Weir Type Diaphragm Valves – Screwed

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

Water and waste water
Organic sludge
Effluent treatment
Lime solutions
Gases (e.g. compressed air)
Lubricating oil

Nominal Size:	DN15-DN80
Face to Face:	Manufacturer’s Standard
Flange Drilling:	ANSI B2.1 NPT, AS1722.1 Part1 BSPP
Pressure:	Up to 16 Bar (Elastomer Diaphragm)* Up to 10 Bar (PTFE Diaphragm)* *Max pressure varies across size range

Material 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