Process Valves > Butterfly Valves > A-T Controls OC/OS


A-T Controls Series OC/OS Resilient Seated Butterfly Valves

AT-Controls' manual and automated resilient seated butterfly valves are designed to comply with MSS-SP-67, API-609, and API-598 standards. These ductile iron butterfly valves are ideal for general service, chemical, food, beverage, pulp and paper, and wastewater applications.

They come in wafer or lugged styles and offer multiple seat and disc material options (see catalog below for full list).

Key Specifications

  • Valves available in 1.5" to 24" sizes
  • Flow Cv: 0.9 to 31320, depending on valve size and trim
  • Pressure range: to 200 PSI
  • Temperature rating: -20° to 325° F
  • Precisely machined, epoxy-coated cast ductile iron bodies
  • Nickel-plated ductile iron disc, EPDM seat, and 416SS stem standard
  • Square stem design makes it easier to direct-mount actuators
  • Seat and disc material options available to fit almost any process application
  • Manual or automatic actuators available

Specifications, Manuals, and Supporting Literature

Click the file icon to view the file online, or right-click on the file icon and select "Save Target As..." to download the file to your computer for later viewing.
Tip: If you want to print a large file, download it to your PC first.


Subscribe to the Lesman Instrument Company YouTube channel.Lesman Instrument Company on YouTube

Video is a great way to learn about instruments and technology, and it's available whenever you need it. Watch step-by-step instructions on how to configure a transmitter, tune a controller, or troubleshoot a safety valve. We'll post videos we create, and those our manufacturer partners share with us, so you don't have to look in multiple places to find the video training you need.

Subscribe to Lesman's YouTube channel, and you'll get email notifications as soon as we add new training videos and webinars.