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Screwed Steel Weir Type

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

Specifications

Drawings & Technical Reference

Nominal Size:

Face to Face:

Thread:

Pressure:

DN15-DN50

Manufacturer's Standard

ANSI B2.1 NPT, AS1722.1 Part1 BSPP

Up to 16 Bar (Elastomer Diaphragm)*

Up to 10 Bar (PTFE Diaphragm)*

*Max pressure varies across size range

Materials of Construction

Diaphragm Materials

Design Standards

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

 

• EN13397-2001 (BS5156:1985)

• MSS SP88-1993-(R-01)

 

Testing Standards

• EN12266-1 2002(BS6755 Part 1)

• MSS SP88-1993-(R-01)

 

INSTALLATION & OPERATION MANUAL