Safety Relief Valves – Ball & Seat – 5-8 Series

1"-3" NPT - ANSI Class 150, 300, 600, 900, 1500

CIRCOR Energy is pleased to offer the 5-8 Series as part of our safety relief valves portfolio. Below is a list of features that will enable you to better understand its capabilities.


  • 1 1/4"-2" NPT inlet sizes
  • 1" x 1" - 3" x 4" flange sizes
  • Incorporates hydroseal's "self-seeking seat" design
  • Viton® soft seat option provides primary seal with a metal-to-metal secondary seal
  • Manufactured in accordance with ASME code section VIII, NBBI capacity certified
  • ASME Sec VIII UV code stamped for air & gas (non-code liquid)

If you would like additional information, please click on any literature link below or Contact Us directly so that we may provide you with detailed specifications.




*Product Summary Catalog
PDF Size: 1.2MB
Legacy Series Brochure
PDF Size: 1.9MB
Safety Relief Valves - IOM Series 5-8
PDF Size: 20KB