SxSeal® 2000 Sulfur Trap

SxSeal® 2000

Above-ground Sulfur Seal Solution for SRU Rundown Lines


For many years, refineries and gas plants have employed in-ground seal legs to prevent process vapor from entering the sulfur pit or collection vessel. While seal legs perform this function up to a point, they are prone to water intrusion and mechanical plugging, which result in costly repairs and unplanned SRU downtime.

Above-ground sealing devices address many of these issues; but only CSI’s SxSeal® 2000 provides all the benefits of above-ground and in-ground sulfur sealing devices, without any trade-offs. In addition, the SxSeal® 2000 is backed by CSI’s engineering expertise, expansive production capacity, and exemplary customer service. As such, CSI’s SxSeal® 2000 delivers the technical and commercial value you have come to expect from CSI for over 50 years.

Standard Features:

  • Patented internal sealing mechanism: Easy to replace assembly; opens during pressure event to allow vapor discharge downstream
  • Stainless steel sealing components: Resistant to damage from corrosion; provides more durable sealing surfaces
  • Large debris collection area: No filters required; longer operating time between cleanings
  • Full port clean-out access through maintenance drain valve: Supports faster maintenance; minimizes down time
  • Sight glass view ports: Provides unit operating status; used to diagnose upset conditions
  • CSI ControTrace® external heating system: Proven, reliable heating performance without the added cost of traditional welded jacketing


  • Safe, reliable sealing performance: Prevents vapor from flowing downstream
  • Visual confirmation: Sight glasses provide visual confirmation of unit operating condition
  • Supplemental relief path: Sealing assembly opens during pressure event to allow vapor downstream
  • Simple installation: Entire unit installed above ground
  • Simple maintenance: No filters required; debris removed from settling area through clean-out access