Type 8648VRS Hydrocarbon Pipeline | Pump Seals | John Crane

Type 8648VRS

Garniture en élastomère sans ressort

Type 8648VRS is a standardized non-pusher elastomer mechanical seal using patented technology, designed specifically for difficult hydrocarbon oil pipeline applications. It is designed specifically with a focus on meeting the demanding requirements of pipeline pumping station duties. Available as a single, dual pressurized or dual unpressurized arrangement, without outboard seals also incorporating the same non-pusher technology, the seal can be configured to suit both the operator and pipeline needs.



  • California Residents: PROPOSITION 65 WARNING
  • Unique patented secondary seal technology prevents wear to the sealing diameter and prevents secondary seal hang up
  • Non-compressible flexible elastomer bellows avoids fretting under pump shuttling
  • Robust Ear drive — primary ring incorporates optimized ear drive design for increased drive torque capability
  • Balanced design – balanced construction, including anti-extrusion ring, permits use in the most demanding high-pressure pipeline duties
  • Rotating mating ring design — enhances cooling and permits use at higher shaft speeds
  • Premium seal face materials — permits sealing of difficult services at high operating pressures
  • High-shore elastomer for lack of deformation and robust construction
  • Axially compact and easy to install seal head assembly
  • Static reverse pressure capability on the inboard seal of the dual pressurized configuration
  • Laser face grooved mating ring for use on flashing hydrocarbons

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