KDVs Weir Type Diaphragm Valves offer exceptional durability, reliability and control.

The clean design completely isolates line media from the mechanical components of the valve.

Features & Benefits

  • Bubble-tight shutoff (Class VI)
  • Cavity free design
  • Easy/low maintenance
  • In-line serviceable (top entry)
  • No stem seal leakage
  • Standard Position indicator

Applications

  • Strong mineral and oxising acids
  • Sliding fine particulate abrasive media
  • Halogens
  • Alcohol
  • Esters

Nominal Size: DN15-DN250
Face to Face: BS, DIN, MSS
Flange Drilling: ANSI#125/150, PN10/16, Table D/E, JIS
Pressure: Up to 16 Bar (Elastomer Diaphragm)*
Up to 10 Bar (PTFE Diaphragm)*
*Max pressure varies across size range
Materials of Construction
Diaphragm Materials

  • 10 – Natural rubber (NR)
  • 20 – EPDM rubber
  • 30 – Butyl rubber (IIR)
  • 40 – Nitrile rubber (NBR)
  • 50 – Neoprene rubber (CR)
  • 60 – Hypalon rubber (CSM)
  • 70 – Viton rubber (FKM/FPM)
  • 92 – PTFE/EPDM backed
  • 93 – PTFE/Butyl backed
  • 96 – PTFE/Hypalon backed
  • 97 – PTFE/Viton backed
  • 98 – PTFE/Silicon backed
  • 9D – TFM/PVDF/EPDM (3 PIECE)
  • 9R – TFM/PVDF/EPDM (3 PIECE
  • with titanium Connector)
  • NB: Vacuum grade diaphragms available on request
Design Standards

  • • EN13397-2001 (BS5156:1985)
  • • MSS SP88-1993-(R-01)

Testing Standards

  • • EN12266-1 2002(BS6755 Part 1)
  • • MSS SP88-1993-(R-01)