Material Combinations (Optional)
Seal Faces: Sintered Silicon Carbide (SiC/SiC) or Tungsten Carbide (TC/TC) for maximum abrasion resistance
Secondary Seals: FKM (Viton) or EPDM elastomers, resistant to corrosive slurry and chemical attack
Metal Components: Duplex stainless steel (2205/2507) for superior corrosion and erosion resistance
Springs: 316L or Hastelloy C‑276, isolated from slurry to prevent clogging
MOR LC900-1150II is a single‑acting, balanced, cartridge‑style mechanical seal specifically engineered for large‑capacity flue‑gas desulfurization (FGD) slurry circulation pumps (e.g., LC900/1150 series pumps). It is designed to handle highly abrasive, corrosive limestone/gypsum slurries in coal‑fired power plants, offering exceptional wear resistance and reliable sealing performance under severe operating conditions.
Key Features
Cartridge Unitized Design: Pre‑assembled and preset as a complete unit, eliminating on‑site measurement and alignment errors, enabling quick installation and replacement without pump disassembly.
Single‑Face Balanced Structure: Hydraulically balanced seal geometry reduces face loading and heat generation, extending service life in high‑pressure slurry service.
Stationary Ring Compensation: Static seal face design isolates springs and dynamic seals from abrasive slurry, preventing clogging and wear.
Robust Abrasion Resistance: Hardened seal faces and corrosion‑resistant metal components are optimized for particle‑laden fluids.
External Spring Arrangement: Multi‑springs are located outside the process fluid, avoiding fouling and ensuring consistent face loading.
Split Inner Ring (Optional): Facilitates easy installation on large‑diameter shafts without removing the pump rotor.
Applications
Coal‑fired power plant FGD systems: Limestone/gypsum slurry circulation pumps
Large centrifugal slurry pumps: Handling abrasive, corrosive mineral slurries
Chemical and mining processes: Pumps transporting solid‑laden, corrosive fluids
Wastewater treatment: Sludge and abrasive wastewater pumps
Advantages
Superior Slurry Resistance: Optimized design resists abrasion and clogging from solid particles, extending seal life in FGD applications.
Low Maintenance: Cartridge design reduces downtime and simplifies replacement, critical for continuous power plant operation.
Reliable Leakage Control: Effectively contains corrosive slurry, preventing environmental contamination and equipment damage.
High Compatibility: Direct replacement for original equipment seals on LC900/1150 and equivalent large slurry circulation pumps.
Cost‑Effective: Long service intervals and minimal maintenance reduce total cost of ownership.
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