Cast Steel Gate Valves for Nuclear Applications

Features & Benefits

Available for nuclear class 1, 2, and 3 and safety related applications.

Design features

• Seat face CoCr alloy hardfaced, ground, and lapped to a mirror finish.
• Flexible wedge with low center stem-wedge contact, in solid CA15 (13Cr) or hardfaced with 13Cr, SS 316, Monel, or CoCr alloy. Wedge is ground and lapped to a mirror finish and tightly guided to prevent dragging and seat damage.
• Hardfacing of wedge guiding surfaces available when specified by purchaser.
• Non-rotating stem with precision Acme threads and burnished finish. Double start Acme for faster operation.
• Gland has two-piece construction for easy alignment.
• Body and bonnet joint accurately machined.
• Body and bonnet castings are precision machined. One-piece bonnet (2) for better alignment and fewer parts.
• End connection flanges in accordance with ASME B16.5
  ASME Classes: 150–300: 1⁄16” raised face.
  ASME Classes: 600–1500: ¼” raised face.
  Finish: 125–250 AARH for all valves.
• Rotating stem nut in Austenitic ductile iron Gr. D-2C and serviceable in line. When handwheel is used, thrust bearing arrangements vary depending on valve size and class.