When is a forged valve a better option than cast?

Trillium Flow Technologies is pleased to announce the introduction of the Atwood & Morrill® Forged Gate Valve

When is a forged valve a better option than cast?

Not only is the newest addition to the Trillium Flow Technologies product portfolio attracting customer interest, but they have already received orders. The Trillium Flow Technologies team recently manufactured four forged valves that were ordered for installation at a new build combined cycle plant in the Southeast United States – scheduled to go online in 2019.

Forged vs Cast Valve Bodies

Customers of Combined Cycle Power Plants have indicated that Type 91 gate valves have been experiencing shorter than anticipated life cycles. These valve bodies are traditionally cast in A217 C12A material.

The solution is to switch to a forged body

Based on customer feedback and industry research, Trillium Flow Technologies put together a dedicated project team to develop a product designed to tackle this specific customer problem. At temperatures above 1,000° F, a forged body is superior because;

  • Imperfections inherent to all castings impose greater risk in C12A applications due to the elevated temperatures and increased thermal cycling
  • Stringent code and customer requirements for C12A make it costly and cumbersome to process
  • Forged Type 91 material will have a higher initial hardness level than C12A castings due to differences in how the materials are processed indicating a longer life cycle
  • Forged valve bodies help minimize material defects and provide better quality and longer life valves, especially at elevated temperatures with thermal cycling conditions.
    The team at Trillium Flow Technologies pride themselves in working alongside their customers to identify better solutions that help them achieve their goals.