Model GSI (Square or Rectangular) and Model GRI (Round)

We custom design guillotine and slide gate dampers to suit your
particular application. Our rugged, heavy duty designs are available
in sizes from 10 to 84 inches, round or square.

No one standard design is suitable for all applications. After a thorough
review of your requirements, we select the best combination of our field
proven features and configurations to provide you with the most reliable,
economical solution to your isolation problems.

Listed below are the most common features and options from which
selections can be made. We specialize in custom designs for unusual
or severe duty applications.



  • Formed Channel
  • Structural Channel
  • Structural Angle
  • Carbon Steel
  • Stainless Steel
  • Abrasion and Corrosion Resistant Steels
  • Single Thick Plate
  • Our Standard Primer
  • Special Surface Preparation
  • Epoxy or Zinc Rich Coatings
  • Open Frame
  • Bonnet Covers (Bolted or welded)
  • 1000° F Max.
  • Standard designs to 1-PSI & 400 FPM process air with higher available.
  • Stainless Steel Compression Seals
  • Bar Slides/Seats
  • Limit Switches
  • Square to Round Transitions
  • Electric / Pneumatic / Manual
  • Chain and Sprocket
  • Jack Screw(s)
  • Rack and Pinion
  • Hand Wheel / Chain Wheel


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