KDV WEIR TYPE DIAPHRAGM VALVE
Screwed Weir Type Diaphragm Valve
KDV’s Screwed Diaphragm Valve combines a Weir Type design with threaded end connections for reliable flow control across a range of industrial applications. Available in cast iron, ductile iron, WCB, and stainless steel body materials, the valve isolates process media from its mechanical components and supports multiple diaphragm options for 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 Diaphragm Valves
- 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
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
