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
Specification
| 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 |
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
Design Standards
EN13397-2001 (BS5156:1985)
MSS SP88-1993-(R-01)
Testing Standards
EN12266-1 2002(BS6755 Part 1)
MSS SP88-1993-(R-01)
