KDV WEIR TYPE DIAPHRAGM VALVE
Unlined Weir Type Diaphragm Valve
KDV’s Unlined Weir Type Diaphragm Valve provides reliable flow control for water, wastewater and general industrial applications. Its cavity-free design completely isolates the line media from the valve’s mechanical components, helping provide dependable shutoff, easy maintenance and long service life.
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
Unlined Weir Type Diaphragm Valve Applications
- Water and waste water
- Organic sludge
- Effluent treatment
- Lime solutions
- Gases (e.g. compressed air)
- Lubricating oil
Nominal Size:
DN15 – DN350
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
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
