance, shaft speeds, pressure and equipment in which that the product is being installed. The ratings supplied are suggested as a guideline and should only be used for evaluating your specific application. When in doubt, contact Robco or your ENVIROPAK distributor. The information contained in the pamphlet should not be considered to be a warranty, expressed or implied, including, but not limited to, a warranty of merchantability or fitness for a particular purpose. In no event shall Robco be liable for any incidental or consequential damages resulting from the use, misuse or inability to use the products. This exclusion applies regardless of whether such damages are sought based on breach of warranty, breach of contract, negligence, strict liability in tort, or any other legal theory.

All Robco mechanical seals are manufactured, assembled and tested in America.