Features mechanical seal type 8648vrs
- 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
Recommended Applications type 8648vrs
- Crude oil pipeline pumps
About Mechanical seal type 8648vrs
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.
The main risk of seal failure in these applications is due to the numerous problems associated with the secondary dynamic O-ring, potentially resulting in hang up, fretting or stub sleeve wear. The unique design of the 8648VRS completely eliminates these common problems.
By allowing operation without the potential for secondary seal problems, the 8648VRS provides longevity and reliability even in the most difficult pipeline applications.
Design Features mechanical seal type 8648vrs
- Unique patented secondary seal technology prevents wear to the sealing diameter and prevents secondary seal hang-up
- Non-compressible flexible elastomer bellows
- Ear drive – primary ring incorporates optimized ear drive design for increased drive torque capability
- Balanced design – balanced construction, including anti-extrusion ring, permitting use in higher pressures
- Rotating mating ring design – enhances cooling and permits use at higher shaft speeds
- Premium seal face material options – permits sealing of difficult services at high operating pressures.
- Laser face grooved mating ring for use on flashing hydrocarbons
- 90 shore elastomer for robust construction
- Axially compact and easy-to-install seal head assembly
- Hard faces are standard to handle higher viscosity fluids and high torque application, as well as abrasive wear resistance. Carbon faces are standard to handle lighter viscosity fluids
- No O-rings in the pusher head assembly to fret under pump shuttling
- Robust drive for the most difficult of applications
- Static reverse pressure capability on the inboard seal of the dual pressurized configuration.
Material mechanical seal type 8648vrs
- Bellows: Viton 90 duro
- Primary Ring: Carbon
- Mating Ring: SiC
- Retainer: 316SS
- Drive band: Duplex SS
- Stub Sleeve: Duplex SS
- Spring adapter: 316 SS
- Anti X-ring: GFPTFE
- Spring: Hast C
- Snap-Ring: 316 SS
Operating range mechanical seal type 8648vrs
- Temperature: -4°F to 400°F/-20°C to 204°C
- Pressure: Dynamic pressure (single seal):
Up to 1,500 psig/100 barg (crude)
1,300 psig/90 barg (non-crude)
Dynamic pressure (dual seal):
Up to 1,750 psig/120 barg (crude)
Static pressure:
Up to 2,200 psig/152 barg (crude)
2,000 psig/138 barg (non-crude) - Speed: 5,000 fpm/25.3 m/s (crude)
6,000 fpm/31.5 m/s (non-crude)
Product Description type 8648vrs
John Crane 8648VRS is a standardized non-pusher elastomer mechanical seal using patented technology, designed specifically for difficult liquid hydrocarbon pipeline applications, with a focus
on meeting the demanding requirements of pipeline pumping station duties. Available as a single, dual pressurized or dual unpressurized arrangement, the seal can be configured to suit
both the operator and pipeline needs.
The main risk of seal failure in these applications is due to the numerous problems associated with the dynamic O-ring, potentially resulting in hang-up, fretting or stub-sleeve wear. The design of the 8648VRS completely eliminates these common problems.
By allowing operation without the potential for seal problems, the 8648VRS provides longevity and reliability even in the most difficult pipeline applications.
