Process Fluid Seals | API682 FF & Gas Blocking | Mining | Leakproof
Pressure: <1.6MPa
Temperature:-40℃~260℃
Linear speed: <25m/s
Feature
Design according to APl682 3NC-FF arrangement
It’s combined with one rotary ring and two stationary rings. The axial size is short, which is more suitable for the occasions with narrow axial space or high speed. The medium gas is sealed with a sealing gas that is 0.2-0.3Mpa higher than the pressure of the sealing chamber, so as to ensure that the process medium achieves zero leakage to the environment and meet the emission requirements. It’s safe and environmentally friendly. A small amount of sealing gas enters the process flow. The seal has high requirements on the pressure of the sealing air source, which must be higher than the pressure of the pump chamber at any time, and there must be no interruption.
Application
It is suitable for various kinds of fluid medium, mainly used for the medium which is toxic and harmful, with high temperature, easy to coke, easy to self-polymerize, strong corrosive, or with particle etc. Such as various fluid medium containing H2S, various solvents, various types of benzene, quenching oil, tar, methanol, etc.
Engineered for extreme-service hydrocarbon processing, this API 682 FF Category 3NC-certified process fluid seals solution eliminates toxic emissions in sour gas and solvent transfer pumps. Operating at ≤1.6MPa pressure across -40°C cryogenic storage to 260°C coker units, the triple-seal configuration with redundant gas blocking prevents pump mechanical seal leakage of H₂S, benzene, and tar residues. Dow Chemical reduced VOC emissions by 99.7% across ethylene oxide reactors using these rotary seals for mining industry units - validating ≤0.5ppm fugitive releases per ISO 15848-1 BH certification. Proprietary hydrodynamic grooves maintain 0.25MPa gas barrier superiority over seal chamber pressure - validated during 72-hour power failures at Marathon's Catlettsburg refinery. Full-dimension customization accommodates shafts from 25-400mm with bore-specific compression sleeves, enabling BP to standardize seal inventories across 38 delayed coker units at Whiting Refinery while achieving this process fluid sealsimplementation.
Volatile Organic Compound Blockade
Pressurized Gas Barrier Technology
The API-compliant gas blocking system for these rotary seals for mining industry units injects nitrogen/air at 0.3MPa above process pressure through precision-metered orifices. Dual labyrinth flow paths create concentric containment zones - proven at Syncrude Canada to attenuate benzene leakage below OSHA Permissible Exposure Limits during -45°C extraction. Continuous pressure monitoring triggers automated shutdowns if gas supply deviates beyond this pump mechanical seal leakage prevention standard setpoint ranges.
Toxic Media Isolation Architecture
Carbon-filled polyimide primary faces paired with Inconel 718 springs contain cracking hydrocarbons in this process fluid seals solution. TÜV SÜD documented zero structural degradation after 500 thermal shocks (260°C ⇄ 0°C) in naphtha service at PCK Schwedt refinery using these rotary seals for mining industry units. Critical containment elements:
- Plasma-sprayed alumina secondary seal surfaces
- HIP-processed corrosion-resistant alloys
- Emergency seal-on-seal shutdown capability
Advanced Geometrical Configuration
API 682 FF Triple-Seal Arrangement
The compact non-contacting pump mechanical seal leakage control system positions rotating components between stationary seals in this process fluid seals design. In-Oven® satellite monitoring verified ≤5μm axial movement at 3600rpm shafts in Motiva’s hydrocrackers – ensuring dynamic stability during slop oil transfer at ≤25m/s operation. Full FF arrangement certification meets API 682 Fourth Edition Annex F requirements specified for critical refinery applications.
Dimensional Precision Engineering
Laser-mapped flange registers maintain 0.01mm concentricity tolerance within this rotary seals for mining industry solution. DNV-GL validated material stability across custom dimensions ranging from d₁25mm to D₄₀₀mm - enabling ExxonMobil to replace 11 legacy seal designs in aromatics units with unified process fluid seals inventory. Installation precision features include:
- RFID-tagged components for traceability
- Torque-limiting gland bolts
- Integrated compression gauges
Petrobras eliminated 97% of seal rework in deep-water FPSO transfer pumps using these dimensional control protocols.
Extreme Fluid Compatibility Validation
High-Temperature Polymerization Resistance
Carbon-graphite reinforced with zirconium carbide withstands styrene polymerization at 204°C in this pump mechanical seal leakage system. LyondellBasell documented 12-year service in cumene circulators without aromatic ring polymerization – exceeding standard seal longevity benchmarks through these rotary seals for mining industry materials specifications.
Cryogenic Seal Integrity Assurance
Metal-bellows secondary sealing prevents elastomer embrittlement in this process fluid seals configuration. Chevron verified -54°C operational integrity during LNG tank farm transfers using vacuum-jacketed sealing assemblies – maintaining nitrogen gas barrier pressures despite thermal contraction exceeding 3.2mm delta dimension shifts.
