KDV WEIR TYPE DIAPHRAGM VALVE
Screwed Steel Weir Type Diaphragm Valve
KDV’s Screwed Steel Diaphragm Valve combines a compact Weir Type design with screwed end connections for reliable flow control in industrial applications. Available with WCB or stainless steel body construction, the valve isolates process media from its mechanical components and supports a range of diaphragm materials to suit different operating conditions.
FEATURES AND 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 for Screwed Steel Diaphragm Valves
- Water and waste water
- Organic sludge
- Effluent treatment
- Lime solutions
- Gases (e.g. compressed air)
- Lubricating oil
Nominal Size:
DN15 – DN50
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
Design Standards:
EN13397-2001 (BS5156:1985)
MSS SP88-1993-(R-01)
Testing Standards:
EN12266-1 2002(BS6755 Part 1)
MSS SP88-1993-(R-01)
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
MATERIALS OF CONSTRUCTION
