Plastic Lined - ST

Straight Through type Diaphragm Valves – Plastic Lined

KDVs Straight Through 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


  • Abrasive chemicals
  • Acids (sulphuric, hydrochloric,nitric)
  • Highly corrosive slurries
  • Minerals reduction chemicals
  • Hydro metallurgy
  • Organic sludge
  • Effluent treatment
  • Lime solutions
  • Caustics
Nominal Size:  DN15-DN150
Face to Face: BS, DIN, MSS
Flange Drilling: ANSI#125/150, PN10/16, Table D/E, JIS
Pressure: 10 Bar

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)

Design Standards

EN13397-2001 (BS5156:1985)
MSS SP88-1993-(R-01)

Testing Standards

EN12266-1 2002(BS6755 Part 1)
MSS SP88-1993-(R-01)



ST Range Brochure

1.94 MB

Actuation Brochure

1.45 MB

ST Diaphragms Brochure

707.23 KB

Data Sheet

MSS SP88-1993-(R-01)

DN25-DN100 Rising Handwheel

290.26 KB

DN25-DN100 Non Rising Handwheel

267.96 KB
EN558-1 Series 1(DIN3202-F1)

DN25-DN100 Rising Handwheel

289.25 KB

DN25-DN100 Non Rising Handwheel

259.75 KB
EN558-1 Series 7(BS5156)

DN25-DN150 Rising Handwheel

290.02 KB

DN25-DN150 Non Rising Handwheel

250.67 KB

Installation and Operation Manual

KDV Diaphragm Valves Service

955.41 KB