Tipo Type: S20, S21

• General info
• Design Standards API 609.
  Size Range 2” to 20”.
  Pressure Class 100 and 150 PSI (CWP).
  Wafer and lug connections (with screwed flanges).
  Manual, pneumatic and electric valve drive.

• Materials
• Body: Ductile Iron A536 65-45-12, Cast Iron A126 Gr B, Stainless Steel A351 CF8M.
  Disc-shaft: Stainless steel 17-4 PH - PTFE or EPDM coated stainless steel A351 CF8M.
  Seat: PTFE, BUNA N, EPDM, Viton.

• Features
• 17-4 PH as base material for disc-stem assembly.
  3.0 mm minimum thickness of PTFE on the shaft
  disc assembly.
  Pure PTFE seat 1.5 mm minimum thickness.
  Triple seal on the passage through the shaft.
  Nylon 11 as Standard body coating.