John Crane Saves 99.8% on Water for LNG Exporter

Key Takeaways

• SB2 USP seal cut water use from 2,000 to 3‑4 gallons daily
• Seal operates reliably at 180‑200 °C, eliminating need for demineralized water flush
• Installation finished in eight weeks with no reported challenges
• Operator plans broader adoption of SB2 USP across LNG plant
• Water savings lower operating costs and reduce environmental impact

Pulse Analysis

The LNG export sector has long grappled with the high water demand of conventional mechanical seals, which rely on continuous demineralized‑water flushes to cool and lubricate pump shafts. At a Louisiana export terminal, the standard approach consumed roughly 2,000 gallons per day, inflating utility bills and straining local water resources. John Crane’s introduction of its Type SB2 USP dual‑cartridge seal disrupted this model, slashing daily water use to a mere 3‑4 gallons—a 99.8 % reduction that instantly reshaped the plant’s utility profile.

The SB2 USP seal leverages spiral‑groove technology and a non‑contacting upstream‑pumping mechanism, allowing it to operate safely between 180 °C and 200 °C without external water cooling. Instead of a bulk water flush, a small buffer fluid circulates internally, providing both lubrication and temperature control. This design eliminates the need for a dedicated demineralized‑water system, cutting pump‑related power consumption and simplifying maintenance. The eight‑week installation window demonstrated the seal’s plug‑and‑play compatibility, and performance data show stable seal integrity despite the plant’s high‑temperature, high‑pressure environment.

Beyond immediate cost savings, the water‑reduction breakthrough aligns with the broader industry push toward sustainable operations and stricter environmental regulations. Lower water intake reduces the plant’s freshwater footprint, a metric increasingly scrutinized by investors and regulators alike. As LNG demand expands, replicating the SB2 USP solution across other export terminals could generate millions of gallons of water savings annually, while also decreasing energy use associated with water treatment. John Crane’s rapid deployment showcases how advanced sealing technology can become a catalyst for both operational efficiency and corporate responsibility in the energy sector.