Aqua Systems 2000 Inc.

Leaders in water management and control

Hydra - LOPAC® Gate

PDF icon Hydra LOPAC Gate898.18 KB

The LOPAC gate was developed by Peter Langemann in the 1980s to assist tail end irrigators in managing widely fluctuating water supplies. A number of installations have operated successfully for the past couple of decades. Aqua Systems 2000 Inc. (AS2I) has combined the simplicity of the LOPAC with a hydraulic actuator to provide a flexible and economical solution to water control problems in small to medium sized canal.


  • Irrigation check structures
  • Spillway structures
  • Diversions structures
  • Fish screening structures


  • Superior trash management
  • Low power requirements
  • Reliable, accurate control
  • Ease of Installation: LOPAC gates are fully assembled for shipping and are typically dropped into existing stop-log guides.


  • 3CR12 Stainless Steel
  • Hydraulic actuation
  • Environment friendly oil
  • Manual electric operation
  • NEMA 3 electrical panel
  • Motor starter, overload relay, limit switch Independent high-level emergency assist
  • 12 Vdc battery operation for reliability
  • Solar powered


  • 304 Stainless steel components where aggressive water is encountered
  • Operation Modes
    • Hydraulic
      • Automated
    • Screw jack
      • Manual (hand crank)
      • Manual electric
      • Automated