Frequently Asked Questions > FAQ's (13 entries)

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  • Mechanical brushing will remove tough algae and fiberous materials better than any air burst cleaning system can. Cleaning cycles are user adjustable and very efficient. Brushes can ...
  • No — The primary moving part is a sealed marine-duty submersible hydraulic motor in each screen unit. The moving brush arms (on the cone screen) and the moving cylinder (on ...
  • Brushes have a very long useful life — at least several years under ordinary use, even without adjustment. Brush systems are very effective at screen cleaning; therefore, they are ...
  • Almost all of ISI’s cylindrical screens are designed and installed to be easily retrievable. ISI recommends that screens be retrieved during high flow events or when not in use for long ...
  • Yes. ISI has operational experience filtering down to 1200 microns using a suction side intake screen only. Filtering on the suction side can eliminate costly maintenance and operations of high pressure ...
  • Yes. Each screen is designed to meet tough standards for both regulatory compliance and sound intake protection. We design and provide installations to have the needed: screen area for fish ...
  • ISI cylinder screens distribute intake flows evenly over the entire screen surface by using a graduated porosity manifold inside each screen. Evenly distributing flows eliminates velocity “hot” spots that can contribute ...
  • Cone screens are generally the better choice when intakes are located in shallow waters (rivers, estuaries, lakes) or when a screened intake must be placed out of sight for aesthetic reasons ...
  • Cylinder Screens provide a very large screened surface area and are used in many river and lake intake applications. Cylindrical screens are easily adapted to the intakes of pumping units ...
  • Unlike air burst cleaned screens, there is no minimum water depth over the screen required for proper function. There may be practical reasons for placing a screen below the surface ...
  • Yes. ISI has engineering and computer aided design expertise and can help you determine the right application with the proper specifications for your project. We also offer Design/Build services.
  • Yes. ISI has installed a number of screens and necessary support structures. We are licensed general engineering contractor in California and experienced to install our systems as required. We also work ...
  • No. ISI screens and intake structures are designed to minimize headloss. When properly sized for the application, our screens will function reliably over a range of conditions. The mechanically cleaned ...