Description
FLUITEN Standard Mechanical API682 Seals LL8F – Dual face-to-face seal suitable for pressurized nitrogen flushing: 3NC-FF; Cat. 1; Type A.
Key Technical Specifications:
| DIAMETER | SPEED | PRESSURE | TEMPERATURE |
|---|---|---|---|
| 20-110 (mm) | 0-23 (m/sec) | 0-20 (bar g) | -40 – 176 (°C) |
Why Choose FLUITEN LL8F?
The LL8F is a face-to-face, dual- seal that uses Fluilift gas-lift technology to achieve non-contact sealing of process rings. A pressurized nitrogen barrier lifts the rings by microns, virtually eliminating friction and energy loss. This design ensures zero emissions, minimal wear, and outstanding efficiency, especially in toxic or environmentally sensitive fluid services.
Key Technical Specifications
Seal Type: Dual-cartridge face-to-face configuration with gas-lift barrier
Barrier Gas: Pressurized nitrogen floats rotating rings to eliminate surface contact
Seal Faces:
Stationary rings: Dry-running resin-impregnated graphite
Rotating rings: Reaction-bonded or sintered silicon carbide
Gaskets: Elastomer seals (options include FKM, EPDM, or FFKM) on rotating/stationary rings, sleeve, and flange
Springs: External Hastelloy springs mounted outside process fluid zone
Drive Mechanism: Specialized rotating ring drive maintains hydrodynamic lift under vibration, misalignment, and ring wear
Flange & Sleeve: Compact cartridge flange and shaft sleeve customized per pump type
Design Focus: Zero-emission operation, near-zero friction, and high energy efficiency
Typical Applications
ANSI-compatible pumps handling toxic, volatile, or environmentally critical fluids
Systems that must avoid emissions, such as in chemical or petrochemical sectors
Installations seeking high-efficiency, low-wear sealing under demanding operating conditions
Additional Features
Non-contact hydrodynamic sealing eliminates friction and wear
Minimal barrier gas consumption thanks to Fluilift efficiency
Zero atmospheric emissions, ideal for stringent environmental standards
Compact, dual-cartridge format supports easy installation and reliable pump retrofit
Robust drive system ensures seal lift and stability in high-vibration environments
